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Home My WebLink AboutIntertie Maintenance Committee Meeting Agendas and Notes 2004yo APF Dry Type Transformer Failure Investigation For Chugach Electric Association,Inc. NEETRAC Project Number:04-137 September,2004 Requested by:Charlie Kimmel Chugach Electric Association,Inc. Principal Investigator:Je c.Ceasfisr>Thomas C.CKafpion Reviewed by:Rick A.Hartlem/ APF Dry Type Transformer Failure Investigation NEETRAC Project Number 04-137 SUMMARY manubacturing deFect caused,Failure Mr.Charlie Kimmel with Chugach Electric Association requested that NEETRAC determine the cause of failure for an epoxy encapsulated dry-type transformer manufactured by AFP Transformers, LLC,of Edison,New Jersey.The transformer is listed as an Epoxycast®product from the company's cast coil transformer series.Two identifying numbers were present on the side of the primary coil adjacent to the high voltage terminals.These numbers were 4104117 and 26815.The primary coil of the transformer is constructed of two series connected coils,each with one tap. Jumpers allow the coils and taps to be configured for a nominal primary voltage rating of 13.3kV + 7.5%.A single secondary coil provides a nominal output voltage of 277V. Visual examination and dissection of the primary coil revealed a dielectric puncture between the second layer of the primary coil connected to the H2 lead and the Jumper 1 lead running from the opposite end of the H2 coil to the terminal block.The Jumper 1 lead was looped under the second layer of the H2 coil,resulting in approximately 6,575 volts across the layer-to-layer insulation within the coil,which is considered excessively high for the short separation distance.The lead routing may have been done to fix the lead during the casting process.However,this routing represents either a design or a manufacturing quality control problem. -{INTRODUCTION /SCOPE Chugach Electric Association,Inc.experienced a failure on an epoxy cast,dry-type transformer manufactured by AFP Transformers,LLC,A United Capital Company in Edison,New Jersey.The failure resulted in a split in the side of the primary coil casting in the area between the H1/H2 terminal block and the 1,2,3,4 jumper terminal block.Three transformers of identical design are used in combination to provide three-phase service from a metal-enclosed switchgear installation. The connected load consists primarily of motors associated with air handling equipment used to maintain building temperature.The building involved houses a switched VAR compensator system used to maintain power system stability.Temperature within the building is relatively constant at 77°F. Figure 1 shows the condition of the transformer as received at NEETRAC.The transformer is a cast coil design referred to by the manufacturer as Epoxycast®.The unit involved is rated 10kVA,1 Phase,60 Hertz with a nominal primary voltage rating of 13,300V and a nominal secondary voltage rating off 277V.The transformer consists of a primary coil placed over an inner secondary coil. Both coils enclose one leg of a laminated steel core.A secondary terminal strip is mounted on the side of the steel core.Terminals for the primary coil and its taps are molded into the side of the primary coil.By changing the jumpers the primary coil can be configured for a primary voltage of +7.5%of the nominal coil voltage rating.Figure 2 shows the clear plastic tag attached to the side of the primary coil between the terminal sets that provides the nameplate data for the unit.The coil configuration is schematically displayed on the data tag.The manufacturer's part number for the transformer is 4104177 with a serial number of 757V-01.The failed unit was manufactured on September 18,2001. NEETRAC Project Number 04-137,Final Report -September 20,2004 1 'Hi and H2 Terminals Configurable Connected nated; Secondary Terminals NEETRAC Project Number 04-137,Final Report -September 20,2004 2 3 ie i '.ee =ae Figure 2:Nameplate Data Imprinted on Clear Plastic Tag Attached to Primary Coil NEETRAC Project Number 04-137,Final Report -September 20,2004 3 PROCEDURE AND RESULTS Much of the outer coating of epoxy resin surrounding the transformer primary winding appeared to be soft and somewhat rubbery inconsistency.This offered a possibility that the epoxy coating could be removed at room temperature by simply slicing through the material without resorting to more extreme removal approaches.Removal of the encapsulating material would offer access to the windings and other internal details of the transformer construction,providing a simplified method of analyzing the cause of the failure. A sharp utility knife was used to cut through the encapsulating insulation in the area between the H1/H2 terminals and the terminals for the primary winding jumpers.This is the area where a carbonized split was visible in the side of the primary coil encapsulant as shown in Figure 1.Cuts were made to allow a wedge of encapsulating material to be removed.The cut ran along the inner edge of the H1/H2 terminal strip,down the side of the winding to the centerline of the split,across to the jumper terminal strip following the curvature of the coil edge,along the edge of the jumper terminal strip,and back along the other side of the coil edge.The wedge of epoxy was then pried away from the primary winding resulting in the view shown in Figure 3.This exposed the outer layer of two coils that formed the primary winding. Jumper Terminal Outer Strip Layer of Coil is Partial Width Full Width of H2 Coil Carbon Deposited between 1*and 2"Impregnated Layer of H2PaperCoilInsulation Figure 3:Outer Layer of H2 Coil after Overlying Insulation Removed Each coil was wrapped using lacquered,round copper wire.The outer layer covered only part of the coil width,going approximately two thirds of the way across the coil from the inner edge.Figure 3 shows the H2 coil and its outer winding layer.The outer layer was undamaged and appeared to be in good condition with no evidence of arcing or dielectric puncture.Under the layer was a piece of resin impregnated paper that was part of the insulation isolating each layer of the winding.Portions NEETRAC Project Number 04-137,Final Report -September 20,2004 4 of the paper insulation were burned through revealing carbon covering the layer below. Examination of the carbon revealed that it was coating the surface between two layers of impregnated paper insulation.Although the carbon covered much of the exposed area,the damage appeared to extend under the jumper terminals for the winding taps. To gain better access to the area of damage,cuts were made along both sides of the jumper terminal strip and across the ends.The terminal strip was then pried away from the body of the coil and folded back so that the terminal leads could be cut.Figure 4 shows the exposed and cut leads running from between the two primary coils out to the jumper terminals.On the right side of the figure is the H2 coil with the outer winding layer cut through and folded back.The H1 primary winding is on the left side of the figure.Using an ohmmeter,the individual leads were identified relative to the terminal strip markings and the schematic diagram of the winding assembly shown on the transformer nameplate.The two leads on the left side of Figure 4 were identified as connecting to terminals 2 and 4 of the jumper terminal strip.The two leads on the right side of Figure 4 were identified as connecting to terminals 1 and 3 of the jumper terminal strip.Each lead was surrounding by one or more tubes of woven fiber insulation.The insulation surrounding leads 1 and 2 exhibited evidence of damage with carbon coating the outer surface.The epoxy encapsulant surrounding these two leads was also cracked along the lead route with carbon covering the interior surface of the crack.Damage appeared to be most severe around the lead connecting to jumper terminal 1. Carbon Covered Crack in Terminals 1 Epoxy and 3 Leads Encapsulant Strip of WovenTerminals2.Faband4Leadsabric Tape Impregnated Paper Insulation between Layers=,13?ETERS «Sisgoaing am EeeionPSupticesa8".te *'a 4 ee Figure 4:Cut Tap Leads Exiting Between Coils on Way to Terminal Block When the fabric tape at the inner edge of the H2 coil outer layer was removed,arc damage to the last few turns at the edge of the layer was found as shown in Figure 5.The last four turns of the layer were burned in two with the arc appearing to have gone from the lead for jumper terminal 1 over to NEETRAC Project Number 04-137,Final Report -September 20,2004 5 the edge of the coil.Although the woven fiber tube surrounding the lead from jumper terminal | into the transformer coil appeared to be intact,probing with the tip of an ohmmeter probe revealed that the copper wire within the lead was vaporized on the side leading into the space between the coils. Terminal 3 Lead Terminal 1 Lead Damage to Strands at Edge of H2 Coil Figure 5:Arc Damage at Edge of H2 Coil to Terminal 1 Lead The final few strands of the H2 coil outer layer were cut in two so that the underlying layer of impregnated paper insulation could be sliced through at each end of the exposed coil section and removed.Removal of this insulation layer exposed the surface of another layer of impregnated paper insulation as shown in Figure 6.A large area across the surface of the layer was covered in carbon.A pattern looped across the surface that appeared to be the remains of a woven fiber tube similar to the one surrounding each of the tap leads running from the primary winding out to the jumper terminal strip.Remnants of the woven fiber tube remained,but the copper wire within the tube was completely vaporized.The loop appeared to extend out from the area where the 1 and 2 leads exited the space between the H1 and H2 coils,and then return to this area.The impregnated paper insulation layer within the bounds of the loop was burned away,exposing a third layer of impregnated paper insulation underneath.There was also a shiny area on the surface of the paper insulation near the point of closest approach to the outside edge of the H2 coil.This area appeared to mark a path where the plasma from a hot arc had traveled across the insulation surface and exited the epoxy encapsulant at the crack initially observed on the outer edge of the winding assembly. To get a better understanding of how the primary coil assembly was constructed,a diamond saw was used to cut a cross-section through the assembly as shown in Figure 7.The cross-section shown was cut just beyond the terminal strip for the primary coil tap jumpers.Two distinct coils are visible. Testing with an ohmmeter revealed that the first turn in the outer layer of each winding connects to NEETRAC Project Number 04-137,Final Report -September 20,2004 6 the H1 and H2 terminals respectively of the transformer.However,this view does not show anything about how the tap leads are brought out of the primary winding. EpoxyEncapsulant Fain Vaporized in this Area Path of Hot Plasma Loop across Layer Pattern Left to Crack in by Encapsulant Vaporized at Edge of Terminal 1 Coil Lead =ON Ee Figure 6:Pattern Left by Vaporized Terminal 1 Lead between 1"and 2™Layer of H2 Coil Strand to Strand to H2 Hl TerminalTerminal a g to HI and H2 Terminals FattFigure7:Cross-section of Primary Winding Showing Turns Leadinrae! NEETRAC Project Number 04-137,Final Report -September 20,2004 7 Figure 8 shows a cross-section of the coil assembly cut through the near side of the terminal strip for the primary coil taps.This cut is approximately 1-1/4 inches away from where the cut in Figure 7 was made and on the opposite side of the terminal strip for the tap jumpers.The cut goes through the area where the tap leads came up between the two primary coils.Close examination of the figure shows that lead 4 going to the tap in the H1 coil was sliced along the axis of the wire.This lead is visible traversing between the third and fourth layers of the winding on the left side of the photograph.At the very bottom inside edge of the coil is the strand of the winding that connects to terminal 2 of the jumper terminal strip.This lead marks the end of the H1 coil.On the right side of the figure are the corresponding leads for the H2 coil.The tap lead connects to terminal 3 of the jumper terminal strip and the strand from the end of the coil is visible at the inside edge of the coil, connecting to terminal 1 of the jumper terminal strip.The connection of each lead or wire turn within the coil was verified using an ohmmeter.The cross-section provides insight into the actual construction of the primary winding,its taps,and coils. Tap Lead to Terminal 4 Strand to Strand to Terminal 2 Terminal 1 Strand to Strand to Terminal 4 Terminal 3 2% 5%Sections of Coils Figure 8:Cross-section of Primary Winding Showing H1 and H2 Coils with Tapped Windings To further trace the leads to the jumper terminal strip,a cut was made between the H1 and H2 coils along the area where the leads came up between the coils.The resulting cross-section is shown in Figure 9.Again,each of the leads was traced using an ohmmeter.On the left side of the figure is the lead connecting from terminal 4 to the tap of the H1 coil.Next is the lead from terminal |to the bottom end of the H2 coil.The woven fiber tube surrounding the lead is intact,but the copper wire is vaporized except for a very small piece of wire near the bottom edge of the photograph where the lead turns toward the H2 coil.A crack is visible within the epoxy resin encapsulant running from the terminal 1 lead.The crack is filled with carbon and appears to have been created when the lead was vaporized in the fault.It is worth noting that the terminal 1 leads to turn into the H2 winding at the top edge of the epoxy encapsulant,leaving a hollow tube of woven fiber insulation.Adjacent to NEETRAC Project Number 04-137,Final Report -September 20,2004 8 Terminal 4 Terminal 1 this tube,the epoxy resin is vaporized,leaving an irregular shaped recess that extends beyond the terminal 2 lead.Comparison of the position of the hollow woven tube and the erosion of epoxy insulation with the pattern left by the vaporized lead in Figure 6 indicates that the terminal 1 lead was the lead that looped between the layers of the outer winding insulation. Terminal 2 Lead Lead Vaporized Epoxy Hollow Tube of Woven Insulation Lead Fracture through Epoxy Resin Figure 10 provides an enlarged view of the cut face across the H1 coil that is shown in Figure 8. The figure provides of clearer view of the terminal 4 lead as it connects,forming a tap of the H1 coil.The tap is in the third layer from the inside of the winding and is located 14 turns from the outer edge of the layer.The tap lead is surrounded by its woven fiber tube insulation and traverses across the layer to exit the coil at the inner edge,going into the space between the HI and H2 coils. The impregnated paper sheets providing insulation between the winding layers are visible within the epoxy encapsulant and extend approximately 3/16 inch beyond the edge of the last turn of copper wire within each layer.The white layer near the bottom edge of the figure is formed by impregnated,woven fiber sheets stacked around the inner surface of the winding.These impregnated fiber layers are also visible at the bottom edge of Figure 9 above and appear to form a layer of insulation and bedding on which the primary coils were wound. DISCUSSION /CONCLUSION Results of the teardown and physical examination revealed that a portion of the tap lead from the H2 coil of the primary winding was vaporized.This lead connects from the inner end of the H2 coil to the terminal marked 1 on the jumper terminal strip.Since the transformer was configured for nominal voltage operation,jumper terminals 2 and 3 were connected together.Terminals 1 and 4 were not externally connected,but were energized through the turns within the winding.Terminal 4 NEETRAC Project Number 04-137,Final Report -September 20,2004 9 would appear as a tap within the winding,resulting in approximately 1kV between terminals 2 and 4 of the jumper terminal strip based on the nominal ratings of the transformer winding.Similarly,the winding section between terminals |and 3 would act like an autotransformer,yielding a voltage of approximately 1kV between these two terminals. Terminal 4 Lead Strand to Terminal 2 Figure 10:Cross-section of H1 Coil Showing Tap Lead Routing Identification of the route followed by the terminal 1 lead after it exited the edge of the H2 winding provides the key to identifying the cause of this failure.Evidence indicates that the terminal 1 lead was routed from the bottom interior end of the H2 coil up through the space between coils.The lead was then bent over and looped between the first and second layers at the outer surface of the H2 coil. This may have been done to hold the lead in position although a specific reason for this configuration can only be conjecture.However,routing of a lead from the interior end of the coil into an area between outer layers of the same coil results in a significant voltage difference between the lead and the surrounding turns within the adjacent coil layers.The resulting voltage difference is approximately 6,575 volts based on the number of turns in each layer and the location within the coil.The thickness of the woven and epoxy insulation within this area is probably sufficient to withstand the resulting voltage for an extended period of time.None-the-less,the insulation is under high electrical stress and may be subject to partial discharge activity.Available evidence indicates that the insulation failed between the terminal 1 lead and the edge of the outer layer of the H2 winding.The resulting fault vaporized a section of the terminal 1 lead,producing the rupture visible in the side of the primary winding insulation.The routing of the lead represents either a quality control or a design problem,depending on the construction details specified in the transformer design drawings. NEETRAC Project Number 04-137,Final Report -September 20,2004 10 EQUIPMENT LISTING 1)Diamond Cut-off Saw 2)Band saw 3)Sony F707 5M Pixel Digital Camera REFERENCES AND STANDARDS LISTING ANSI C57.12.50,"Requirements for Ventilated Dry-Type Distribution Transformers,1 to SOOkVA, Single-Phase,and 15 to SOOkVA,Three-Phase,with High-Voltage 601 to 34 500 Volts,Low- Voltage 120 to 600 Volts.” ANSI C57.12.56,"Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers.” ANSI C57.12.58,Guide for Conducting a Transient Voltage Analysis of a Dry Type Transformer Coil.” ANSI C57.12.59,"Guide for Dry-Type Transformer Through-Fault Current Duration.” ANSI C57.12.91,"Test Code for Dry-Type Distribution and Power Transformers.” NEETRAC Project Number 04-137,Final Report -September 20,2004 11 APF Dry Type Transformer Failure Investigation For Chugach Electric Association,Inc.)NEETRAC Project Number:04-137 L C September,2004 Y \y4 geo 27seex2Re!TRAGAResearchCenterofthe%4 Appicoto™<Georgia Institute of Technologyooio”ey"Requested by:Charlie Kimmel Chugach Electric Association,Inc. Principal Investigator:_/eee c.SEGBEDThomasC.CamMpionReviewedby:Mabe,Rick A.Hartlein/ APF Dry Type Transformer Failure Investigation NEETRAC Project Number 04-137 SUMMARY Mr.Charlie Kimmel with Chugach Electric Association requested that NEETRAC determine the cause of failure for an epoxy encapsulated dry-type transformer manufactured by AFP Transformers, LLC,of Edison,New Jersey.The transformer is listed as an Epoxycast®product from the company's cast coil transformer series.Two identifying numbers were present on the side of the primary coil adjacent to the high voltage terminals.These numbers were 4104117 and 26815.The primary coil of the transformer is constructed of two series connected coils,each with one tap. Jumpers allow the coils and taps to be configured for a nominal primary voltage rating of 13.3kV + 7.5%.A single secondary coil provides a nominal output voltage of 277V. Visual examination and dissection of the primary coil revealed a dielectric puncture between the second layer of the primary coil connected to the H2 lead and the Jumper 1 lead running from the opposite end of the H2 coil to the terminal block.The Jumper 1 lead was looped under the second layer of the H2 coil,resulting in approximately 6,575 volts across the layer-to-layer insulation within the coil,which is considered excessively high for the short separation distance.The lead routing may have been done to fix the lead during the casting process.However,this routing represents either a design or a manufacturing quality control problem. INTRODUCTION /SCOPE Chugach Electric Association,Inc.experienced a failure on an epoxy cast,dry-type transformer manufactured by AFP Transformers,LLC,A United Capital Company in Edison,New Jersey.The failure resulted in a split in the side of the primary coil casting in the area between the H1/H2 terminal block and the 1,2,3,4 jumper terminal block.Three transformers of identical design are used in combination to provide three-phase service from a metal-enclosed switchgear installation. The connected load consists primarily of motors associated with air handling equipment used to maintain building temperature.The building involved houses a switched VAR compensator system used to maintain power system stability.Temperature within the building is relatively constant at 77°F. Figure 1 shows the condition of the transformer as received at NEETRAC.The transformer is a cast coil design referred to by the manufacturer as Epoxycast®.The unit involved is rated 10kVA,1 Phase,60 Hertz with a nominal primary voltage rating of 13,300V and a nominal secondary voltage rating off 277V.The transformer consists of a primary coil placed over an inner secondary coil. Both coils enclose one leg of a laminated steel core.A secondary terminal strip is mounted on the side of the steel core.Terminals for the primary coil and its taps are molded into the side of the primary coil.By changing the jumpers the primary coil can be configured for a primary voltage of +7.5%of the nominal coil voltage rating.Figure 2 shows the clear plastic tag attached to the side of the primary coil between the terminal sets that provides the nameplate data for the unit.The coil configuration is schematically displayed on the data tag.The manufacturer's part number for the transformer is 4104177 with a serial number of 757V-01.The failed unit was manufactured on September 18,2001. NEETRAC Project Number 04-137,Final Report -September 20,2004 1 meentac nme:Reet witsteacme Vie eee Figure 1:Cast Coil AFP Transformer As Received NEETRAC Project Number 04-137,Final Report -September 20,2004 2 a i: Rees eeRePeneee Le Se _: os Le Figure 2:Nameplate Data on mary Coil NEETRAC Project Number 04-137,Final Report -September 20,2004 3 PROCEDURE AND RESULTS Much of the outer coating of epoxy resin surrounding the transformer primary winding appeared to be soft and somewhat rubbery inconsistency.This offered a possibility that the epoxy coating could be removed at room temperature by simply slicing through the material without resorting to more extreme removal approaches.Removal of the encapsulating material would offer access to the windings and other internal details of the transformer construction,providing a simplified method of analyzing the cause of the failure. A sharp utility knife was used to cut through the encapsulating insulation in the area between the H1/H2 terminals and the terminals for the primary winding jumpers.This is the area where a carbonized split was visible in the side of the primary coil encapsulant as shown in Figure 1.Cuts were made to allow a wedge of encapsulating material to be removed.The cut ran along the inner edge of the H1/H2 terminal strip,down the side of the winding to the centerline of the split,across to the jumper terminal strip following the curvature of the coil edge,along the edge of the jumper terminal strip,and back along the other side of the coil edge.The wedge of epoxy was then pried away from the primary winding resulting in the view shown in Figure 3.This exposed the outer layer of two coils that formed the primary winding. Jumper Terminal Outer Strip Layer of i:Coil is :Partial i Width Full Width |of H2 Coil | Carbon Deposited between 1* nd Impregnated and 2 Paper Layer of H2 Insulation Coil a 2 :banat :oe :Moai r Overlying Insulation Removed al vider Anels Figure 3:Outer Layer of H2 Coil afte Each coil was wrapped using lacquered,round copper wire.The outer layer covered only part of the coil width,going approximately two thirds of the way across the coil from the inner edge.Figure 3 shows the H2 coil and its outer winding layer.The outer layer was undamaged and appeared to be in good condition with no evidence of arcing or dielectric puncture.Under the layer was a piece of resin impregnated paper that was part of the insulation isolating each layer of the winding.Portions NEETRAC Project Number 04-137,Final Report -September 20,2004 4 of the paper insulation were burned through revealing carbon covering the layer below.Examinationofthecarbonrevealedthatitwascoatingthesurfacebetweentwolayersofimpregnatedpaper insulation.Although the carbon covered much of the exposed area,the damage appeared to extend under the jumper terminals for the winding taps. To gain better access to the area of damage,cuts were made along both sides of the jumper terminal strip and across the ends.The terminal strip was then pried away from the body of the coil and folded back so that the terminal leads could be cut.Figure 4 shows the exposed and cut leads running from between the two primary coils out to the jumper terminals.On the right side of the figure is the H2 coil with the outer winding layer cut through and folded back.The H1 primary winding is on the left side of the figure.Using an ohmmeter,the individual leads were identified relative to the terminal strip markings and the schematic diagram of the winding assembly shown on the transformer nameplate.The two leads on the left side of Figure 4 were identified as connecting to terminals 2 and 4 of the jumper terminal strip.The two leads on the right side of Figure 4 were identified as connecting to terminals 1 and 3 of the jumper terminal strip.Each lead was surrounding by one or more tubes of woven fiber insulation.The insulation surrounding leads 1 and 2 exhibited evidence of damage with carbon coating the outer surface.The epoxy encapsulant surrounding these two leads was also cracked along the lead route with carbon covering the interior surface of the crack.Damage appeared to be most severe around the lead connecting to jumper terminal 1. Carbon Covered Crack in Terminals 1 Epoxy and 3 Leads Encapsulant Strip of Terminals 2 Woven and4Leads _Fabric Tape ;:Impregnated :Paper fs |Insulation be between Layers Figure 4:Cut Tap Leads Exiting Between Coils on Way to Terminal Block When the fabric tape at the inner edge of the H2 coil outer layer was removed,are damage to the last few turns at the edge of the layer was found as shown in Figure 5.The last four turns of the layerwereburnedintwowiththeareappearingtohavegonefromtheleadforjumperterminal1overto the edge of the coil.Although the woven fiber tube surrounding the lead from jumper terminal 1 into NEETRAC Project Number 04-137,Final Report -September 20,2004 5 the transformer coil appeared to be intact,probing with the tip of an ohmmeter probe revealed thatthecopperwirewithintheleadwasvaporizedonthesideleadingintothespacebetweenthecoils. Terminal 3 Lead Terminal 1 Lead Damage to Strands at Edge of H2 Coil seaesop : Figure 5: The final few strands of the H2 coil outer layer were cut in two so that the underlying layer of impregnated paper insulation could be sliced through at each end of the exposed coil section and removed.Removal of this insulation layer exposed the surface of another layer of impregnated paper insulation as shown in Figure 6.A large area across the surface of the layer was covered in carbon. A pattern looped across the surface that appeared to be the remains of a woven fiber tube similar to the one surrounding each of the tap leads running from the primary winding out to the jumper terminal strip.Remnants of the woven fiber tube remained,but the copper wire within the tube was completely vaporized.The loop appeared to extend out from the area where the 1 and 2 leads exited the space between the H1 and H2 coils,and then return to this area.The impregnated paper insulation layer within the bounds of the loop was burned away,exposing a third layer of impregnated paper insulation underneath.There was also a shiny area on the surface of the paper insulation near the point of closest approach to the outside edge of the H2 coil.This area appeared to mark a path where the plasma froma hot arc had traveled across the insulation surface and exited the epoxy encapsulant at the crack initially observed on the outer edge of the winding assembly. To get a better understanding of how the primary coil assembly was constructed,a diamond saw was used to cut a cross-section through the assembly as shown in Figure 7.The cross-section shown was cut just beyond the terminal strip for the primary coil tap jumpers.Two distinct coils are visible. Testing with an ohmmeter revealed that the first turn in the outer layer of each winding connects to the H1 and H2 terminals respectively of the transformer.However,this view does not show anything about how the tap leads are brought out of the primary winding. NEETRAC Project Number 04-137,Final Report -September 20,2004 6 Epoxy Encapsulant Vaporized in this Area Path of Hot Plasma across Layer to Crack in Encapsulant at Edge of Coil Figure 6:Pattern Left by Vaporized T Strand to H2 Terminal Loop Pattern Left by Vaporized Terminal 1 erminal 1 Lead between 1*and 2™Layer of H2 Coil a E ssaeee Strand to Hl Terminal PRE HERMON-See pndiisBASEFigure7:Cross-section of Primary Winding Showing Turns Leading to H1 and H2 Terminals NEETRAC Project Number 04-137,Final Report -September 20,2004 7 Figure 8 shows a cross-section of the coil assembly cut through the near side of the terminal strip fortheprimarycoiltaps.This cut is approximately 1-1/4 inches away from where the cut in Figure 7wasmadeandontheoppositesideoftheterminalstripforthetapjumpers.The cut goes through the area where the tap leads came up between the two primary coils.Close examination of the figure shows that lead 4 going to the tap in the H1 coil was sliced along the axis of the wire.This lead is visible traversing between the third and fourth layers of the winding on the left side of the photograph.At the very bottom inside edge of the coil is the strand of the winding that connects toterminal2ofthejumperterminalstrip.This lead marks the end of the H1 coil.On the right side of the figure are the corresponding leads for the H2 coil.The tap lead connects to terminal 3 of the jumper terminal strip and the strand from the end of the coil is visible at the inside edge of the coil, connecting to terminal 1 of the jumper terminal strip.The connection of each lead or wire turn within the coil was verified using an ohmmeter.The cross-section provides insight into the actual construction of the primary winding,its taps,and coils. Terminal 2 Terminal 1 Strand to Strand to Terminal 4 Terminal 3 Figure 8:Cross-section of Primary Winding Showing H1 and H2 Coils with Tapped Windings To further trace the leads to the jumper terminal strip,a cut was made between the H1 and H2 coils along the area where the leads came up between the coils.The resulting cross-section is shown in Figure 9.Again,each of the leads was traced using an ohmmeter.On the left side of the figure is the lead connecting from terminal 4 to the tap of the H1 coil.Next is the lead from terminal 1 to the bottom end of the H2 coil.The woven fiber tube surrounding the lead is intact,but the copper wire is vaporized except for a very small piece of wire near the bottom edge of the photograph where the lead turns toward the H2 coil.A crack is visible within the epoxy resin encapsulant running from the terminal 1 lead.The crack is filled with carbon and appears to have been created when the lead was vaporized in the fault.It is worth noting that the terminal 1 leads to turn into the H2 winding at the top edge of the epoxy encapsulant,leaving a hollow tube of woven fiber insulation.Adjacent to this NEETRAC Project Number 04-137,Final Report -September 20,2004 8 tube,the epoxy resin is vaporized,leaving an irregular shaped recess that extends beyond theterminal2lead.Comparison of the position of the hollow woven tube and the erosion of epoxyinsulationwiththepatternleftbythevaporizedleadinFigure6indicatesthattheterminal|lead was the lead that looped between the layers of the outer winding insulation. Terminal 2 Terminal 4 Lead Lead Vaporized Epoxy Hollow Tube of Woven InsulationeeTerminal1 Lead Fracture through Epoxy Resin ee nasilFigure9:Section across Tap Lead Area between H1 and H2 Coils Figure 10 provides an enlarged view of the cut face across the H1 coil that is shown in Figure 8.The figure provides of clearer view of the terminal 4 lead as it connects,forming a tap of the H1 coil. The tap is in the third layer from the inside of the winding and is located 14 turns from the outer edge of the layer.The tap lead is surrounded by its woven fiber tube insulation and traverses across the layer to exit the coil at the inner edge,going into the space between the H1 and H2 coils.The impregnated paper sheets providing insulation between the winding layers are visible within the epoxy encapsulant and extend approximately 3/16 inch beyond the edge of the last turn of copper wire within each layer.The white layer near the bottom edge of the figure is formed by impregnated, woven fiber sheets stacked around the inner surface of the winding.These impregnated fiber layers are also visible at the bottom edge of Figure 9 above and appear to form a layer of insulation and bedding on which the primary coils were wound. DISCUSSION /CONCLUSION Results of the teardown and physical examination revealed that a portion of the tap lead from the H2 coil of the primary winding was vaporized.This lead connects from the inner end of the H2 coil to the terminal marked 1 on the jumper terminal strip.Since the transformer was configured for nominal voltage operation,jumper terminals 2 and 3 were connected together.Terminals 1 and 4 were not externally connected,but were energized through the turns within the winding.Terminal 4 NEETRAC Project Number 04-137,Final Report -September 20,2004 9 would appear as a tap within the winding,resulting in approximately 1kV between terminals 2 and 4ofthejumperterminalstripbasedonthenominalratingsofthetransformerwinding.Similarly,thewindingsectionbetweenterminals1and3wouldactlikeanautotransformer,yielding a voltage of approximately 1kV between these two terminals. Terminal 4 Lead Strand to Terminal 2 Figure 10:Cross-section of H1 Coil Showing Tap Lead Routing Identification of the route followed by the terminal 1 lead after it exited the edge of the H2 winding provides the key to identifying the cause of this failure.Evidence indicates that the terminal 1 lead was routed from the bottom interior end of the H2 coil up through the space between coils.The lead was then bent over and looped between the first and second layers at the outer surface of the H2 coil. This may have been done to hold the lead in position although a specific reason for this configuration can only be conjecture.However,routing of a lead from the interior end of the coil into an area between outer layers of the same coil results in a significant voltage difference between the lead and the surrounding turns within the adjacent coil layers.The resulting voltage difference is approximately 6,575 volts based on the number of turns in each layer and the location within the coil.The thickness of the woven and epoxy insulation within this area is probably sufficient to withstand the resulting voltage for an extended period of time.None-the-less,the insulation is under high electrical stress and may be subject to partial discharge activity.Available evidence indicates that the insulation failed between the terminal 1 lead and the edge of the outer layer of the H2 winding.The resulting fault vaporized a section of the terminal 1 lead,producing the rupture visible in the side of the primary winding insulation.The routing of the lead represents either a quality control or a design problem,depending on the construction details specified in the transformer design drawings. NEETRAC Project Number 04-137,Final Report -September 20,2004 10 EQUIPMENT LISTING 1)Diamond Cut-off Saw 2)Band saw 3)Sony F707 5M Pixel Digital Camera REFERENCES AND STANDARDS LISTING ANSI C57.12.50,"Requirements for Ventilated Dry-Type Distribution Transformers,1 to 500kVA, Single-Phase,and 15 to 500kVA,Three-Phase,with High-Voltage 601 to 34 500 Volts,Low- Voltage 120 to 600 Volts.” ANSI C57.12.56,"Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers.” ANSI (57.12.58,Guide for Conducting a Transient Voltage Analysis of a Dry Type Transformer Coil.” ANSI C57.12.59,"Guide for Dry-Type Transformer Through-Fault Current Duration.” ANSI C57.12.91,"Test Code for Dry-Type Distribution and Power Transformers.” NEETRAC Project Number 04-137,Final Report September 20,2004 Jl 1(3) Copy to Urban Strandberg,ABB Huntley &Associates Attn:Chuck Huntley Anchorage,AK. Dealt with by Date Our reference Daniel Martinez,ABB Raleigh,NC OC 7383 US 08/29/2007 Price indication for the upgrade of the GE supplied SVCs in Alaska ABB proposes a replacement of the following equipment for the upgrade of these SVCs;the price estimate is made for 3 different alternatives. Scope: Alternative 1:Control upgrade only in one SVC a Control system -MACH2 -including: o HMI o Integrated Transient Fault Recorder (TFR) o Interface to existing and remaining GE thyristor valve Alternative 2:Control,thyristor valve and cooling system upgrade in one SVC Q Control system -MACH2-including: o HMI o Integrated Transient Fault Recorder (TFR) Q TCR valve , Q Cooling system (pump unit and cooling towers) Alternative 3:Control upgrade only,in three SVC Q Control system -MACH?-including: o HMI o Integrated Transient Fault Recorder (TFR) ©Interface to existing and remaining GE thyristor valves ABB and international standards (IEC)apply to the equipment above. ABB Inc. Postal &Visiting Address ABB Inc. Telephone E-mail +1919 8078289 daniel.martinez@us.abb.com 940 Main Campus Dr,Suite 300 ='Telefax http Raleigh,NC 27606 +1919 8075771 |www.abb.com/FACTS 2(3) Our ref:OC 7383 US The scope for the alternatives also includes: Q 0OAll engineering for the equipment included in the scope of supply Routine tests according to international standards Supervision of installation of new equipment Commissioning of installed equipment 3 days of on site training during commissioning ABB also assumes the following: Q The equipment listed above will substitute the existing equipment with equal functionality as today's equipment. No responsibility is taken by ABB regarding the functionality of the existing equipment. Re-commissioning of original (old)equipment is not included in the scope. ABB assumes that the existing auxiliary services are sufficient and can be re-used. No responsibility is taken by ABB for dismantled equipment. Transportation to warehouse,or other place outside the substation area,is not included. Operation and/or indication of circuit breakers and disconnectors on the transformer high voltage side remain the same after the modernization as prior. Cables in the SVC area are included in the scope,cables outside the SVC area (to circuit breakers/disconnectors etc)are however not included. ABB submits new documentation for the equipment included in the scope of supply.Alteration in existing documentation is not included. Warranty: One year of warranty is included Price indication: Price indication for the alternatives,equipment delivered CIF to site. Alternative 1:$1,000,000.00 USD Alternative 2:$1,500,000.00 USD Alternative 3:$2,600,000.00 USD 3(3) Our ref:OC 7383 US Payment conditions: 20 %Down payment 20 %Against delivery of preliminary documents 50 %CIF port of import 10 %PAC Commercial conditions: "ABB Inc.General Terms and Conditions of Sale -PSG After Sales”shall apply. Delivery time: Approximately 12 months (definite time schedule will be submitted in the tender) Validity: This proposal is not valid for sales.All prices are indicative and subject of change due to the extent of the scope. Confidentiality: The contents of ABB's Proposal (including prices and all commercial and technical information)are proprietary to ABB Inc.and its affiliates in the ABB Group.These contents should not be disclosed to any third part or otherwise used by the Customer for any purpose other than evaluation of this Proposal or in Contract negotiations with ABB. If you have any doubts or questions regarding this budgetary proposal,please do not hesitate to contact us. Yours sincerely, Daniel Martinez ABB Inc. Grid Systems NAM /After Sales Power Systems Division . ;AT,I$-@2 « James Strandberg From:James Strandberg Sent:Thursday,June 07,2007 10:24 AM To:Karl Reiche Cc:Brian Bjorkquist;Ron Miller;Sara Fisher-Goad Subject:FW:CWS Fence Project The fence replacement project for the Cantwell substation came up at the recent l1OC Maintenance Subcommittee meeting.In my opinion,fences around our HV transmission substations are risk concentrations for us.The Cantwell site is somewhat complex,due to snow drifting issues and land ownership issues.GVEA had secured a price from a Fairbanks fence contractor on the basis of replacing existing fence,which had been designed by Gilbert Commonwealth originally.There were no design documents. |told GVEA in the last IOC maintenance committee meeting (yesterday),that |wanted to see an actual design and code analysis on the enclosure.(Codes change over time.)Also they were only bidding out of Fairbanks.|told them to open the bidding up to both Anchorage and Fairbanks. This is approach |am taking on all projects for the intertie,which reflects maximum utility control,but with an appropriate level of direction and monitoring to protect ownership interests.|will be travelling up there this month to review the situation with GVEA. Regards,Jim From:James Strandberg Sent:Thursday,June 07,2007 10:10 AM To:'Richard J.Piech' Cc:Henri F.Dale;Tim R.DeVries;Mike J.Wright;Frank Bettine -MEA;Charlie Kimmel;halldw@ci.anchorage.ak.us Subject:RE:CWS Fence Project Let's talk with Henri on the matter first part of the week.Perhaps we can get Charlie Kimmel in with us.|want to make sure that the fence enclosure complies with current codes,there is a reasonable design document to bid from,and there is a competitive bidding process.From AEA's standpoint,we need a traceable process that demonstrates the enclosure complies with current safety codes/standards,and is a reasonable long term solution.GVEA should accomplish the work,with AEA review,and concurrence from the maintenance committee.In-house design or outside consultant design is a GVEA decision.Bids should be accepted from throughout the Railbelt. That is my initial blush input on the project,but do want to talk through the project with you,Henri and Charley to make sure we get it right. Regards,Jim From:Richard J.Piech [mailto:RJPiech@gvea.com] Sent:Thursday,June 07,2007 9:46 AM To:James Strandberg Ce:Henri F.Dale;Tim R.DeVries;Mike J.Wright;Frank Bettine -MEA;Charlie Kimmel;halldw@ci.anchorage.ak.us Subject:CWS Fence Project Good Morning Jim, Per our discussion on the Cantwell Substation Fence yesterday,you want a specification/design (spec)for the replacement on the fence.We are looking to see if we can do it in house or if we need to contract this work out. Onte a'spec is complete though;|understand you (the state)will review the spec ana determine if it meets the state's standards.If it meets standards then who is going to develop the contract,put it out to bid,and perform project management functions? |also understand that you will discuss this project with Henri next week.Do you want to hold off on any decisions/discussions until then? Rich Rich Piech Operations Manager GVEA Inc. 907-451-5686 758 Illinois St. Fairbanks Ak.99707 rjpiech@gvea.com Fax -907-458-6374 AL 134-2 Intertie Maintenance Subcommittee Meeting Notice and Agenda The IOC Maintenance Subcommittee meeting is scheduled for Tuesday June 5,2007 at 1:30 pm at the AIDEA Headquarters,in Anchorage. Tentative Agenda: 1.Status on the Inset Towers for the Intertie 2.Status on the SLMS activities 3.Update on Condition of Str 274 and 297 Foundations 4.Maintenance and Patrol Updates for the Intertie 5.Status on the IOC funding for the SVC Upgrades and (2)Transmission structure foundations 6.Open Agenda 7.Date and time for the next meeting Please do not hesitate to contact me if anyone wishes to add or modify this agenda. Thanks Charlie Kimmel Manager,Substation Operations,CEA 907-762-7661 ;AL [3-% IOC Maintenance Subcommittee Meeting Minutes June 5,2007 The maintenance subcommittee met this date at the AIDEA complex on Arctic Blvd., Anchorage,Alaska.Those attending were Doug Hall,Jim Strandberg,Richard Piech(teleconferenced),Del LaRue and Charles Kimmel.Frank Bettine was unavailable. The meeting began with an update of maintenance and corrective activities since the last Subcommittee meeting in February 6,2007. Inset Tower Project The committee agreed that discussion on this item with this committee should be suspended until we receive direction from the IOC to proceed with the project.Our recommendations and proposals for repairs have been presented to the IOC with various options and estimates in the past. SVC and Transmission Line Activities Since the meeting on February 6 and the date of this meeting,there were no reported problems with any of the SVC's.The Northern section of the Intertie maintained by GVEA was patrolled and no problems were found.GVEA reported no updates on the repairs at Tower 692.Hopefully late summer or fall bids will be sent out again for possible repairs.No status reports were available for the Southern section. GVEA advised they were going to go out for bids to replace the Cantwell Substation fence.Jim Strandberg advised the project must meet current NESC specifications and asked GVEA to provide the contractor/bidders such specification.Further,Jim asked that the invitation to bid be advertised so that contractors throughout the railbelt area have an opportunity to submit a bid. Snow Load Monitoring System Del LaRue advised that the last six panels have been installed and are in service.All panels are currently operational. ACS advised one of the members that the analog cell phone service providing communications to this system would be terminated after October 1,2007.No other source of analog service exist.Del was asked to look into a short-term solution until a long-term dependable communications medium/company is found.He will submit a proposal to Jim Strandberg for this need to cover all 22 sites. Del LaRue expressed concern that the reporting of snow conditions does not kick off until December 1.He advised that the snow season begins some years as early as October 1 and could extend through April 30.He recommended we reset the .patrolling/reporting window to these dates. One outstanding issue was the need to have a DC supply to one of the SLMS devices that is adjacent to Stevens Sub.In previous meetings,Frank Bettine with MEA,advised he would look into this matter and thought it could be resolved with little difficulty.One committee member asked if a Webcam could be installed as well. Tower 274 and 297 Foundation Repairs The maintenance contractor for the southern segment of the transmission line,MEA,was not present at the meeting so no new information was presented.Doug Hall advised the utilities were reluctant to spend any money on these repairs since notification was received from AIDEA/AEA of the cancellation of the Intertie agreement in the next couple of years.As a result,this committee took no action on this item and all concurred not to make any further recommendations for repairs until direction was received from the IOC. Right-of-Way Clearing The committee did not discuss this subject at this meeting. New Business None was discussed. Open Agenda The field trip to Talketna to look at the stored materials is planned hopefully in July.Jim Strandberg and Charlie Kimmel to schedule Next Meeting(s) None was scheduled.After the July 19,2007 IOC meeting,a decision will be made when to hold the next meeting. falIOC Maintenance Subcommittee Meeting Minutes February 6,2007 The maintenance subcommittee met this date at the AIDEA complex on Arctic Blvd., Anchorage,Alaska.Those attending were Doug Hall,Frank Bettine,Jim Strandberg, Richard Piech(teleconferenced),Del LaRue and Charles Kimmel The meeting began with an update of maintenance and corrective activities since the last Subcommittee meeting in August of 2006. SVC Activities At the Teeland SVC,the SVC went off line in November of 2006.A cold temperature alarm was reported by MLP dispatch.The problem was traced to an outside louver that supplies outside air through the SVC room stuck in the open position.At the time,the ambient temperature was below zero thus cooling the room below the low limit causing the shutdown.Concurrently,the Healy SVC went off line due to faulty secondary supply cables.Both were repaired within 24 hours and the SVC's brought back on line. _The Teeland SVC main transformer,the 138kv breaker,the two 13.8kv breakers and the capacitor bank were thoroughly inspected by a contractor in the summer of 2006 by Electric Power Systems.All were found in good condition for continued use.A couple capacitors had minor leaks.A copy of the report is included with these minutes. Richard Piech (Would you add a brief report of any maintenance work you may have performed since our last meeting.You indicated three events at Goldhill and four events at Healy) Under a separate transmittal,Charlie Kimmel and Richard Piech will prepare a report of the type of thyristers currently installed in each of the three SVC's.Further,this report will advise the type of spare thyristers that are stored at each location. Inset Tower Project There has been no changes or additions to this project since our last meeting.It appears the project will not move forward at his time. Snow Load Monitoring System The SLMS is still working pretty much as expected.A study by Power Engineers advised the number of patrols could be cut back but the committee agreed to leave the patrols process as is and not make any changes. tet Frank Bettine was asked if he would check into the possibility of supplying the SLMS device adjacent to Stevens Substation with a DC supply.He agreed. Del LaRue advised that the planned PV panel installation for 2006 had been completed. He also advised that the approval to install (6)additional PV panels has been approved. These six installations will complete the PV panel project.The procurement and installation of these panels was awarded to Norcon.Del will forward the schedule for these six panels at a later date. A discussion was held regarding the future direction of the SLMS project.The current direction indicates we are going to continue the use of this system.Discussed were two items that we should pursue with the IOC. We have several used and unused batteries that are out of date or are at end of life that require disposal.Del will look into proper disposal(using a qualified contractor)of the batteries that are out dated. The second item involved the industry evolution of other communication medias to replace the current cell phone system now in use.We recommend that this subject be forwarded to the SCADA operations committee for further input and development.The SCADA committee is looking into other communication options and maybe the SLMS can fit in with this research. Tower 274 and 297 Foundation Repairs Frank Bettine advised that they had a contractor inspect the condition of these foundations in August of 2006.They did not report any significant changes.Del LaRue prepared a design a few years ago to make repairs.That report also included a cost estimate.This estimate assumed that a large helicopter would be in the area doing other line construction projects and could be utilized for this project per the helicopter firm.As we are now possibly going to incur the mobilization costs for a large lift helicopter to this area,the committee asked Del to provide a revised estimate for this project inclusive of all cost adjustments that would impact this project. Right-of-Way Clearing The committee did not discuss this subject at this meeting. New Business Rich Piech advised that TWR 697 was failing and a project was under way to make repairs.The design is complete however GVEA did not receive any bids for construction.They are attempting to negotiate this project with Norcon.The engineers estimate is $300,000. Frank Bettine advised that a large number of marker balls need replaced.He is pursuing a contract with a helicopter firm to do these replacements.(Frank ,if you have any more to add,please feel free to do so.) Frank also advised that the climbing inspections for the southern section should be complete by the end of March 2007. Open Agenda Charlie Kimmel advised that the spare reels of 954 mcm cable stored at Talketna are in need of attention.These reels are constructed of wood and are badly deteriorated.The cable needs to be rewound on metal reels before they are so badly damaged they cannot be handled.Jim Strandberg advised that the stored material was the responsibility of the AEA and that he would look into the matter.Charlie Kimmel offered assistance with this issue.A field trip is planned this spring to investigate these reels and other stored materials. Next Meeting(s) The next scheduled meeting is June 5,2007 at 1:30pm at the AIDEA office in Anchorage Message Page 1 of 2 PE (-(3-L oo James Strandberg From:Richard J.Piech [RJUPiech@gvea.com] Sent:Wednesday,October 18,2006 11:38 AM To:Charlie Kimmel Ce:halldw@ci.anchorage.ak.us;James Strandberg;Frank Bettine Subject:RE:August 3,2006 Meeting Minutes Charlie, Here is our Thyristor inventory. HLS SVC-1 each GR-4 GHS SVC-1 each LR-11R 1 each GR-4 Rich From:Richard J.Piech Sent:Tuesday,October 17,2006 8:41 AM To:'Charlie Kimmel' Ce:'halldw@ci.anchorage.ak.us';"Jim Strandberg';'Frank Bettine' Subject:RE:August 3,2006 Meeting Minutes Good Morning Charlie, |understand that the fiber went out yesterday between Anchorage and Fairbanks,so I'm resending this to you. Also Jim,the offer still stands if you want to fly in the helicopter next week,just let me know when. Thanks Rich From:Richard J.Piech Sent:Monday,October 16,2006 3:49 PM To:'Charlie Kimmel' Cc:halldw@ci.anchorage.ak.us;Jim Strandberg;Frank Bettine Subject:RE:August 3,2006 Meeting Minutes Charlie,here is my info.from our Aug meeting. Jim,if you would like to fly with us to look at the Intertie next week,please let me know. Thanks 10/19/2006 Message¢1 Page 2 of 2 Rich Piech Operations Manager GVEA Inc. 907-451-5686 From:Charlie Kimmel [mailto:Charlie_Kimmel@chugachelectric.com] Sent:Wednesday,August 23,2006 8:21 AM To:Richard J.Piech;halldw@ci.anchorage.ak.us;Jim Strandberg;Charlie Kimmel;Frank Bettine Cc:Del LaRue Subject:August 3,2006 Meeting Minutes Would you please review the attached draft and advise your comments or concurrence?When I have heard from all of you,|will formalize the minutes and send them out. Thanks Charlie Kimmel 10/19/2006 Intertie Maintenance Subcommittee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for Thursday August 3,2006 at 10:00 am at the AIDEA Headquarters,374 Floor Conference Room in Anchorage. Tentative Agenda: 1.Update on SVC Outages and Repairs 2.Status on the Inset Towers for the Intertie 3.Status on the SLMS activities 4.Update on Condition of Str 274 and 297 Foundations 5.Maintenance and Patrol Updates for the Intertie 6.Status on the IOC funding for the SVC Upgrades and (2)Transmission structure foundations GA.f2oy)Chem ranra,7.Open Agenda 8.Date and time for the next meeting Please do not hesitiate to contact me if anyone wishes to add or modify this agenda. Thanks Charlie Kimmel Manager,Substation Operations,CEA 907-762-7661 T-UIv20/2/9 2/3 /o & ;WMaerntenanee AwlCllectricPowerSystems: Consulting Engineers Alaska Industrial Development &Export Authority August 1,2006 813 West Northern Lights Blvd. Anchorage,Alaska 99503 Subject:Budgetary Estimate for SVC Controls Upgrade Attention:Mr.Jim Strandberg Mr.Strandberg: Electric Power Systems,Inc.("EPS”)has updated the budgetary estimate for the for the three different options under consideration to upgrade or replace the SVC controls on the northern intertie at the Gold Hill,Healy,and Teeland substations.This cost is in addition to the costs associated with the operating utility at each site or the administration costs of the AEA.The costs are outlined as follows: Option 1 -SVC Controls Replacement Only We have assumed a 6 day work week at 10 hours per day.It is estimated that it will take 4 weeks per site and require two technicians from the construction contractor.The estimate also includes the cost of a construction manager and inspector.A per diem charge of $150.00 per day for each work day is included for each technician.Travel expense is included for each work day at Teeland and Healy.The travel and per diem costs of the equipment vendor is included in the vendor costs. Construction Contractor Labor =$65,640.00 Per Diem =$7,200.00 Travel =$1,350.00 Construction Manager =$18,400.00 Inspector =$25,600.00 Miscellaneous Material =$10,000.00 Vendor Equipment &Labor =$928,000.00 Contingency @ 20%=$210,998.00 Total per site =$1,267,188 Grand Total for 3 sites =$3,801,564 Option 2 -SVC Controls Replacement &Thyristor/Cooling Upgrade We have assumed a 6 day work week at 10 hours per day.It is estimated that the SVC controls replacement will take 4 weeks per site and require two technicians from the construction contractor and four technicians for the thyristor and cooling replacement that will require three weeks.The cooling and thryristor replacement is estimated to require an additional 3 weeks on site,with the AIDEA contractor supplying 2 men for the entire period.The estimate also includes the cost of a construction manager and inspector.A per diem charge of $150.00 per day for each work day is included for each technician.Travel expense is included for each work day at Teeland and Healy. PHONE (907)522-1953 *3305 ARCTiC BLVD.,SUITE 201,ANCHORAGE,ALASKA 99503 *FAX (907)522-1182 *WWW.EPSINC.COM PHONE (907)789-2474 *2213JORDAN AVE,JUNEAU,ALASKA 99803 *FAX (907)789-4939 The travel and per diem costs of the equipment vendor is included in the vendor costs. Construction Contractor Labor Per Diem Travel Construction Manager Inspector Miscellaneous Material Vendor Equipment &Labor Contingency @ 20% Total per site Extra mobilization costs due to project duration Grand Total for 3 sites $199,798.00 $33,000.00 $2,250.00 $29,040.00 $42,500.00 $10,000.00 $1,576,000.00 $378,518.00 $2,271,106.00 $125,000.00 $6,938,317 Option 3 -SVC Controls Replacement &Thyristor/Cooling Upgrade &Relaying Upgrade We have assumed a 6 day work week at 10 hours per day.It is estimated that the SVC controls replacement will take 4 weeks per site and require two technicians from the construction contractor and four technicians for the thyristor and cooling replacement and three technicians for four weeks for the protection upgrades.The cooling and thryristor replacement is estimated to require an additional 3 weeks on site,with the AIDEA contractor supplying 2 men for the entire period.The estimate also includes the cost of a construction manager and inspector.A per diem charge of $150.00 per day for each work day is included for each technician.Travel expense is included for each work day at Teeland and Healy.The travel and per diem costs of the equipment vendor is included in the vendor costs. Construction Contractor Labor Per Diem Travel = Construction Manager Inspector Miscellaneous Material Engineering As-builting As-built documentation (manual ugrades etc) Vendor Equipment &Labor Contingency @ 20% $278,278.00 3 79,800.00 $2,250.00 $43,740.00 $57,800.00 $35,000.00 $35,000.00 $95,000.00 $8,000.00 $1,576,000.00 $442,173.00 Total per site =$2,653,042 Extra mobilization costs due to project duration =$125,000.00 Grand Tota!for 3 sites =$7,557,014 If you have any questions or comments,please feel free to contact me at your convenience at 646- 5103 Sincerely, David W.Burlingame,P.E. Principal Engineer TOWER NO.274 FOUNDATION MONITC.,JING Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 18-Jul-03 Oct-04 4-Oct-05 MEA with Measured By:GDH GDH GDH MEA MEA PMW Distance,D1 ------ Distance,D2 ------ Distance,D3}50.85 ft 50.82 ft 50.85 ft 50.85 ft 50.85 ft.51.0 ft. Difference in Base Elev.|0.50 ft.-1.30 ft.625 ft.6.375 in.?|6.5 in.? Guy Tension,Ahd (North)snug snug snug snug snug loose Guy Tension,Bk (South)snug snug snug snug snug loose WEST FOUNDATION Slope,E.-W.|0.0 deg 0.0 deg 0.0 deg 0.0 deg 3.0 deg.1.0 deg. Slope,N.-S.(North low)}3.0 deg 3.0 deg 3.0 deg 5.0 deg 3.0 deg.2.0 deg. Anchor Bolt Slippage,W1 1.3 in 1.5 in.1.5 in 1.75 in 2.0 in.2.0 in. Anchor Bolt Slippage,W2 1.5 in 1.6 in.1.8 in 2.0 in.2.25 in.2.375 in. Anchor Bolt Slippage,W3 0.4 in 0.5 in.0.5 in 0.5 in.0.375 in.0.5 in. Anchor Bolt Slippage,W4 0.0 in 0.0 in.0.0 in 0.0 in.0.0 in.0.0 in. EAST FOUNDATION Slope,E.-W.(East low)|2.0 deg 2.5 deg.2.5 deg.3.0 deg.0.0 deg.3.0 deg. Slope,N.-S.(North low)|11.0 deg.11.5 deg.11.0 deg.11.0deg.|13.0 deg.|12.0 deg. Anchor Bolt Slippage,E1 5.7 in.5.8 in.5.9 in.6.375 in.6.625 in.6.625 in. Anchor Bolt Slippage,E2 7.6 in 7.9 in.8.0 in 8.75 in.9.125 in.9.25 in. Anchor Bolt Slippage,E3 7.3 in 7.4 in.7.6 in 8.5 in.9.0 in.9.125 in. Anchor Bolt Slippage,E4 5.3 in 5.1 in.5.3 in 6.125 in.6.625 in.6.563 in. TOWER NO.297 FOUNDATION MONITORING Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 18-Jul-03 11-Oct-04 4-Oct-05 MEA with Measured By:GDH GDH GDH MEA MEA PMW Distance,D1|23.10 ft.22.80 ft.23.00 ft.22.75 ft.22.875 ft.|22.875 ft. Distance,D2]24.50 ft.24.60 ft.24.70 ft.24.68 ft.24.5 ft.24.75 ft. Distance,D3}47.53 ft.47.40 ft.47.62 ft.47.33 ft.47.0 ft.47.5 ft. Difference in Base Elev.|-1.65 ft.1.60 ft.1.60 ft.1.0 ft.0.86 ft.0.92 ft Guy Tension,Ahd (North)loose loose loose loose loose very loose Guy Tension,Bk (South)snug snug snug snug snug loose WEST FOUNDATION Slope,E.-W.(East low)|_1.5 deg.1.5 deg.1.5 deg.1.0 deg.0.0 deg.0.0 deg. Slope,N.-S.(North low)|_1.0 deg.1.5 deg.1.5 deg.1.0 deg.2.0 deg.3.0 deg. .Anchor Bolt Slippage,W1 0.2 in.0.2 in.0.2 in.4.0 in.?0.125 in.0.25 in. Anchor Bolt Slippage,W2 0.0 in.0.0 in.0.0 in.0.0 in.loose loose Anchor Bolt Slippage,W3 loose loose loose loose loose 0.5 in. Anchor Bolt Slippage,W4 0.8 in.0.8 in.0.8 in.0.75 in.0.75 in.0.875 in. EAST FOUNDATION Slope,E.-W.(East low)|2.0 deg.2.0 deg.3.0 deg.1.0 deg.1.0 deg.0.0 deg. Slope,N.-S.(North low)|11.0 deg.12.5 deg.13.5 deg.15.0 deg.|14.0deg.|16.0 deg. Anchor Bolt Slippage,E1 3.6 in.3.8 in.3.6 in.4.0 in.4.125 in.4.5 in. Anchor Bolt Slippage,E2 0.0 in.0.0 in.0.0 in.0.0 in.0.0 in.0.0 in. Anchor Bolt Slippage,E3 0.0 in.0.0 in.0.0 in.0.0 in.0.0 in.0.0 in. Anchor Bolt Slippage,E4 1.5 in.1.3 in.1.3 in.1.25 in.4.25 in.1.375 in. Dryden LaRue,Inc. aS,yden é LaRue,Inc. CONSULTING ENGINEERS Location:6436 Homer Drive,Anchorage,Alaska 99518 Mailing Address:P.O.Box 111008,Anchorage,Alaska 99511-1008 Phone:(907)349-6653 *Fax (907)522-2534 Email:drydenlarue@micronet.net August 24,1999 Mr.Stan Sieczkowski ALASKA ENERGY AUTHORITY 480 West Tudor Road Anchorage,Alaska 99503 Reference:Anchorage to Fairbanks 345 kV Intertie; Foundation Movements On August 9,1999,Del LaRue and Greg Huffman of our office accompanied you via helicopter to the Chunilna Ridge area of the Anchorage to Fairbanks 345 kV Intertie.The purpose of our trip was to evaluate the movement of foundations at Towers #274 and #297.Both these towers have the same type of foundations,and have their downhill foundation (the one with the greatest reveal) experiencing significant settling,rotation and lateral movement.Following is a summary of our findings and a discussion of probable causes and solutions. Findings of Site Visit and Review of Construction Records We first visited Tower #297.Its downhill or right foundation was installed with three one-foot blocks.Foundations and bolts are designated left or right as one looks ahead line towards Fairbanks.This foundation has obviously settled,rotated and shifted away from the tower's original centerline.The two left rock bolts on the right foundation have popped up and are no longer bearing against the blocks.The centerline hub is still in place at this tower.We took measurements with hand instruments and compared them with the construction records.We found the base plate of this foundation has moved approximately 23 inches away from the centerline, sank approximately 20 inches in relation to the left foundation,and has rotated about 11°ahead and 2°right.The nut on the left,ahead bolt is about 3-5/8 inches above its bearing plate and the nut on the left,back bolt is about 1-1/2 inch above its bearing plate.Only about 6 to 12 inches of block is below groundline.A void exists on the left side of the foundation where it was originally installed.We could reach down under the blocks and feel the back,left rock bolt bent in double flexure (S curve).No grout or casing was present around the bolt.A piece of unmixed resin ALASKA ENERGY AUTHORITY August 24,1999 Mr.Stan Sieczkowski Page 2 cartridge,still in its liner,was pulled from the bolt hole underneath the blocks.Pieces of PVC pipe,likely used for casing,were found at the bottom of the void along with pieces of rock and cement grout. The left foundation appeared in good condition although there is a slight gap between the nut and bearing plate on both of the left rock bolts.Moss is growing in these gaps,suggesting the gaps have been open for a long time.Measurements taken on the left foundation showed its base plate has moved approximately 5 inches away from the centerline,and rotated approximately 1°ahead and 1.5°left.Approximately 3 inches of the two-foot block is above ground at this foundation, which has two feet of block. The structure as a whole is leaning to the right and appears somewhat rotated.The left shield wire suspension is swung noticeably ahead,and the right shield wire suspension is swung some,but not as much,back.The spiral damper on the left shield wire appears to be unraveling or is damaged. We flew back to Tower #296,landed and checked its foundations,which are of the same type as #297.We found its foundations in good shape with all rock bolt nuts still snug against the bearing plates.This tower has two and three one-foot blocks at its foundations,and the largest reveal was about six inches. Next we flew to Tower #274.This tower has had known problems for a while.Movement of its downhill or right foundation were apparent a few years after construction.A cable and turn-buckle were tensioned between the two legs in 1986 to try to minimize lateral movement.We found photographs of this foundation taken in May of 1991. We found the cable connecting the two legs to be very tight.The right foundation was constructed with three two-foot blocks.Approximately 4.5 to 5 feet of block is above ground.No centerline hub was found at this tower.Leg base spacing was measured and compared to the construction records.The leg spread was found to be about 20 inches greater than when the tower was erected, although it is not clear from the construction records if the measurements were taken at the same points of the tower base.The right foundation has settled about six inches in relation with the left foundation,and is rotated 2°ahead and 11°right.All of the rock bolts have popped up out of the blocks.The gaps measured between the nuts and bearing plates are 5-5/8 inches,7-5/8 inches,7- 1/4 inches,and 5-1/4 inches respectively for the left ahead,right ahead,right back,and left back bolts.These gaps are several inches greater than the gaps shown in the 1991 photograph. The left foundation is in better condition.About 3 inches of the 24 inch concrete block is out of the ground.It has about a 3°rotation ahead,but is level in the transverse direction.Three of its four rock bolts have gaps between their nuts and bearing plates.They are 1-1/4 inch,1-1/2 inch and 3/8 inch respectively for the left ahead,right ahead,and right back bolts. ALASKA ENERGY AUTHORITY August 24,1999 Mr.Stan Sieczkowski Page 3 On our flight back,we flew low and slow past several other towers.We noticed a tilt on the downhill or left foundation of Tower #251.We landed and measured a 3.5°rotation left of the left leg base.The concrete blocks had a greater rotation,and a review of the construction records found that the blocks were installed 5%from level,which is equivalent to about 3°of rotation. Both of the left rock bolts have about 1 inch of gap between their nuts and bearing plates.Both right rock bolts are snug.About half of the four foot of block is exposed above ground. The right foundation of Tower #251 appeared level.The top of its two foot blocks is a few inches above ground.Both right rock bolts have small gaps between their nuts and bearing plates.Both left bolt nuts are snug against the plates. Foundation Design and History The following description of the foundation is based on a review of construction drawings and records.We do not know how the foundations were actually constructed. The foundations were constructed in the fall of 1983 and towers were set and wires installed by the following summer.The multi-block foundation used at all of the sites visited (Type AR2 on the construction documents)is predominant along Chunilna Ridge.It consists of four grouted rock bolts anchoring three foot square concrete blocks at each leg.The base of the tower leg is anchored to the concrete blocks with four anchor bolts.The concrete blocks were precast in one or two foot thick units.The grade leg,typically the up-slope leg,uses blocks totaling two feet thick.The other leg uses between two and six feet of blocks as required to achieve the desired leg base elevation.This foundation was specified to have the sections of the rock bolts between the rock and blocks cased.The blocks were specified to be keyed at least 12 inches into till,talus or gravel material to provide lateral support.The design required the rock bolts to be proof loaded to 48,000 pounds each and pre-tensioned to 30,000 pounds each.Proof loading was likely done to verify the holding capacity of the individual rock anchors. The purpose of pre-tensioning was to pre-load the supporting materials between the block and rock in compression.A fast setting grout was installed in the rock and slow setting grout used inside the casing and through the blocks.The pre-tension load was applied after the fast setting grout hardened but before the slow setting grout hardened.When the slow setting grout hardened,a completely grouted pre-tensioned rock bolt should exist.As tower loads act downward on the foundation,the pre-tension load in the rock bolt is relieved but the net pressure below the blocks remain at their pre-tension value as long as the external forces do not completely relieve the pre- tension load in the rock bolt.If the external forces are such that they do completely relieve the pre- tension load in the rock bolt,the forces below the blocks will begin to exceed the pre-tension loads.This additional load would be supported by the soils or the grouted bolt. ALASKA ENERGY AUTHORITY August 24,1999 Mr.Stan Sieczkowski Page 4 We do not believe it was the designer's intention to have the casing below the blocks support load. If the casing diameter was larger than the bolt holes in the blocks,it is not clear from the construction records how or if the casing was prevented from supporting the blocks and the pre- tension load. If the casing did not support the pre-tension load,the soils below the blocks would have a 13,300 psf pre-tension pressure after the four bolts were pre-tensioned to 30,000 pounds each. Vertical loads applied to the foundations without lateral loading are uniformly resisted by the supporting material below the blocks.Lateral loads applied to the top of the foundation cause the distribution of resisting forces to shift such that the centroid of the resisting forces has the eccentricity necessary to counter act the overturning moment from the lateral force.This causes the resisting forces on one side of the foundation to increase while the other side decreases.The overturning moment depends on the magnitude of the lateral force and the unsupported length to the resisting forces. A review of the inspector's punch list items for this project noted some rock bolt nuts were loose ten months after the foundations were installed.This may have been an early indication of the movement problems we are now seeing.However,the nuts and bearing plates are not needed to hold the pre-tension loads if the grout has sufficiently hardened around the bolts,and the nuts may have been backed off to inspect or finish grout installation,or to coat the bolts and hardware. Likely Causes of Problems The primary cause of the foundation problems is that the soils on the sides and below the concrete blocks were inadequate to support the loading.A secondary cause is that the grout around the rock bolts below the blocks couldn't resist the bending and crushing forces. The design appears to rely on a very good soil below the blocks to support the 13,300 psf pre- tension load and at least 12 inches on the side of the blocks to resist lateral load.However it appears that during construction the elevation of the bottom of the blocks was set more to maintain the geometry of the tower and terrain than on finding good bearing material.We would characterize the upper soils from our field review as organic and soft silts.Construction borings taken at the tower sites describe the upper soils as tundra moss and saturated,silty sand.Some of the foundations we saw were likely keyed less than 12 inches into this poor soil when installed. Foundations using several feet of block with poor or no lateral soil resisted will have large overturning moments below the blocks.These overturning moments will cause high concentrations of vertical stresses on outer edges or the supporting material below the blocks.For example,if a 120,000 pound vertical load is applied to the center of the foundation without any lateral load, ALASKA ENERGY AUTHORITY August 24,1999 Mr.Stan Sieczkowski Page 5 the soil pressure below the blocks would be an uniform 13,300 psf.This assumes the casing or grout column below the block does not support any load.Now if a 10,000 pound lateral load is applied to the top of the foundation in addition to the vertical load,and there is six feet of unsupported length to the bottom of the blocks,the soil pressure on one edge of the blocks would reduce to zero,but the pressure on the opposite edge would increase to 26,600 psf.If the casing and/or grout column supports the load,the shift of stresses would be even more dramatic since they're spaced closer than the edges of the block. If the soils below the blocks didn't have the strength to support stresses in excess of the pre- stresses,these stresses would be resisted by the grouted bolt if the grout held.If the grout below the blocks crushed or spalled away and the grout bond within the blocks failed,the blocks would slip down the bolts.This is what we believe has happened everywhere we found gaps between the bolt nut and bearing plate. The likely failure scenario is that the soils on the side of the foundation were insufficient to resist - the lateral loads,causing high stress levels below the blocks.There was insufficient resisting material below the blocks to prevent the rock bolts from bending and the blocks from settling.The grout around the bolts below the blocks probably failed due to poor construction,weathering factors,or excessive stresses.The grout inside the blocks slipped around certain bolts,causing further differential and total settlement. Our conclusion is supported by the facts that all foundation that have transverse rotations are leaning in the direction of the predominant lateral load,i.e.away from the center of the tower,and that the worst problems are occurring at the foundations with the biggest reveals. Another factor that may be affecting the foundations movements is the possible loss of pre-stress forces in the soils due to ice-rich soils or ice lens thawing.Seasonal freeze-thaw cycles may also have exerted forces on the foundation and/or degraded the grout. Solutions If nothing is done at Tower #297,we believe its foundation will continue to move and eventually cause an irreversible structure failure.The first action we would recommend for this tower is to tie the two leg bases together with cable and a turnbuckle,similarly to what was done at Tower #274.This should minimize future transverse movement as long as the opposite foundation (the left one)has good lateral support.In doing so,we would like to see an attempt made to pull or push the right foundation back to near its original position.This should straighten out the tower and relieve tower stresses that have been caused by the movement of the foundation.If the left foundation is used to pull against,care should be taken to assure it remains stable.Once the foundation is in a satisfactory position,good,densely compacted,gravels or concrete should be Mr.Stan Sieczkowski Page 6 backfilled in all voids around the blocks. If this is done,Tower #297 should behave similar to what Tower #274 has done since its legs were tied together.The two towers should then have similar likelihoods for future movements. Transverse movement may be prevented,but longitudinal and vertical movement and differential settlement,which cause the rotations,can still be expected.If the foundations are not reinforced to support the vertical loading,they will continue to settle until an adequate resisting strata is reached,or the structure fails.Settlement will continue to be both total and differential,with the latter causing additional rotation. To prevent or minimize vertical movement of the foundations at Towers #274 and #297,the bearing strength below their blocks needs to be increased.Possibilities,listed in increasing complexity and cost,include 1)tamping dense,granular backfill underneath the blocks,2) pressure grouting underneath the blocks,3)underpinning the blocks with beams or a grillage,or 4)repairing and reinforcing with steel casing and grout the rock anchors such that they can transfer loads to deep bearing strata. It may be possible to move the foundation back to its original position just by pressure grouting below it.This could save the expense of having to bring in equipment to move and support the foundation while repairing it.Compacting backfill or underpinning below the blocks could be done without removing the blocks,but a more thorough job would be done if the leg base was temporary moved aside and the blocks removed.Removing the blocks would have to be done to accomplish the fourth action listed above.In addition to any of these repairs,a drainage trench should be constructed to drain water away from the foundation to minimize adverse seasonal freeze and thaw affects. Tying the legs together is relatively simple and inexpensive.It could be accomplished with a two or three man crew in a half day.All options to reinforce the foundation's vertical capacity require delivering backfill and/or heavy equipment to the site,which will drive the repair costs up dramatically.It is not clear if and how easily ground access is available to the sites.Materials and equipment may have to be air lifted to each site. We are not confident that any of the repairs mentioned so far will completely arrest the foundation movement problems.We've listed them to give middle of the road options to the total realm of solutions.At the other end of the realm,opposite from the do-nothing approach,is the all-out, permanent repair or replacement option.This option requires installing driven piles or new grouted anchors in sufficient quantity and size to transfer the tower's loading to good,deep soils or rock.It may be possible to maintain the tower's current location and install the piles or bolts around or in place of the existing foundation.The piles or bolts would be connected to the leg base by tying to the existing concrete blocks or by using new concrete or steel pile caps.Alternatively, new foundations could be installed next to the existing ones and the legs transferred.This would ALASKA ENERGY AUTHORITY August 24,1999 Mr.Stan Sieczkowski Page 7 require two new foundations at each tower.Either way,this option will require heavy driving or drilling equipment be transported to the sites,which will be expensive. We also recommend that all towers with these block foundations be inspected from the ground. Any gaps found between the rock bolt nuts and the bearing plates should be measured,documented and then tightened.Similar inspections should occur periodically to monitor future movement of the foundations. We look forward to discussing our finding with you,and planning the next step to repairing these foundations. DRYDEN &LaRUE,INC. ;(\Of ALGregDfHuffman,P./ GDH:br\clients\aea\fndletter.wpd Dryden ¢LaRue,Inc. CONSULTING ENGINEERS Location:6436 Homer Drive,Anchorage,Alaska 99518MailingAddress:P.O.Box 111008,Anchorage,Alaska 99511-1008Phone:(907)349-6653 +Fax (907)522-2534Email:drydeniarue@micronet.net July 28,2000 Mr.Stan Sieczkowski Alaska Energy Authority 480 West Tudor Rd. Anchorage,AK 99503 Reference:Anchorage to Fairbanks 345 kV Intertie Foundation Movements On June 23,2000 Del LaRue and Greg Huffman of our office revisited the Chunilna Ridge area of the Anchorage to Fairbanks 345 kV Intertie.Bob Dugan,a geologist with Golder Associates accompanied us.The purpose of our trip was to measure foundation movements at Towers #274 and #297 and compare them with measurements taken last summer,and to evaluate the surface soils and geology at these sites.Attached is a letter from Bob describing the site geology and suspected mode of failure for these two towers. Our measurements at Towers #274 and #297 found the foundations have moved little if any since our initial visit in August,1999. We have completed Tasks 1 and 2 of our scope dated September 23,1999.We suggest the next phase be a final design to repair and stabilize the foundations.Upon reviewing the original design and existing conditions we propose the repairs include the following: *tying the two leg bases of Tower #297 together with cable and a turnbuckle,similar to Tower #274 *excavate around and below the existing concrete blocks ¢install four micro-piles around the concrete blocks *install at least one temporary anchor (likely a micro-pile)in line with the direction the foundation needs to be pulled to re-position it *using the good foundation and the temporary anchors,pull/push the block foundation back to its original position *cast a reinforced concrete footer below the blocks,tying it to the blocks and new micro-piles ¢install board insulation to prevent seasonal freezing below the new footer *use excavated material to backfill and mound around the blocks *dig drainage ditches around the site to divert and drain water from the foundation Alaska Energy Authority July 28,2000 Mr.Stan Sieczkowski Page 2 We believe this repair work will require light-duty equipment that can easily be transported to the sites by helicopter.We have enclosed a conceptual drawing of the foundation repair. We have estimated our fee to provide final design,construction drawings and technical specifications of this conceptual repair to be $16,500.This fee includes $1,638 invoiced by Evergreen Helicopters for providing transportation on our June 23 field trip. We can provide review drawings and technical specifications within three weeks of receiving authorization from AEA to proceed. If you have any questions,do not hesitate to call. DRYDEN &LaRUE,INC. GregD.Huffman,P.-E. GDH:mdw/clients/aea/274.&297proposalll Encl. cc:Remy Williams w/encl Engineer'sComputationPadNo.5505>EMISN WF CONCRETE Blocks |Gay "Yeelese BE Arcl, Cacbenks Litrelys TOWER.BASE-W/Arie BOLTS EXCAVATED €BACK FIC HATE Naea --oweteeeeSNes Seer Gea ¢CA -:,|”-==e?L4 -4 :"By,|7 aly. |Soh e4reaRBoRKars>ans -|7h.K A REIMER CED SuLAT yf |EMS [9 Cone 8 7LWSLLATIONVy)iy We AKRETS FOSTERY|iy |NEY g ; A i || tT} ke ZAK Ft T |eV EW TU CRO -PILESeyisnng-s*||oy ROCK ANILHOAS a ||: +J, wr L eeuily| CONCEPTUAL KEPAiREFauseRs274&*297 Received:7/28/00 11:16AM;344 6011 ->Oryden &LaRue,Inc.;Page 2 *JUE=28-00 FRI 11:16 AM GOLDER ASSOCIATES FAX:907 344 601.PAGE 2 Golder Associates Inc. i ;3 as 1750 Abbott Road,Suite 200 0 R [i [s 1 aKidepnowsoonsaasooh|ag)GolderFox(907)344-6011 LAAssociates July 28,2000 003-5443 Dryden and LaRue 6436 Homer Drive Anchorage,AK 99518 Attention:Mr.Greg Huffman,PE. RE:TOWER INSPECTIONS ANCHORAGE -FAIRBANKS INTERTIE Dear Greg: In response to your request,I made an inspection of three X structures on the Anchorage-Fairbanks Intertie on June 23,2000.These structures included #297,#274,and #251,all located in upland terrain north of Talkeetna.The following is a description of the groundconditionsandsuspectedmodeoffailureateachsite. STRUCTURE #297 Site Conditions. The right leg of #297 is founded on a concrete footer consisting of 3 layers of 3-ft square blocks,each layer about 1 ft thick.The footer is embedded approximately one foot Four 30-ft rods were used to anchor the footer.The footer was installed on November 3,1983 and load tested,to 30K the following day.A borehole log at the site recorded silt and gravel to a depth of 25 ft where the hole was terminated.The footer leans noticeably to the northeast.The rods under the footer are bent and the plates securing the rods are loose. By contrast,the foundation of the left leg of the structure is situated on slightly higher ground and shows no sign of movement. The right leg is located at the edge of a broad depression on the side of a gentle ridge of mostly silty,glacially-derived soil deposits which include scattered cobbles and boulders. A moat of surface water surrounds most of the footer.The soils directly under the footer consisted of weak saturated clayey silt with some gravel and sand.The surrounding terrain suggests that a small lake may have existed immediately after retreat of the glacier, depositing the fine-grained materials under the footer.These soils could be hand-probed, OFFICES IN AUSTRALIA,CANADA,GERMANY,HUNGARY.ITALY.SWEDEN,UNITED KINGDOM.UNITFM STATES Received:7/28/00 11:16AM;f=y]344 6011 ->Oryden &LanNue,inc.;rage ol 28-00 FRI 11:16 AM GOLDER ASSOCIATES FAX:907 344 6011 PACE 3 July 28,2000 -2-fi fh 003-5443 by vigorous pushing,with a 3/8-in.diameter steel rod to a depth of 3 ft under the footer. Probing to a maximum depth 6.5 ft was achieved a few feet downslope from the footer. Suspected Mode of Failure The footer was installed in November on fine-grained soils with a high moisture content. Considering the lateness of the season,it seems likely that the near-surface soils were frozen and ice-rich,and thus very strong.Therefore,it passed the Joad test.The following spring, the footer settled when the soil under the footer thawed.Since that time,the footer has probably continued to heave each winter and settle back in the summer. STRUCTURE #274 Site Coriditions | The right leg of #274 is founded on a concrete footer consisting of 2 layers of 3-ft squareblocks,each layer about 1.5 ft thick.The footer is embedded approximately 0.5 ft.Four 20-ft rods were usedto anchor the footer.The footer was installed on November 29,1983 and load tested:to 30K the following day.A borehole log at the site recorded silt and gravel to a depth of 10:ft.and hard,dry silt from 10 to 25 ft where the hole was terminated.A seconddescriptionofdrillingconditionsonthequalitycontroldocumentdescribes10ftofclayand gravel overlying bedrock.The footer leans noticeably to the northeast.The rods under thefooterare.bent and the plates securing the rods are loose.By contrast,the foundation oftheleftlegofthestructureissituatedonslightlyhighergroundandshowsnosignof movement., The right-leg is:'located within the margins of broad depression on the side of a gentle ridgeofexposed'slatey bedrock.The depression is saturated,swampy,and poorly drained.Itappearsthatabout10ftofsiltysoilsoverliebedrockatthefooter.The top foot or two ofthesesoilsare.organic-rich from the fibrous sedges that cover depression.A moat ofsurfacewatersutroundsmostofthefooter.The soils could be probed to a maximum depth of 6.5 ft in the vicmity of the footer.Surface water was flowing by the footer at the time of the investigation from ongoing snow melt.Seasonal frost was still present in some of the sous. Suspected Mode of Failure The mode of failure of this foundation is very similar to that of Structure #297.The footerwasinstalledinlateNovemberonfine-grained,organic-rich soils with a high moisture content.Considering the lateness of the season,it seems likely that the near-surface soilswerefrozenand.ice-rich,and thus very strong.Therefore,it passed the load test.Thefollowing'spring,the footer settled when the soil under the footer thawed.Since that time,the footer has probably continued to heave each winter and settle back in the summer. Golder Associates Received:7/28/00 11:17AM;8:344 6011 ->Dryden &Lahue,ine.3 rayo yi-26-00 FRI 11:17 AM.GOLDER ASSOCIATES FAX:907 344 6011 PAGE 4 0 _ OR APYJuly28,2000 3-003-5443 STRUCTURE#251 The footer for the left leg of Structure #251 was installed on an angle and does not appeartohavemovedsince. Please call.me at 341-6106 if you have any questions. Sincerely, GOLDER ASSOCIATES INC.Rudf\y-Robert G.Dugan,C.P.G. Associateand Senior Engineerifig Geologist RGD/]jh | D/F:C:\00-3q\jobs\003-5443\Triprpt0728.doc Golder Associates oy Saree saeets Duyden ¢LaRue,Ine. CONSULTING ENGINEERS Location:6436 Homer Drive,Anchorage,Alaska 99518MailingAddress:P.O.Box 111008,Anchorage,Alaska 99511-1008Phone:(907)349-6653 *Fax (907)522-2534Email:office@drydenlarue.com March 21,2001 Mr.Stan Sieczkowski ALASKA ENERGY AUTHORITY 813 W.Northern Lights Blvd. Anchorage,Alaska 99503 Reference:Anchorage to Fairbanks 345 kV Inertia Foundation Repairs for Towers #274 and #297 Conceptual Construction Plan and Cost Estimate In accordance with your request,we have developed a conceptual construction plan for repairing the foundation at Towers #274 and #297 of the referenced project.The repairs generally consist of realigning the damaged foundation,excavating around and below the existing concrete blocks,drilling micro-piles around the foundation,tying the micro-piles to the concrete blocks with a reinforced concrete footer,insulating and backfilling the excavation,and draining surface water away from the foundation.It is assumed all transportation of equipment,materials,and labor will be by helicopter and that road access is not available to the tower sites. Following is a sequential plan for performing the work based on our conceptual design. Sketches A and B,attached,illustrate these concepts.This plan is only our concept of how .- the work can be performed.We do not plan on directing the contractor how to perform the work.We will specify the end product and technical details such as restraining the tower,but how the work will be done will be left for the contractor to plan and AEA (with our assistance)to approve. 1.Mobilize equipment and materials via helicopter. 2.Install a temporary anchor (either a plate anchor or a micro-pile)to the side of the tower,away from the damaged foundation. 3.Drill and bolt anchor straps to the concrete blocks. 4.Climb the tower to the waist and install a cable guy with winch connecting the waist to the temporary anchor. 5.Install a cable tie with winch between the bases of the two tower legs (cable already exists at Tower #274). Excavate around and beneath the existing concrete blocks. Using the guy and tie cables with winches and pushing/pulling with available equipment,realign the concrete blocks to as near their original position and elevation as possible. 8.Complete excavation around and below concrete blocks.mm «a ALASKA ENERGY AUTHORITY March 21,2001 Mr.Stan Sieczkowski Page 2 of 2 10. Drill four micro-piles at the corners of the concrete blocks.Micro-piles are grouted piles approximately 4 inches in diameter with a central steel tendon (typically a Dywidag bar).The pile will be about 30 feet deep with the upper few feet cased with steel pipe. Excavate and install 4 feet deep insulation board enclosure around the micro-pile pattern. 11.Place reinforced concrete over the pile tops and below the concrete blocks.The new concrete will tie the micro-piles to the blocks through the anchor straps. 12.Insulate the top of the new concrete footer and the sides of the concrete blocks. 13.Backfill with native materials. 14.Dig drainage ditches that drain surface water away from the foundations. 15.Remove cable guy and winches after concrete has hardened. 16.Demobilize equipment. Anticipated equipment:-light drill rig,e.g.Ingersoll-Rand LM100 -light backhoe,e.g.Bobcat -concrete/grout mixer Anticipated materials:-tower climbing ladders -cables,winches -reinforcing bar/Dywidag bar/plate anchor/anchor straps -pipe casing -concrete/grout mix (approximately 4 cy/tower) -insulation board -miscellaneous hand tools : Equipment and materials can be transported to and from the site using a medium duty helicopter such as a Bell 214B (6,500 lb.capacity)or a Sikorsky 58T (4,500 Ib.capacity). Crews and light materials can be transported using a Hughes 500 (1,000 Ib.capacity)or other light helicopter.A four-man crew is anticipated. We estimate 9 -11 crew days will be required at each tower.We've estimated the total construction cost for both towers to be approximately $210,000.Construction period will be 6 -8 weeks (allows time for grout/concrete to obtain strength)after mobilization. If you have any questions or if we can be of further assistance,give us a call. 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CONSULTING ENGINEERS 3305 Arctic Bivd.,Suite 201,Anchorage,Alaska 99503-4575Phone:(907)349-6653 *Fax (907)522-2534Email:office@drydenlarue.com September 5,2001 Mr.Stan Sieczkowski ALASKA ENERGY AUTHORITY 813 W.Northern Lights Blvd. Anchorage,Alaska 99503 Reference:Anchorage -Fairbanks 345kV Intertie Stabilizing Tower #297 Foundation Enclosed is a drawing detailing the cable bridle assembly we recommend be installed on Tower #297 of the referenced project to stabilize its east foundation.We have specified standard transmission line materials be used,but we will be glad to work with the maintenance crew to approve alternative materials that may be on hand. If you have any questions,or need further assistance,give us a call. DRYDEN &LaRUE,INC. d,jo Greg D.Huffman,P.E. GDH:mdm/stan9-5-01.doc WeePROJECT:AEAFDN2FILENAME(CADD):D:\PROJECTS\AEAFON2\CABLE-BRIDLE.DWGDATE:9 5-01BASE OF WEST LEG C)S= WRAP CABLE 1 1/2 TIMES AROUND LEG BASE JUST ABOVE BOTTOM PLATE|||TYPICAL (2)PLACES ON EACH LEG \ \ \INSTALL GUY GUARDS APPROX.10'0.C. \ \ \ \ \liMIliI|matiae6 |IN TURNBUCKLE #1 TURN yBUCKLE#2---__jp 4 © / / SOUTH ANCHOR CABLE BRIDLE ASSEMBLY,TOWER #297 re)BASE OF o>EAST LEG eeANIN(LE S)EXISTING GUY-ANCHOR ."PeCONNECTION\2°MAX.Lo X DRILL NEW 13/16”9 HOLE y IN 1”-FOR ANCHOR VeSHACKLEATTACHMENT4,#9 DWYDAG ANCHOR ROD Xx _¢(EXISTING)+\BRIDLE 2O\.ASSEMBLY oO OS:Ca ALOa78) peTAIL =1S MATERIAL LIST | MANUFACTURER ITEM |QTY |DESCRIPTION CATALOG No.7 [350 ft}STRANDED CABLE,1/2”BIA.,20,000 Ib.= (7#6 AW OR SIMILAR) 2 S)3-BOLT GUY CLAMP JOSLYN J931 3 S)THIMBLE-CLEVIS,40,000 Ib.BETHEA FSA-100--6 4 i ANCHOR SHACKLE,50,000 Ib.BETHEA ASH-66 5 2 TURNBUCKLE,EYE/EYE,50,000 Ib.BETHEA G-226--N ULTIMATE STRENGTH 1°x24” 6 22 GUY GUARD,8 ft.,YELLOW JOSLYN_J5718 NOTES: 1.THE FOUNDATION FOR THE EAST LEG OF TOWER #297 IS TILTING TO THE EAST AND NORTH.THE MAIN PURPOSE OF THE CABLE BRIDLE ASSEMBLY IS TO MINIMIZE FUTURE LATERAL MOVEMENT.IT MAY ALSO BE USED TO STRAIGHTEN THE FOUNDATION IF DOING SO DOES NOT JEOPARDIZE THE INTEGRITY OF THE WEST FOUNDATION OR SOUTH ANCHOR. 2.INSTALL THE BRIDLE ASSEMBLY (LESS GUY GUARDS)SNUG AS SHOWN WITH THE MAXIMUM TAKE-UP AVAILABLE IN BOTH TURNBUCKLES.WHILE WATCHING THE STRAIN ON THE WEST LEG,TURN TURNBUCKLE #1 TO PULL THE EAST FOUNDATION TOWARDS THE WEST.CEASE TURNING THE TURNBUCKLE IN THE EVENT THE WEST BASE BEGINS TO MOVE OR SHOW SIGNS OF EXCESS STRESS.TURN TURNBUCKLE #2 UNTIL THE CABLE RUNNING THROUGH THE SOUTH ANCHOR !S TIGHT. 3.INSTALL GUY GUARDS ON THE CABLES AT APPROXIMATELY 10 ft.ON CENTER. SCALE:NTS. Lips Deydlen {LaRue,FneCONSULTINGENGINEERS DESIGNED BY:GDH DRAWN BY:RAE TO STABILIZE TOWER #297 EAST FOUNDATION ALASKA ENERGY AUTHORITY ANCHORAGE-FAIRBANKS 345kV INTERTIE CABLE BRIDLE ASSEMBLY DRAWING NO. CABLE BRIDLE 1 of1 1O0C Maintenance Subcommittee Meeting Minutes Special Meeting 1/7/03 Present:Monte Ervin -GVEA Doug Hall -AML&P Art Copoulos -AIDEA Charlie Kimmell -CEA Bill Bernier -CEA Tom Kelly -MEA Don Stead -HEA Greg Huffman Dryden and Larue Paul Williams Dryden and Larue Called to Order:10:00 a.m. Read and approved minutes of meeting Oct.22,2002 Discussion on Bill Bernier's report and condition of Str.#297 &274 Greg Huffman of Dryden and Larue presented some of the fixes proposed for the two problem structures in the Curry Ridge area.The estimate presented in 2001 at the request of AIDEA was about $230,000 and included Micro-Pile installation using Helicopters.There is no available ground access to these structures.Greg wasn't completely sure that those costs would be valid today,however they would be a good approximation assuming this type of construction was planned. The committee discussed several ideas and commented on the time passed since the towers were originally discovered to have a problem.Various ideas were discussed from jacking the structures and installation of the micro-piles,to moving the structures to locations either up or down line slightly with new foundatons.This may prove difficult as they are presently located at a spot where the wire breaks over both directions and have considerable loading on them.Tom Kelly suggested it may prove feasible to install "V” towers similar to those inset in the Tyee line in southeastern.It would then be simple to transfer the conductors and static and remove the existing structures.He thought it may be possible there were some structures were left over from the Tyee construction a couple of years ago. The committee would like to pursue the installation of micro-piles and re-leveling the structures.To mitigate costs,since Dryden and Larue are the project inspectors for the Northern Intertie presently under construction,they can contact PAR Construction and find out if they would give a price to perform the work.PAR will have the required equipment in the state as part of their contract.It is believed this should create cost savings and a reasonable bid could be obtained.The {OC could then appropriate the funds for permanent repairs. Art questioned who should do the quality control,ssuming the project receives a go- ahead from the 1OC.Since Dryden and Larue are the de-facto designers and will establish the specifications,the committee thinks they should undertake that function and perform the required load testing etc. \IV Problems and solution discussion for rolled bundle (Bill Bernier's report) The committee discussed the recurring problem with the bundle conductor rolling over allowing the wires to rub together.Bill Bernier in his observations noted how the sag is very uneven between the conductors and this probably contributes to the rolling. The cause of this hasn't been determined however it's hard to believe the original contractor installed the conductors so unevenly.As this has been a problem for some time it is possible the conductor at some time would wear and subsequenily fray.As discussed before it would be possible to eliminate the bundle and operate the line as a single conductor as the loading is so small.This solution however will entail a considerable expense for new clipping shoes and equipment to re-reel the conductor. The line will have to remain out of service during such a project. SNLMS The committee had a short discussion on the SNLMS including the history and reason this solution was proposed vs.doing inset poles and other capital projects to eliminate liability for the poor design and differential loading as a result.The main problem with the SNLMS is not that it doesn't work but,since it is only installed every 10 structures it can't see all aspects of line during significant weather events.As a consequence patrols are still necessary to identify actual conditions.The data gathered so far hasn't been used to establish a permanent solution mainly because there haven't been significant snow caused problem until this year. Summary of report and discussions: The final analysis in discussions among the committee and Bill were that the line is still in relatively good condition and as it is 20+years old some maintenance items were bound to occur.The committee feels that since things will only continue to age,that at some point the IOC may need to establish a fund or saving account to finance Capital projects and major repairs if the line were going to continue to be a major link in the statewide electrical grid.A good point in this regard,is the present study for replacing the controllers on the SVCs.The committee believes when the spare parts study is completed it also will point to the need for a significant capital project. Date and Time next meeting April 15,@ 10:00 AM at AIDEA headquarters.. r , ce Th eek ;othe Ler i é LDA fame FOUNDATION MOVEMENTS ON THE ANCHORAGE TO FAIRBANKS 345 kV INTERTIE The downhill (east)foundations for Towers #274 and #297 in the Chunilna Ridge area of the Anchorage to Fairbanks Intertie have experienced significant settling,rotation,and lateral movement.On three occasions in the last few years,relative measurements of the towers tilt,anchor bolt projection,and lateral movement have been recorded.Measure- ments were taken using hand-held measuring tapes and inclinometers.The table below and on the next page summarizes this data. The foundations were installed in the fall of 1983 and final inspection was performed in late summer of 1984.A cable and turnbuckle assembly were tensioned between the two legs of Tower #274 in 1986.A similar assembly was installed between the two legs and the south anchor of Tower #297 in the fall of 2001.No measurements have been taken since the cable assembly was installed at Tower #297. INSPECTION DATE August 9,1999 June 23,2000 August 20,2001 Tower #274,West Foundation Slope of Base Plate East-west direction 0 0 0 North-South direction 3°,low north same same Projection of Anchor Bolts Above Concrete Northwest bolt 1%”1%”1%” Northeast bolt 1”1 5/8”1%” Southeast bolt 3/8”Vy,”Vy” Southwest bolt tight same same Tower #274,East Foundation Slope of Base Plate East-west direction 11°,low east North-South direction 2°,low north Projection of Anchor Bolts Above Concrete 11.5°,low east 2.5°,low north 11°,low east 2.5°,low north Northwest bolt 5%”5%”5 7/8” Northeast bolt 7 5/8”7 718”8” Southeast bolt TMA”7 3/8”7 5/8” Southwest bolt 5%”5 1/8”5%” Distance Between Leg Bases 50.85'50.82'50.85' INSPECTION DATE August 9,1999 June 23,2000 August 20,2001 Tower #297,West Foundation Slope of Base Plate East-west direction 1.5°,low east same same North-South direction 1°,low north 1.5°,low north 1.5°,low north Projection of Anchor Bolts Above Concrete Northwest bolt yy”same same Northeast bolt tight -same same Southeast bolt loose same same Southwest bolt yy”same same Tower #297,East Foundation Slope of Base Plate East-west direction 2°,low east 2°,low east 3°,low east North-South direction 11°,low north 12.5°,low north 13.5°,low north Projection of Anchor Bolts Above Concrete Northwest bolt 3 5/8”3%”3%” Northeast bolt 0 0 0 Southeast bolt 0 0 0 Southwest bolt 1”1 3/8”1 3/8” Distance Between Leg Bases 47.6'ATA 47.7 As can be seen from the above data,small amounts of movement occurred over a two- year period.Enough data is not available to determine if this movement is a trend or simply due to seasonal affects and the sloppiness of the soils and foundations. Regardless,the east foundations at both locations have significantly deteriorated and they may not be able to support a major loading event on the structure. The cable assemblies tying the legs together on both towers should be considered only a temporary solution.We believe the foundations likely will continue to move in small amounts,which may eventually lead to an irreversible structure failure.We have recommended that a permanent fix be implemented at these two towers.Until this permanent fix is completed,we recommend the foundations be routinely inspected and monitored to track their movements.We suggest a thorough inspection be performed at these two towers every time the line is routinely inspected.At least once a year, measurements similar to those ones documented above should be recorded and compared to previous values. \ /Deyden é GaR ue,Ine. CONSULTING ENGINEERS | 3305 Arctic Blvd..Suite 201.Anchorage,Alaska 99503-4575 Prone:(907)349-6653 ©Fax (907)522-2534 Email:office@drydentarue.com April 1,2003 Mr.Art Copoulos ALASKA ENERGY AUTHORITY 813 West Northern Lights Boulevard Anchorage,Alaska 99503 Reference:Anchorage -Fairbanks 345kV Intertie Monitoring Tower #274 and #297 Foundation Movements Enclosed is a sketch showing the foundation layout for Towers #274 and #297.This sketch details dimensions and slopes we typically measure when we visit the tower sites. The attached table lists the measured data we have recorded at three different times.The table has space for future data entries. We recommend continued monitoring of these towers and their foundations. Measurements like those previously recorded should be taken and compared to past values.It would be wise to laminate the sketch to make it a durable document for field use. If you have any questions,or need further assistance,give us a call. DRYDEN &LaRUE,INC. Greg D.Hiffman,P.E.//{/ GDH:mdnyart4-1-03.doc ANCHOR BOLT \ DESIGNATION,Tye.\Zz \© \O CENTER HUB NWy(NOT FOUND @ #274) \O _i(wi)al al (w2 Ls)(E1)a al (a2) wae]__re)Ge ,Lt [@pl_l.Bl -P :ak we a a a al.<¢TO WEST LEG,D1 ¢TO EAST LEG,D2--/'", LEG BASE SPACING,D3 AVv /INSIDE coce-/ OF VERT.PLATE TYP. - -_ TOWER BASE SLOPE ou (EAST-WEST OSDIRECTIONSHOWN)Sa SF= |a? a L.;eee {: Zz ') Ze go auy bere | = )to | WEST FDN nso con SCALE:NTS FHENAME(C460)O:\PROJECTS\AEAFON2\MONITORINGFON.DWGUATE.3-31-03PROJECT:AEAFDN2Lig,Dryden {LaRue,Ine ALASKA ENERGY AUTHORITY ORANG HO CONSULTING ENGINEERS ANCHORAGE TQ FAIRBANKS 345 kV INTERTIE FDN MONITORING NESIGNED BY:CDH TOWER No.274 AND 297 aORAWNBY:RAE MONITORING CF FOUNDATION MOVEMENTS TOWER NO.274 FOUNDATION MONIT RING Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 Measured By:GDH GDH GDH Distance,D1 --- Distance,D2 --- Distance,D3)50.85 ft.50.82 ft.50.85 ft. Difference in Base Elev.|0.50 ft.:1.30 ft. Guy Tension,Ahd (North)snug snug snug Guy Tension,Bk (South)snug snug snug WEST FOUNDATION Slope,E.-W.]0.0 deg.0.0 deg.0.0 deg. Slope,N.-S.(North low)|3.0 deg.3.0 deg.3.0 deg. Anchor Bolt Slippage,W1 1.3 in.1.5 in.1.5 in. Anchor Bolt Slippage,W2 1.5 in.1.6 in.1.8 in. Anchor Bolt Slippage,W3]0.4 in.0.5 in.0.5 in. Anchor Bolt Slippage,W4|0.0 in.0.0 in.0.0 in. EAST FOUNDATION Slope,E.-W.(East low)!2.0 deg.2.5 deg.2.5 deg. Slope,N.-S.(North low)|11.0 deg.11.5 deg.11.0 deg. Anchor Bolt Slippage,E1 5.7 in.5.8 in.5.9 in. Anchor Bolt Slippage,E2]7.6 in.7.9 in.8.0 in. Anchor Bolt Slippage,E3}7.3 in.7.4 in.7.6 in. Anchor Bolt Slippage,E4;5.3 in.5.1 in.5.3 in. TOWER NO.297 FOUNDATION MONITORING Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 Measured By:GDH GDH GDH Distance,D1]23.10 ft.22.80 ft.23.00 ft. Distance,D2]24.50 ft.24.60 ft.24.70 ft. Distance,D3]47.53 ft.47.40 ft.47.62 ft. Difference in Base Elev.|1.65 ft.1.60 ft.1.60 ft. Guy Tension,Ahd (North)loose loose loose Guy Tension,Bk (South)snug snug snug WEST FOUNDATION Slope,E.-W.(Eastlow)}1.5 deg.1.5 deg.1.5 deg. Slope,N.-S.(North low)}1.0 deg.1.5 deg.1.5 deg. Anchor Bolt Slippage,W1 0.2 in.0.2 in.0.2 in. Anchor Bolt Slippage,W2}(0.0 in.0.0 in.0.0 in. Anchor Bolt Slippage,W3 loose loose loose Anchor Bolt Slippage,W4|0.8 in.0.8 in.0.8 in. EAST FOUNDATION | Slope,E.-W.(East low)}2.0 deg.2.0 deg.3.0 deg. Slope,N.-S.(North low)|11.0 deg.12.5 deg.13.5 deg. Anchor Bolt Slippage,E1 3.6 in.3.8 in.3.6 in. Anchor Bolt Slippage,E2 0.0 in.0.0 in.0.0 in. Anchor Boit Slippage,E3)0.0 in.0.0 in.0.0 in. Anchor Bolt Slippage,E4 1.5 in.1.3 in.1.3 in. instruments used to take measurements:rag tape,tape measure or ruler,magnetic base level/angle finder, and hand level.Dryden LaRue,Inc. 'tL /Deyden é LaRue,Ine. CONSULTING ENGINEERS 3205 Arctic Bivd.,Suite 201,Anchorage,Alaska 99503-4575Phone:(907)349-6653 ©Fax (907)522-2534 Email:office@drydeniarue.com April 29,2003 Mr.Art Copoulos ALASKA ENERGY AUTHORITY 813 West Northern Lights Boulevard Anchorage,Alaska 99503 Reference:Anchorage -Fairbanks 345 kV Intertie Cost Estimate for Replacing Tower #274 or #297 At your last IOC Maintenance subcommittee meeting,we were asked to supply a cost estimate for replacing the tower and foundations at either Tower #274 or #297.We have estimated this cost to be approximately $650,000 per site.Over $270,000 of our estimate is for helicopter transportation.The attached spreadsheet details the breakdown of our estimate. As you can imagine,there are many variables and assumptions in our estimate.Some of the assumptions we have made include: e Total tower and foundation replacement e No broken conductors e A spare tower is available and compatible for use as a replacement e Non-winter construction e Helicopter access only e All materials and equipment can be transported to the site with helicopters rated for lift capacities of 4000 Ib.or less,at elevation 3000 ft. e All helicopters are available locally Our estimate should be considered at the low end of the possible range to replace a tower and foundation at either of these sites.Broken conductors,winter construction,and unavailability of helicopters due to fire season or other factors can significantly increase the costs. We In the event the foundations and tower fails,we estimate the down time for the intertie to be at least 10 to 12 weeks.This assumes the line will experience an outage at the time of failure.Again,this is a "best scenario”estimate that assumes all materials and equipment are available,and that a contractor can be contracted and mobilized in a short period of time. If you have any questions,or need further assistance,give us a call. DRYDEN &LaRUE,INC. Hy!Greg D./Huffman,P.E. GDH:mdm/art4-29-03.doc ALASKA ENERGY AUTHORITY ANCHORAGE -FAIRBANKS 345 KV INTERTIE CONSTRUCTION COST ESTIMATE TO REPLACE TOWER #274 OR #297 Average Manhour Rate:$150 Equipment Helicoptor Trips Crew Size Crew Hrs.&Materials Labor Total 1300#2300#4000# Prep./Mob.3 48 $21,600 $21,600 Fly in Fdn.Equip/Materials 5 40 $30,000 $30,000 8 8 6 Staging Area Support 3 30 $13,500 $13,500 Remove Old Tower 5 12 $9,000 $9,000 2 2 (2)New Foundations/Anchors 3 200 $30,000 $90,000 $120,000 40 8 Fly in New Tower/out equip.5 20 $15,000 $15,000 4 6 Staging Area Support 3 16 $7,200 $7,200 Assemble New Tower 5 30 $30,000 $22,500 $52,500 6 4 Install Gin Pole 5 20 $5,000 $15,000 $20,000 4 Test Micro-Piles 3 10 $4,500 $4,500 2 Erect New Tower 5 12 $1,000 $9,000 $10,000 2 Insulator/Conductor Work 5 40 $3,000 $30,000 $33,000 8 Cleanup/Demobilization 5 40 $30,000 $30,000 8 4 6 Staging Area Support 3 30 $13,500 $13,500 Subtotal:518 $69,000 $310,800 $379,800 84 26 18 Helicopter Costs Qnty.Cost Ea. 1300#,ASTAR ;84 $1,500 $126,000 2300#,Bell 205A1 26 $2,500 $65,000 4000#,Sikorsky S61R 18 $4,400 $79,200 Total:$650,000 per site Estimated Outage Duration: Engineering,Material Procure- ment,Solicit/Award Contract 4 weeks Construction 6 -8 weeks 10-12 weeks total Assumes tower and other major materials are on hand. 4/29/2003 Dryden LaRue,Inc. 4 "Greg Huffman To:Art Copoulos Ce:Williams,Paul;Del LaRue Subject:Intertie Towers #274 and #297 We have reviewed the measurements taken at the subject towers in July 2003 and October 2004. At Tower #274,there appears to be a trend of increasing anchor bolt slippage on the east foundation.We suspect winter heaving of the concrete blocks are jacking the anchor bolts out of the ground.The fact that the elevation of the east foundation is raising relative to the west foundation further supports this believe.A check of the foundation in late winter would confirm this.If true,there would be little or no gap between the anchor bolt nuts and the concrete when the ground is at its maximum heave. This is a serious problem and the foundation will eventually fail if corrective measures are not taken. At Tower #297,other than one suspicious measurement of anchor bolt Wl on the west foundation,there appears to be little movement over the last five years.Anchor bolt Wl on the west foundation was reported to have 4"of slippage in 2003 whereas its slippage in previous and proceeding years were reported to be less than 1/4".We suspect the 2003 recording is an error. Greg D.Huffman,P.E. Dryden &LaRue,Inc. 3305 Arctic Blvd.Ste.201 Anchorage,Alaska 99503-4575 Phone:(907)349-6653 Fax:(907)522-2534 1 10/14/2004 10:55 AM yt Jul.t4.2003 2PM 1DEA/-fe TOWENNO"2."FOUNDATION MONITC 3ING'??8 P8¥Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 /$Jvl OF er Measured By:GDH GDH GDH Mise tr od ot Distance,D1 --- Distance,D2 --- Distance,D3}50.85 ft.50.82 ft.50.85ft |7-Os |-\i5 0.85 Difference in Base Elev.|__0.50 ft.-1.30 ft.625 Ped”6-3 7SGuyTension,Ahd (North)snug snug snug on vs hemes |S oGuyTension,Bk (South)snug snug snug Paid +5 Sanwa WEST FOUNDATION Slope,E.-W.}0.0 deg.0.0 deg.0.0 deg.oO 3 Slope,N.-S.(North faw)|3.0 deg.3.0 deg.3.0deg.|SO he 3° Anchor Bolt Slippage,W1 1.3 in.1.5 in.1.5 ih.1.75-ad Anchor Bolt Slippage,W2 1.5 in.1.6 in.1.8 in.we ae dAdS Anchor Bolt Slippage,W3{0:4 in.0.5 in.0.5 in.Ss 378 Anchor Bolt Slippage,W4]0.0 In,0.0 In.0.0 in.o-O DO EAST FOUNDATION Slope,E.-W.(East low);2.0 deg.2.5 deg.2.5 deg.Ss on Slope,N.-S.(North low)}11.0 deg.|11.5 deg.11.0 deg./{-8 004 23° Anchor Bolt Slippage,E1 5.7 in.5.8 in.§.9 in.4:325-G.@25 Anchor Bolt Slippage,E2 7.6 in.7.9 in.8.0 in.2.75"9.12a5 Anchor Bolt Slippage,E3}7.3 in.7.4 in.7.6 in.5 Anchor Bolt Slippage,E4|5.3 in.5.1 in.5.3 in.6.125 f.4@23 TOWER NO,297 FOUNDATION MONITORING Date Measured:09-Aug-99 23-Jun-00 20-Aug-01 Measured By:GDH GDH GDH Distance,D1}23.10 ff.|22.80 ft.23.00 ft.A:2S 22.8575 Distance,D2|24.50 ft.24.60 ft.24.70 ft.|2/68 2yu.g Distance,D3]47.53 ft.47.40 fl.47.62 ft.|YP.FP 7 -Difference in Base Elev.|_1.65 ft.1.60 ft.1.60 ft.Lo -%b Fy Guy Tension,Ahd (North)loose loase loase face [ease Guy Tension,Bk (South)snug snug snug Sanus Pinas WEST FOUNDATION Slope,E.-W.(Eastlow)|1.5 deg.|1.5 deg.1.5 deg.Lo}O° Slope,N.-S.(North law)|1.0 deg.1.5 deg.1.5 deg."oO a Anchor Bolt Slippage,W1}_9.2 in.0.2 in.0.2 in.LOf on (25 Anchor Bolt Slippage,W2{___0.0 in,Q.0 in.0.0 in.0 48456 Anchor Bolt Slippage,W3 loose loase loose loos ©lsos& Anchor Bolt Sllppage,W4]0.8 In.0.8 in.0.8 in.73s. T EAST FOUNDATION Slope,E.-W.(East low)|2.0 deg.2.0 deg.3.0 deg,{-O i Slopa,N.-S.(North low)}11.0 deg.|12.5 deg.13.5 deg.1s 14 Anchor Bolt Slippage,E1 3.6 in.3.8 in.3.6 in.ree 4 ABS Anchor Bolt Slippage,E2 0.0 in.0.0 in.0.0 in.oo o Anchor Bolt Slippage,E3}0.0 in.0.0 in.0.0 in.o-0 fo) Anchor Balt Slippage,E4 1.5 in.1.3 in.1.3 in.(25 4-A2S instruments used to take measurements:rag tape,tape measure or ruler,magnetic base level/angle finder,and hand level.Dryden LaRug,ine. Intertie Maintenance Subcommittee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for Thursday August 3,2006 at 10:00 am at the AIDEA Headquarters,3%Floor Conference Roomin Anchorage. Tentative Agenda: 1.Update on SVC Outages and Repairs 2.Status on the Inset Towers for the Intertie 3.Status on the SLMS activities 4.Update on Condition of Str 274 and 297 Foundations 5.Maintenance and Patrol Updates for the Intertie 6.Status on the IOC funding for the SVC Upgrades and (2)Transmission structure foundations 7.Open Agenda 8.Date and time for the next meeting Please do not hesitiate to contact me if anyone wishes to add or modify this agenda. Thanks Charlie Kimmel Manager,Substation Operations,CEA 907-762-7661 _Message mS Lea Page 1 of1 James Strandberg From:Charlie Kimmel [Charlie_Kimmel@chugachelectric.com] Sent:Tuesday,August 01,2006 9:49 AM To:rjpiech@gvea.COM;halldw@ci.anchorage.ak.us;Karl Reiche;James Strandberg;Charlie Kimmel;Frank Bettine Ce:Del LaRue;dburlingame@epsinc.com Subject:Meeting Agenda Attachments:August Meeting Agenda.doc Attached is the meeting agenda for our August 3 meeting. For those of us who have maintenance contracts,it would be valuable to the committee to hear status reports about any events that may have occurred since we last met late in 2005. Hopefully Dave Burlingame and Del LaRue can update us on any developments of the contracts they are managing. Thanks Charlie Kimmel 8/1/2006 a)( i oe -SNCs >)ADHKarlReiche on:Shauna Howell t:Wednesday,December 29,2004 11:00 AM Karl Reiche;Brian Bjorkquist;Christopher Rutz Ce:Art Copoulos Subject:Internal IOC Pre-Meeting Importance:High jan 05internalpreiocmeetin....ooPleaseletmeknowviaemailif you would be available for this meeting (see attachment for more details)on Thursday,January 6,at 10:00 a.m.here at the AIDEA office. A.Adequacy of Snow Loading Procedures Snow Load Procedures have been developed and finalized.Generally the procedures are adequate except that ML&P,with GVEA support,refused to do daily weather checks. Responsibility for that task was transferred to an AEA subcontractor who has been asked to provide a price to do that work.In my view the solution is an inadequate compromise.This may be best handled by the 34 party review (see #F)which AEA recommended alongtimeago.If utilities resist a 3 party review the more drastic action may be needed.\ B.Other Snow Loading Contracts "Steven's Weather Station Upgrade «Ground Safety Patrol ¢Battery Changeouts 7 PV Panel installations ¢Snow Load Monitoring System General Engineering MEA continues to refuse to take over these contracts but has been added as an agendaitemfortheIOCmeeting.It is suggested that the independent review of the snow loading system determine whether this work is in the scope of MEA's maintenance contract and whether it makes sense for AEA to continue to manage these contracts.But if not AEA I'm not sure who else. C.Snow Loading Inset Tower Design Status Dryden and LaRue (D&L)has delayed completion of inset tower design.They have pushed the completion date back from November and to date have refused to provide a completion date.GVEA is pushing D&L to come up with a lower cost solution which may be contributing to the delay.In my view the D&L delay is unacceptable but transferring the project to another contractor would end up costing more,add to the '>scope,perhaps delay it further,and expend a lot of limited AEA time.Inset design can,FF ieloodl 7beasubjectoftheindependentreview. D.Draft EPS technical and procurement specs ©U/6/2 Ve EPS on contract to AEA prepared draft technical and procurement specs to initiate the'vs SVS project.There is an immediate need to do the work and utilities indicate that failure of the SVC's is imminent and_will result in shutting down the line.Wehave been proceeding assuming AEA would issue a contract to procure the new SVC's. The following questions need to be clarified prior to proceeding with procurement on the SVC project: 1.What is the funding source for the Project? 2.Should this project be put on hold until asset can be transferred to unified system Operator?Should the project be put on hold until other risk and liability questionscanberesolved(see below)?If the project is put on hold for these reasons,who is responsible for risk associated with failure of an existing SVC? - 3.Who is responsible for the costs associated with this project?Is the cost for the Project considered an operating and maintenance cost that is shared by Utility Participants in accordance with Alaska Statute 44.83.398(f)?See Intertie Agreement section 8.1.1?AEA will need written notification from IOC to confirm JOC utilities are responsible for the costs. 4.Who has financial responsibility for change orders and cost overruns?If AEA has liability on this project,is it realistic for AEA to manage a project of this magnitude in the current antagonistic environment between AEA and utilities? Utility cooperation and defined risk sharing would be a requirement to proceed. 5.Who has authority to manage the contract AEA or the IOC?To what extent is contract managed by AEA vs IOC?See #4. 6.Should this contract be managed under the same model (Project Management Agreement between AEA and ML&P)as work planned to complete the Intertie buildaround?Same question for the installation of inset towers foy snow load mitigation,and tower repairs? 7.Should Management of this project be transferred to Contracting utilities (CEA and GVEA)that have agreed to be responsible for maintaining the SVC's in their maintenance contracts? 8.If AEA manages or assumes any liability for the project AEA will need to hire an independ EA believes the current owners engineer EPS is conflicted through other IOC utility employment and the current antagonistic environment between AEA and utilities makes it difficult for EPS torepresentAEA.EPSshouldberetainedforon-site construction and installation over-sight. 9.Suggest AEA comments on the draft EPS technical and procurement specs be put on hold until above questions can be addressed. -Intertie Bypass pUWaitingonProjectManagementAgreement.”Brian taking "blame”for delays. F.Insurance Risk Assessment and 3 Party Review of Snow Load Procedures This will be recommended at the January IOC meeting. Intertie Maintenance Subcommittee \or The IOC Maintenance Subcommittee met on October 12,2004 at 10:00 at the AIDEA headquarters in Anchorage. Meeting Minutes Attendees: Art Copoulos -AIDEA Tom Kelly -MEA Bill Bernier -CEA Rich Piech -GVEA Doug Hall-ML&P Charlie Kimmel-GVEA Paul Williams-Dryden and Larue Bill Mygatt -EPS David Burlingame-EPS a 1)Follow up on capital funding for SVC upgrade. EPS is 75%complete on the specifications.They are working on the Scope. EPS will contact GVEA engineering to schedule a site visit to Healy and Goldhill Substations.EPS should be done with specifications and scope of work by the end of November.We will then review and then schedule a meeting to go for a final package to present to the IOC. 2)Emergency Repair Status on Teeland SVC's/SVS transformer. Per Charlie Kimmel the SVC's are working well.Charlie provided a paper from the SVC transformer manufacturer explaining why the transformers could be bad.We agreed not to install the padmounted transformer for SVC power,but to reorder another dry type replacement.CEA will then return the SVC transformer "loaner” back to GVEA. 2a)Charlie Kimmel put in a request to see about removing an outdated and inactive, Oil Circuit Transmission Switch (Breaker 4710).It will be necessary to de-energize the Intertie for approximately 2 days for the demobilization work.GVEA will get back with CEA &ML&P for a good window of opportunity. ms 3)Maintenance /Patrol updates. Aug 30.2004,GVEA flew in a contract engineer for consultation on tower 692. The results were given to subcommittee members.The findings indicate that the tower has moved and that core sampling to tests soil composition need to be done in order to identify the problem and put together a plan/work to correct /remediate the shifting settling of tower 692.GVEA plans to get the core sampling complete before the end of this year,with the anticipated work to remediate tower 692 Spring/Summer 2005. MEA performed a flying patrol of the southern section and found approximately 18 bird nests on tower structures.5 nests on 3-pole structures,the rest on one pole structures.MEA found no significant changes at tower 297,but found some water percolating at tower 274.MEA provided to the subcommittee measurements for pilings / foundations to towers 274,297 and will forward to Dryden and Larue for interpretation. Tom Kelly will assess the scope for ROW clearing and develop a plan for a reclearing schedule.. Let it be noted Bill Bernier,CEA,recommended to the subcommittee,that consistent with ROW Vegetation management "best practices"the re-clearing plan for the Alaska Intertie ROW should be done utilizing the following minimum standard: 1.Clearing should be to the full width of the Original Right of Way as cleared for construction of the line.Clearing should be as complete as possible and as close to ground level as reasonably possible without damaging the underlying vegetation and root mass. 2.Stream and River buffers should be clearly identified and trimmed/pruned consistent with the specifications required by whatever agency has jurisdiction or permit conditions require.3.Danger trees should be identified and removed as permitted 4.Helicopter landing pads should be re-cleared and reconstructed along the line.5.If,as MEA believes,(Art C.said he would verify from the records)there are also screening buffers required at road crossings the limitations imposed for those areas should be determined and incorporated in to the clearing plan. MEA also found one bundle twisted between towers 264-265 4)Dryden &Larue proposal for Winter 2004-2005 SLMS We had one snow patrol performed in September with no problems discovered. HDR is the contractor for the snow patrols and Dryden Larue will review and archive patrol data.About 1/3 of the PV panels have been installed;with 4 towers expected to receive new PV panels this winter. . There will be 14 sets of station batteries replaced this winter.4 of these batteries will be replaced right after the Contractor (Cruz)builds in snow trails to the sights. The other 10 will be worked into the replacement scheduled. 4a)Per Paul Williams preliminary design for the Intertie inset towers has started. 5)IOC funding for towers 274 and 297 Pending final decision from the IOC 6)Open Agenda Charlie Kimmel was nominated for,unanimously approved by the sub- committee,and accepted the Chairman position for 2005.Congratulations Charlie. 7)Next Meeting We will schedule a December 2004 meeting to go over EPS's scope and specs for the SVC Upgrade. Our next meeting will be at a future scheduled date in Dec 2004,at AIDEA Headquarters. Rich Piech /GVEA Operations Manager IOC Maintenance Subcommittee Chairman rjpiech@gvea.com ph.907-451-5686 fax 907-458-6374 \ly "Chintertic Maintenance SubcommiteeMeetingnoticeandagenda The IOC Maintenance Subcommittee meeting is scheduled for Tuesday October 12,2004 @ 10:00 a.m.,atAIDEA Headquartersin Anchorage. Tentative Agenda: 1.Follow-up on procurement of SVC's,Scope and Specifications 2.Follow-up on plan to install padmount a transformer for Teeland SVC's / SVS's. 3.Maintenance/Patrol updates. 4.Discuss Dryden &Larue proposal for Winter 2004-2005,SLMS related monitoring activities. 5.Follow-up on IOC funding repairs for towers 274 and 297. 6.Open Agenda. 7.Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rjpiech@gvea.com 907-451-5686 Intertie Maintenance Subcommittee ("fi Meeting Minutes The IOC Maintenance Subcommittee met on July13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Christopher Rutz -AIDEA Tom Kelly -MEA Bill Bernier -CEA Rich Piech -GVEA Doug Hall-ML&P Also in attendance were Paul Williams of Dryden &Larue Inc.and Dave Burlingame, and Bill Mygatt from EPS. 1)Follow up on capital funding for SVC upgrade. We discussed options for putting out to bid and selection of a contractor to perform our SVC upgrades.We decided to go with State funding and to use option 1. We agreed to have EPS continue working on putting the specifications and scope of work together for a contract bid. We also determined that this upgrade work would probably be done by contractors and not the utilities,except that the utilities would probably do the interface connections in-house. 2)Emergency Repair Status on Teeland SVC's/SVS transformer. The dry type transformer was installed at Teeland.CEA and EPS is continuing to plan and research installing the pad mount type transformer instead of dry types. 3)Follow-up on SAC's Reviewing SVC operating restrictions We decided to recommend to the IOC to have the Intertie operating restrictions reviewed and to have a performance model done to take in to account the changes to the Intertie system,i.e.BESS the Northern Intertie etc.,so that the operating restrictions could be modified. 4)Maintenance /Patrol updates. GVEA performed a flying,ground,climbing,patrol,on the Intertie from tower764to382theweekofJune14"2004.The crews inspected tower condition and noted maintenance areas;of particular note was water undermining at tower 692.We had our Construction Engineer evaluate the tower and we will have a consultant go to the tower to give us a recommended maintenance/repair fix. MEA had done a patrol of the southern section and found more bird nests on tower structures.MEA found no significant changes to towers 274,and 297,and found that there exists the need to reclear the ROW on MEA's part of the Intertie. Will ask for $100k to begin ROW clearing for this upcoming budget. 5)Follow-on discussion from Operations Managers meeting on Lindsey Towers. Per Bill Bernier,The consensus from the Operations Managers meeting was that the Utilities outside the Rail belt had no vested interest in supporting or not supporting the acquisition of Lindsey Emergency Restoration Towers for the intertie.The Rail belt Operations Managers felt that the decision was for the IOC to make and the Operations Managers group was not the right forum for discussion on the cost benefit of either buying or not buying these towers. Bill Bernier also commented that Chugach owns a Lindsey structure for emergency replacement of a failed tower on their Beluga and Teeland 138 and 230KV lines,and even though it has only been used once since it was purchased,it is comforting to know that we have it available.The only time these towers will be of true value to the Intertie participants is when the day comes and the need arises to place it in service. We agreed to recommend to the IOC Committee to initiate a cost benefit study to see if purchasing the Lindsey towers for Intertie tower failures will be cost effective. 6)Dryden &Larue proposal for Winter 2004-2005 SLMS The following was sent to the IOC for budget approval $50k for PV Panels,$60k for Weather Monitoring System,$30k for battery change outs,$50k for snow patrols, $140k for inset structure,and $10k for cell phone bill. 7)IOC funding for towers 274 and 297 Pending final decision from the IOC 8)Next Meeting Agreed to have our meeting two weeks prior to the IOC meeting,so that our recommendations,decisions,findings,can be ready for the IOC meeting. Our next meeting will be 7 October 2004,in Anchorage at AIDEA Headquarters Rich Piech /GVEA Operations Manager IOC Maintenance Subcommittee Chairman rjpiech@gvea.com ph.907-451-5686 fax 907-458-6374 Intertie Maintenance Subcommitee \3- Meeting notice and agenda "Eon S 34-095?; - The IOC Maintenance Subcommittee meeting is scheduled for Tuesday July 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 1.Discuss procurement complications of SVC's 2.Discuss emergency repair status on Teeland SVC's /SVS transformer 3.Follow-up on SAC's reviewing SVC operating restrictions. 4.Maintenance/Patrol updates 5.Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. 6.Discuss Dryden &Larue proposal for Winter 2004-2005,SLMS related monitoring activities. 7.Follow-up on IOC funding repairs for towers 274 and 297. 8.Open Agenda. 9.Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech. GVEA Operations Manager rypiech@gvea.com 907-451-5686 y Message Page 1 of 2 . ' Art Copoulos From:Software.Services [Software.Services@shawgrp.com] Sent:Wednesday,July 07,2004 6:17 AM To:Software.Services Subject:PSS/E website user name and password change Dear PSS/E User, Shaw Power Technologies,Inc.has changed your user name and password to access the PSS/E user support area on our website:www.pti-us.com User Name:psse04 Password:road64 Please feel free to contact us at psse.support@shawgrp.com or 518-395-5075 Option 1 for any questions or comments. e PSS/E e-Learning is available.For more information please visit 5075 option 1. Regards, Debbie Scavia Support Services Coordinator Shaw Power Technologies,Inc.™ 1482 Erie Boulevard PO Box 1058 Schenectady,NY 12301-1058,USA +1 518 395 5075 (voice)option 1 +1518 346 2777 (fax) psse.suppont@shawgrp.comwww.pti-us.com HRKKKKKKEKKEKKKEKE KT tornet Email Confidentiality Footer****#88 RARER KEK Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person),you may not copy or deliver this message to anyone.In such case,you should destroy this message and notify the sender by reply email.Please advise immediately if you or your employer do not consent to Internet email for messages of this kind.Opinions,conclusions and other information in this message that do not relate to the official business of The Shaw Group Inc.or its subsidiaries shall be understood as neither given nor endorsed by it. The Shaw Group Inc. 7/12/2004 Message Page 2 of 2 1? http://www.shawerp.com 7/12/2004 Intertie Maintenance Subcommitee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for Tuesday July 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 8. 9. Discuss procurement complications of SVC's Discuss emergency repair status on Teeland SVC's /SVS transformer Follow-up on SAC's reviewing SVC operating restrictions. Maintenance/Patrol updates Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. Discuss Dryden &Larue proposal for Winter 2004-2005,SLMS related monitoring activities. Follow-up on IOC funding repairs for towers 274 and 297. Open Agenda. Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rjpiech@gvea.com 907-451-5686 p-* Intertie Maintenance Subcommittee |4 »a Meeting Minutes The IOC Maintenance Subcommittee met on July13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos --AIDEA Christopher Rutz -AIDEA Tom Kelly -MEA Bill Bernier --CEA Rich Piech -GVEA Doug Hall-ML&P Also in attendance were Paul Williams of Dryden &Larue Inc.and Dave Burlingame, and Bill Mygatt from EPS. 1)Follow up on capital funding for SVC upgrade. We discussed options for putting out to bid and perform our SVC upgrades.We decided to go with State funding a: a contractor to to use option 1. We agreed to have EPS continue working on putting the specifications and scope of work together for a contract bid. We also determined that this upgrade work would probably be done by contractors and not the utilities,except that the utilities would probably do the interface connections in-house. 2)Emergency Repair Status on Teeland SVC's/SVS transformer. The dry type transformer was installed at Teeland.CEA and EPS is continuing to plan and research installing the pad mount type transformer instead of dry types. 3)Follow-up on SAC's Reviewing SVC operating restrictions We decided to recommend to the IOC to have the Intertie operating restrictions reviewed and to have a performance model done to take in to account the changes to the Intertie system,i.e.BESS the Northern Intertie etc.,so that the operating restrictions could be modified. 4)Maintenance /Patrol updates. GVEA performed a flying,ground,climbing,patrol,on the Intertie from tower764to382theweekofJune14"2004.The crews inspected tower condition and noted maintenance areas;of particular note was water undermining at tower 692.We had our Construction Engineer evaluate the tower and we will have a consultant go to the tower to give us a recommended maintenance/repair fix. MEA had done a patrol of the southern section and found more bird nests on tower structures.MEA found no significant changes to towers 274,and 297,and found that there exists the need to reclear the ROW on MEA's part of the Intertie. Will ask for $100k to begin ROW clearing for this upcoming budget. 5)Follow-on discussion from Operations Managers meeting on Lindsey Towers. The consensus from the Operations Managers meeting was that it would be up to the Intertie related/affected utilities to purchase Lindsey towers for the Intertie as the Operation Managers'utilities had no vested interest,for the most part,in purchasing Lindsey towers We agreed to recommend to the IOC Committee to initiate a cost benefit study to see if purchasing the Lindsey towers for Intertie tower failures was cost effective. 6)Dryden &Larue proposal for Winter 2004-2005 SLMS The following was sent to the IOC for budget approval $50k for PV Panels,$60k for Weather Monitoring System,$30k for battery change outs,$50k for snow patrols, $140k for inset structure,and $10k for cell phone bill. 7)IOC funding for towers 274 and 297 Pending final decision from the IOC 8)Next Meeting Agreed to have our meeting two weeks prior to the IOC meeting,so that our recommendations,decisions,findings can be ready for the IOC meeting. Our next meeting will be 7 October 2004,in Anchorage at AIDEA Headquarters Rich Piech /GVEA Operations Manager IOC Maintenance Subcommittee Chairman rjpiech@gvea.com ph.907-451-5686 fax 907-458-6374 | Art Copoulos From:Art Copoulos Sent:Wednesday,June 30,2004 10:45 AMTo:hfdale@gvea.com vyCe:'Chris Rutz';Valorie Walker,Brenda Applegate 4Subject:RE:lOC budget Henri, In response to your email below,if the AEA is contracting for communications services,we need follow the state procurement codes and state policy relating to communications and network services (i.e.the current contracts with state telecommunications providers).In other words its not going to be as easy as just hiring a new contractor based on the work done by the SCADA subcommittee if contracting under AEA. Chris Rutz,AIDEA/AEA procurement manager will be at the July 13th IOC Maintenance meeting to discuss contracting for the SVC's under ABA.He could at that time also discuss this issue and if you'd like he can come to the IOC meeting as well. Art -----Original Message----- From:Henri F.Dale [mailto:hfdale@gvea.COM] Sent:Friday,May 28,2004 3:55 PM To:Art Copoulos Subject:IOC budget Art,I received the minutes from the SCADA subcommittee,in which they looked at communications charges.For budgeting puposes we may want to use the State's fees,but expect to go to something cheaper when the IOC has a chance to review and when physical arangements can be coordinated. Henri Henri F.Dale,P.E. Power Systems Manager Golden Valley Electric Assn. (907)451-5624 (907)451-5657 fax | ArtCopoulos From:Art Copoulos Sent:Tuesday,June 29,2004 2:34 PM To:"Chris Rutz' Ce:Brian Bjorkquist;Valorie Walker Subject:FW:IOC budget Z Meeting Minutes Final Telecom April 26,IOC ....teview-IOC SCADA..Chris, Brian has asked if we change communications contractors on the Intertie don't we have to go through a public procurement process? Also,if you need technical info call: Paul Johnson Mgr,Telecom/EMS Chugach Electric Assoc.Inc. (907)762-4447 (907)762-4694 FAX Art -----Original Message----- From:Henri F.Dale [mailto:hfdale@gvea.COM] Sent:Friday,May 28,2004 3:55 PM To:Art Copoulos Subject:IOC budget Art,I received the minutes from the SCADA subcommittee,in which they looked at communications charges.For budgeting puposes we may want to use the State's fees,but expect to go to something cheaper when the IOC has a chance to review and when physical arangements can be coordinated. Henri Henri F.Dale,P.E. Power Systems Manager Golden Valley Electric Assn. (907)451-5624 (907)451-5657 fax Are Copoulos From:Henri F.Dale [hfdale@gvea.COM] Sent:Friday,May 28,2004 3:55 PM To:Art Copoulos Subject:1OC budget Meeting Minutes Final Telecom April 26,IOC...teview-IOC SCADA..Art,I received the minutes from the SCADA subcommittee,in which they looked at communications charges.For budgeting puposes we may want to use the State's fees,but expect to go to something cheaper when the IOC has a chance to review and when physical arangements can be coordinated. Henri Henri F.Dale,P.E. Power Systems Manager Golden Valley Electric Assn. (907)451-5624 (907)451-5657 fax Message >Page 1 of 2 ° A -\3 -_(doferrwt ©Uk.reg -- Art Copoulos From:Charlie Kimmel [Charlie_Kimme!@chugachelectric.com] Sent:Thursday,June 03,2004 11:12 AM To:Art Copoulos;rcdrake@matanuska.com;rjpiech@gvea.COM;dstead@homerelectric.com; halldw@ci.anchorage.ak.us Subject:RE: |thought |would update everyone on the status of the Teeland SVS transformer.We installed and energized the new transformer that GVEA had sent us a couple of weeks ago.So far so good.We also checked on the availability of a 3-phase pad mount and found one in Beluga.It sounds like we have a possible shipping time of the last of June.|have been in contact with NEETRAC about doing an investigation of the failed transformer. We will send the failed transformer to them in a week or so.|will send everyone the results.They are charged with determining if the fault was internal or external with this transformer.They only pending item is the purchase of the replacement dry packs and what we should do at this point.GVEA shipped s one of there spares which needs to ordered promptly.The question for everyone is "Do we want to also buy a second spare at this time just in case the pad mount is defective and we want to go back to the original design"We could always send the second spare to GVEA for there use.Please advise.Lastly,|have been in contact with EPS and they agreed to Perform a review of the system and confirm the pad mount idea is sound.We should have this information in a few weeks. Thanks Charlie From:Art Copoulos [mailto:acopoulos@aidea.org] Sent:Thursday,May 13,2004 3:54 PM To:rcdrake@matanuska.com;fpiech@gvea.COM;Charlie Kimmel;dstead@homerelectric.com; halldw@ci.anchorage.ak.us Subject:FW: IOC Maintenance subcommittee, Charlie Kimmel!will be sending out an email tomorrow with a recommendation for some emergency repairs on the Teeland SVC.Apreliminary description of the problem and repairs is providedbelow,but Charlie will be providing more details in the subsequent email.The Maintenance subcommittees input on this recommendation is needed by Monday so it can be delivered to the special IOC meeting scheduled for Tuesday. Bob -please pass this on to Tom Kelley as he does not have an email. From:Charlie Kimmel [mailto:Charlie_Kimmel@chugachelectric.com] Sent:Wednesday,May 12,2004 1:27 PM To:Art Copoulos Cc:halldw@ci.anchorage.ak.us Subject:RE: Art, Welcome back.As an update to where we are,we installed a spare transformer that GVEA gave us.| have since ordered (2)new ones to replenish our spares one of which will be shipped to GVEA.We did run into a problem about matching impedances on the GVEA spare.This will probably be another problem if we run it very long in this condition.We tentatively expect to re-energize today.We will have to solve this possibly when the new ones arrive.|do think that we should consider another remedy for this problem as these transformers have failed us twice.We believe that an outdoor 3-phase oil transformer would be a solution as they are more rugged and further we may be able to perform maintenance more regularly and 6/3/2004 Message Page 2 of 2 diligently.|would suggest that we leave the current units in place but install a transfer switch to utilize them as alternate sources.Doug Hall sort of concurred with this thought.!would recommend that we hireaconsultanttomakeanappraisalandprovideacostestimateasafirststep.Do you have discretionaryfundstouseforsuchpurposes?Do you think we should have a teleconference with all members? Please let me know if there is anything else I can do. Thanks Charlie 6/3/2004 From:Art Copoulos [mailto:acopoulos@aidea.org] Sent:Wednesday,May 12,2004 1:00 PM To:rcdrake@matanuska.com Cc:Charlie Kimmel Subject:FW: Bob -see below. rcdrake@matanuska.com From:Charlie Kimmel (mailto:Charlie_Kimmel@chugachelectric.com] Sent:Monday,May 03,2004 11:32 AM To:Art CopoulosCe:rjpiech@gvea.COM;halldw@ci.anchorage.ak.us;Brian Hickey;Kevin Dunham;John Cooley Subject: Art, Friday afternoon,the Teeland SVS experienced problems and shutdown.We investigated the source and found one of the 1 phase station service transformers had faulted.This happened a few years ago and we replaced these transformers.We are still trying to determine the root cause of the fault and it may be a faulty transformer.In the interim,we will order a replacement transformer immediately.|expect a 8 to 12 week delivery time.|will keep you posted as additional information is known. |do not have an Email address for MEA.Would you please advise them when you get a chance? Thanks ,, Charlie 13DIntertieMaintenanceSubcommittee Meeting Minutes The IOC Maintenance Subcommittee met on April 13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Tom Kelly -MEA Charlie Kimmel --CEA Bill Bernier -CEA Rich Piech -GVEA Steve Willis MEA AMLP -Absent Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc.and Dave Burlingame from EPS. 1)Follow up on capital funding for SVC upgrade. Per Art Copoulos,the IOC Maintenance Committee decided to keep as a combined package the SVC upgrade,the SLMS remediation,and towers 274 and 297 together as one total project cost that can be used for budgetary purposes.The IOC did not want to vote on each project separately,but to get a "total”cost for all projects combined. Dave Burlingame requested that we consider asking the IOC maintenance committee to do a "qualifying”for the SVC upgrade because there were other interested companies in doing the SVC upgrade work.We agreed to ask this of the IOC . 2)Follow-up on SAC's reviewing SVC Operating restrictions. We have not received an answer to the supposed restrictions,and asked Art Copuoulos to bring this up again to the IOC maintenance committee for further information. 3)Discussion on Maintenance Plans and Updates. Rich Piech stated that GVEA had done a flying patrol of the Southern Intertie from Healy to Indian River on 17 Mar 2004,and had found the transmission line in good condition with no changes. Rich Piech gave Tom Kelly a copy of a tower maintenance/inspection checklist for MEA's use. Charlie Kimmel,Bill Bernier (CEA)discussed with Tom Kelly and Steve Willis (MEA)on the area of responsibility for: a.The 5.5 mile transmission line from Teeland Substation to Hollywood Substation. i.e.who will be responsible for pole repair,for distribution and or transmission line maintenance and repair.The general consensus was that CEA would take care of the transmission,and MEA would take care of the distribution.With the proviso that if there was an emergency situation MEA would like to do repairs to get their customers on as soon as possible. There was discussion on the area of responsibility for Douglas substation, between what MEA would be responsible on maintenance repair and for and what CEA's area of responsibility for maintenance and or repair would fall.Art Copoulos (AEA)is going to revisit the current ownership issues of Douglas Substation and then advise CEA as to what item/s to include in the maintenance contract.CEA said they would take the request back to upper management for a decision and would get back to MEA and AEA to see if all were agreeable. 4)Follow-up on this year's SLMS related monitoring activities. Paul Williams stated that there were no major SLMS events,and that the contractor made 8 ground safety patrols of the transmission line this winter.Also that | 4 new sets of the PV (solar)panels had been installed for a total of 10 PV panels installed out of 24 tower stations.4 more PV panels are scheduled for installation next winter.Paul Williams also noted that there were fluctuations on the load cell on tower 120. 5)Date and time for next meeting. Our next IOC maintenance subcommittee meeting will be Tuesday,20 July,2004, 10:00a.m.at AIDEA Headquarters. Intertie Maintenance Subcommittee Meeting Minutes The IOC Maintenance Subcommittee met on January 13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Doug Hall -AMLP by telephone Tuckerman Babcock -MEA Tom Kelly -MEA Charlie Kimmel -CEA Bill Bernier -CEA Rich Piech -GVEA Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc. This meeting was primarily intended to clarify cost and scope on some areas of concern for Maintenance/Repair on the Intertie.The areas we covered were: 1)SVC .We agreed to submit ABB's Budget Proposal for the SVC upgrades to the IOC.Ata cost of approximately $1.9 million and two weeks work per site.We also asked Art to get with ABB to see if they would amend the time for an order from mid-February 2004 to May 2004.(Note,ABB did not agree to extend the pricing past mid-Feb.). 2)Tower 274,297 Repair.We requested that the previous quote for the tower foundation work (274,297)be restated to the JOC...$700k and 8 weeks for both towers during the same project. 3)Snow Load Mitigation.We decided to present to the IOC three options for Snow Load Mitigation. a.Continue performing snow load monitoring and patrols every year,at present cost and evaluate and complete upgrades and improvements at a cost that would be significantly less than 1 million dollars. b.Remove one of the bundled conductors,shorten insulator strings,remove yokes, pretension guys and re-sag conductors.Per Dryden Larue's estimate this would raise the ground clearance of the existing conductors by 14 feet,but would reduce the current stability limit of the Intertie from 75MW.The cost estimate for this option is approximately $6.6 million and we would still need to monitor/patrol the line after snow conditions dictated. c.Install inset towers,re-sag conductors as needed.This estimate would raise ground clearance of conductors by 38 feet,there would be no change to the intertie's current conductor stability limit of 75MW,and we would not have to continue snow load monitoring/patrolling.The cost estimate per Dryden Larue is approximately $18.4 million. 4)Intertie Extension.Del Larue stated that a cost estimate was already given to the IOC as part of a draft report recently completed.And that the only cost this project did not contain were estimates for any possible environmental issues.i.e. protracted process,and EA or EIS. 5)Lindsey Towers.Bill Bernier stated that he would bring up the cost estimate on Lindsey towers to the Operational Managers at their next meeting in May 2004 to see if they wanted to request purchasing a tower or towers for transmission tower failures. 6)Next meeting was agreed to be on Tuesday,13 April,2004,at 10:00 am at the AIDEA HQ in Anchorage. Intertie Maintenance Subcommitee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for Tuesday April 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 1.Follow-up on capital funding for SVC upgrade. 2.Follow-up on SAC's reviewing SVC operating restrictions. 3.Discussion on Maintenance Plans 4.Maintenance updates 5.Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. 6.Follow-up for this year's SLMS related monitoring activities. 7.Follow-up on IOC funding repairs for towers 274 and 297. 8.Winter PV Panel Installations. 9.Open Agenda. 10.Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rjpiech@gvea.com 907-451-5686 Intertie Maintenance Subcommitee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for Tuesday April 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 1.Follow-up on capital funding for SVC upgrade. 2.-Follow-up on SAC's reviewing SVC operating restrictions. 3.Discussion on Maintenance Plans 4.Maintenance updates 5.Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. 6.Follow-up for this year's SLMS related monitoring activities. 7.Follow-up on IOC funding repairs for towers 274 and 297. 8.Winter PV Panel Installations. 9.Open Agenda. 10.Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rjpiech@gvea.com 907-451-5686 .o) Art Copoulos \o- From:Richard Piech [rjpiech@gvea.COM] Sent:Wednesday,March 31,2004 9:22 AM To:Art Copoulos;"Charlie Kimmel';"Robert C Drake';halldw@ci.anchorage.ak.us Ce:john_cooley@chugachelectric.com;Bill Bernier;Mike J.Wright;Henri F.Dale Subject:Agenda foe Next IOC Maintenance Sub Committee Meeting a)a Jan04minutesIOC Apr04Agendainterti Subcommittee.d...e Maintenanc... Good Morning, Here are the minutes from our last meeting,and the agenda for our next meeting,which is scheduled for Tuesday 13 Apr.1000hrs at AIDEA HQ. FYI,I'll be out of town 3-9 Apr,but do plan on attending our meeting on the 13th. Rich Piech GVEA Operations Manager Intertie Maintenance Subcommitee "oO Meeting notice and agenda \5 The IOC Maintenance Subcommittee meeting is scheduled for January 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 8. 9. Follow-up on capital funding for SVC upgrade. Follow-up on SAC's reviewing SVC operating restrictions. Maintenance updates Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. Follow-up for this year's SLMS related monitoring activities. Follow-up on IOC funding repairs for towers 274 and 297. Winter PV Panel Installations. Open Agenda. |Date for time and next meeting.Apr&13 Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rypiech@gvea.com 907-451-5686 370 Intertie Maintenance Subcommittee Meeting Minutes The IOC Maintenance Subcommittee met on January 13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Doug Hall -AMLP by telephone Tuckerman Babcock --MEA Tom Kelly -MEA Charlie Kimmel -CEA Bill Bernier -CEA Rich Piech -GVEA Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc. This meeting was primarily intended to clarify cost and scope on some areas of concern for Maintenance/Repair on the Intertie.The areas we covered were: 1)SVC .We agreed to submit ABB's Budget Proposal for the SVC upgrades to the IOC.Ata cost of approximately $1.9 million and two weeks work per site.We also asked Art to get with ABB to see if they would amend the time for an order from mid-February 2004 to May 2004.(Note,ABB did not agree to extend the pricing past mid-Feb.) 2)Tower 274,297 Repair.We requested that the previous quote for the tower foundation work (274,297)be restated to the IOC...$700k and 8 weeks for both towers during the same project. 3)Snow Load Mitigation.We decided to present to the IOC three options for Snow Load Mitigation. a.Continue performing snow load monitoring and patrols every year,at present cost and evaluate and complete upgrades and improvements at a cost that would be significantly less than 1 million dollars. b.Remove one of the bundled conductors,shorten insulator strings,remove yokes, pretension guys and re-sag conductors.Per Dryden Larue's estimate this would raise the ground clearance of the existing conductors by 14 feet,but would reduce the current stability limit of the Intertie from 75MW.The cost estimate for this option is approximately $6.6 million and we would still need to monitor/patrol the line after snow conditions dictated. c.Install inset towers,re-sag conductors as needed.This estimate would raise ground clearance of conductors by 38 feet,there would be no change to the intertie's current conductor stability limit of 75MW,and we would not have to continue snow load monitoring/patrolling.The cost estimate per Dryden Larue is approximately $18.4 million. 4)Intertie Extension.Del Larue stated that a cost estimate was already given to the IOC as part of a draft report recently completed.And that the only cost this project did not contain were estimates for any possible environmental issues.i.e. protracted process,and EA or EIS. 5)Lindsey Towers.Bill Bernier stated that he would bring up the cost estimate on Lindsey towers to the Operational Managers at their next meeting in May 2004 to see if they wanted to request purchasing a tower or towers for transmission tower failures. 6)Next meeting was agreed to be on Tuesday,13 April,2004,at 10:00 am at the AIDEA HQ in Anchorage. BF Intertie Maintenance Subcommitee Meeting notice and agenda The IOC Maintenance Subcommittee meeting is scheduled for January 13,2004 @ 10:00 a.m.,at AIDEA Headquarters in Anchorage. Tentative Agenda: 1.Follow-up on capital funding for SVC upgrade. 2.Follow-up on SAC's reviewing SVC operating restrictions. 3.Maintenance updates 4.Follow-on discussion and recommendation for Operation Managers to purchase spare Lindsey Tower/s. 5.Follow-up for this year's SLMS related monitoring activities. 6.Follow-up on JOC funding repairs for towers 274 and 297. 7.Winter PV Panel Installations. 8.Open Agenda. 9.Date for time and next meeting. Contact me if you would like to address any other items. Rich Piech GVEA Operations Manager rjpiech@gvea.com 907-451-5686 Al (3-2 Intertie Maintenance Subcommittee Meeting Minutes The IOC Maintenance Subcommittee met on January 13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Doug Hall -AMLP by telephone Tuckerman Babcock -MEA Tom Kelly -MEA Charlie Kimmel -CEA Bill Bernier -CEA Rich Piech -GVEA Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc. This meeting was primarily intended to clarify cost and scope on some areas of concern for Maintenance/Repair on the Intertie.The areas we covered were: 1)SVC .We agreed to submit ABB's Budget Proposal for the SVC upgrades to the IOC.Ata cost of approximately $1.9 million and two weeks work per site.We also asked Art to get with ABB to amend the time for an order from mid- February 2004 to May 2004. 2)Tower 274,297 Repair.We requested that the previous quote for the tower foundation work (274,297)be restated to the IOC...$700k and 8 weeks for both towers during the same project. 3)Snow Load Mitigation.We decided to present to the IOC three options for Snow Load Mitigation. a.Continue performing snow load monitoring and patrols every year,at present cost. b.Remove one of the bundled conductors,shorten insulator strings,remove yokes, pretension guys and re-sag conductors.Per Dryden Larue's estimate this would raise the ground clearance of the existing conductors by 14 feet,but would reduce the current stability limit of the Intertie from 75MW.The cost estimate for this option is approximately $6.6 million and we would still need to monitor/patrol the line after snow conditions dictated. 4) 5) 6) Install inset towers,re-sag conductors as needed.This estimate would raise ground clearance of conductors by 38 feet,there would be no change to the intertie's current conductor stability limit of 7SMW,and we would not have to continue snow load monitoring/patrolling.The cost estimate per Dryden Larue is approximately $18.4 million. Intertie Extension.Del Larue stated that a cost estimate was already given to the IOC (7?)And that the only cost this project did not contain were estimates for any possible environmental issues. Lindsey Towers.Bill Bernier stated that he would bring up the cost estimate on Lindsey towers to the Operational Managers at their next meeting in May 2004 to see if they wanted to request purchasing a tower or towers for transmission tower failures. Next meeting was agreed to be on Tuesday,13 April,2004,at 10:00 am at the AIDEA HQ in Anchorage. Minutes from 5 Jan.,2004,IOC Maintenance Sub committee Tele-Conference. Attendees: Art Copoulos AIDEA,Charlie Kimmell CEA,Doug Hall MLP,Rich Piech GVEA,Tom Kelly MEA. Chuck Huntley/Gene Henderson ABB,Gregg Huffman Dryden &Larue,Henri Dale GVEA. wean SVC upgrades We discussed Scope and Cost for the for Teeland Sub,Healy Sub,and Goldhill Sub.The subcommittee came to a consensus to go with the "option A”,of the ABB quotes. Gene Henderson will give Chuck Huntley an estimate,in time for our 13 January 2004 IOC maintenance sub-committee meeting,for the SVC upgrade "Option A”. Included in this estimate will be the following additional areas: 1.Anestimate for an ABB rep.to visit sites for reconnaissance prior to installation,( ABB will get a good idea how each SVC needs to be wired and fit into each different system) An estimate for installation labor hours(utilities responsibility), And an estimate as to what the cost would be to do these SVC's one right after the other,as opposed to within an 18 month time frame.wrFoundation repairs to towers 274 and 297. We discussed the Scope and Cost for the foundation repairs to towers 274 and 297. Per Greg Huffman,depending on helicopter availability the repairs would run $400k - $500k per tower,and if both done within the same job,about $700K total. The time it would take to get both tower foundations repaired is 8 weeks. Snow Load Mitigation We discussed the different options and came up with two for Dryden &Larue (Greg Huffman)to look at and give us an estimate on (for time and cost),in time for our 13 January 2004 meeting.. 1.To estimate cost for Removing one of the conductors from the bundle,remove insulators from the towers to reduce the insulation level to 230kv (from 345kv), and resagging this section of line. 2.To re-look and give an updated estimate on tower insets for this section of the line. Intertie Extension We discussed this and the point was made that this extension is/should be for 25 miles of line and not 19 miles.Also there was a question and we asked Greg Huffman (Dryden & PayLarue)to re-examine the prior estimate for this project,to somehow include an estimate for ROW costs,if possible.And for Greg to get us additional information for our next committee meeting on 13 Jan 2004. Another suggestion was to send an estimate to the IOC but with a caveat stating "this estimate is contingent on and does not include ROW permitting and environmental costs. Our next meeting will be at AIDEA Headquarters in Anchorage on Tuesday,13 January, 2004,10:00a.m. 4%60S Clectric Power SystemsOsme. Consulting Engineers Alaska Industrial Development &Export Authority 813 West Northern Lights Blvd. Anchorage,Alaska 99503 Subject:Budgetary Estimate for SVC Controls Upgrade Attention:Mr.Art Copoulos Mr.Copoulos: Electric Power Systems,Inc.("EPS”)is pleased to present you with our budgetary estimate for the cost of required material and services to install new SVC control systems at the Gold Hill,Healy,and Teeland substations.This cost is in addition to the costs associated with the operating utility at each site or the administration costs of the AEA.We have assumed a 6 day work week at 10 hours per day.It is estimated that it will take 4 weeks per site and require two technicians from the construction contractor.The estimate also includes the cost of a construction manager and inspector.A per diem charge of $125.00 per day for each work day is included for each technician.Travel expense is included for each work day at Teeland and Healy.The travel and per diem costs of the equipment vendor is included in the vendor costs. Construction Contractor Labor =$58,640.00 Per Diem =$125.00 X 2 X 24 days =$6,000.00 Travel =$75.00/day X 18 days =$1,350.00 Construction Manager =160 man-hrs X $115.00 =$18,400.00 'Inspector=320 man-hrs X $80.00/hr =$25,600.00 Miscellaneous Material =$10,000.00 Vendor Equipment &Labor =$828,000.00 <oth Pet gureContingency@20%=$189,598.00 Total per site =$1,137,588.00 Grand Total for 3 sites =$3,412,764.00 If you have any questions or comments,please feel free to contact me at your convenience at 646-5185 Sincerely, William Mygatt,P.E. Principal Engineer PHONE (907)522-1953 *3305 ARCTiC BLVD.,SUITE 201,ANCHORAGE,ALASKA 99503 «FAX (907)522-1182 *WWW.EPSINC.COM PHONE (907)789-2474 *2213 JORDAN AVE,JUNEAU,ALASKA 99803 *FAX (907)789-4939 30 Minutes from 5 Jan.,2004,IOC Maintenance Sub committee Tele-Conference. Attendees: Art Copoulos AIDEA,Charlie Kimmell CEA,Doug Hall MLP,Rich Piech GVEA,Tom Kelly MEA. Chuck Huntley/Gene Henderson ABB,Gregg Huffman Dryden &Larue,Henri Dale GVEA. SVC upgrades We discussed Scope and Cost for the for Teeland Sub,Healy Sub,and Goldhill Sub.The subcommittee came to a consensus to go with the "option A”,of the ABB quotes. Gene Henderson will give Chuck Huntley an estimate,in time for our 13 January 2004 IOC maintenance sub-committee meeting,for the SVC upgrade "Option A”. Included in this estimate will be the following additional areas: 1.An estimate for an ABB rep.to visit sites for reconnaissance prior to installation,( ABB will get a good idea how each SVC needs to be wired and fit into each different system) 2.An estimate for installation labor hours(utilities responsibility), 3.And an estimate as to what the cost would be to do these SVC's one right after the other,as opposed to within an 18 month time frame. Foundation repairs to towers 274 and 297. We discussed the Scope and Cost for the foundation repairs to towers 274 and 297. Per Greg Huffman,depending on helicopter availability the repairs would run $400k -$500k per tower,and if both done within the same job,about $700K total.-Ihe $53 She ieSThetimeitwouldtaketogetbothtowerfoundationsrepairedis8weeks.padly sauwys ©PoB/SNEMUS REP, myoSnowLoadMitigation We discussed the different options and came up with two for Dryden &Larue (Greg Huffman)to look at and give us an estimate on (for time and cost),in time for our 13 January 2004 meeting.. 1.To estimate cost for Removing one of the conductors from the bundle,remove insulators from the towers to reduce the insulation level to 230kv (from 345kv), and resagging this section of line. 2.To re-look and give an updated estimate on tower insets for this section of the line. Intertie Extension We discussed this and the point was made that this extension is/should be for 25 miles of line and not 19 miles.Also there was a question and we asked Greg Huffman (Dryden & Larue)to re-examine the prior estimate for this project,to somehow include an estimate for ROW costs,if possible.And for Greg to get us additional information for our next committee meeting on 13 Jan 2004. Another suggestion was to send an estimate to the IOC but with a caveat stating "this estimate is contingent on and does not include ROW permitting and environmental costs. Our next meeting will be at AIDEA Headquarters in Anchorage on Tuesday,13 January, 2004,10:00a.m. \5 4 "deaska INTERTIE MEETING [sOOctober22,2003 AIDEA/AEA Board Room AGENDA ._e Y iF we Bonta)Negotiating Roles -'Glace gor?ULMER oR REA)FReyotiete TE wey: ---.dont gues :¢{_}coh *\Rel oan we give MEAb)RCA Actions -Pride UFo -green Pues'w ak 1S ove Rele <Cea!(Proactive +reviral DEALtheypaymoreGVER:: -ee Ee c)Future of Intertie Upgrade Project su mmart te,Oo mon'MEPS no AMA _oeeprend craks?.Comp romerAWEARecRovtetyBoARD?HEA CSunaifis)hy gach -BUFR neen J ta Rgree ood.shdy /gturt to go -hare ara we2 GvEA _oy i Reena ve.v4 Mee Ad Rucroahe c ...7 Ferwcnd Taterte uyConcernswithIntertieOperatingAgreement"Saas overall cost oF-haar aeed (nore ohay)a)Funding for Capital Repairs (SVC's,Tower Repairs,etc.)'st Sor Look @ BUIPErawples)&by :SK 'st loan RQb)Maintenance Contractor on Southérn Portion Agr cement @ R,N wat Problen s {2)c)Snow Load Concerns Repuurs -_stebitts1)MEA's Letter of September 11,2003 sant om Givadt ,Budgetry2)IOC Recommendations re:SLMS , 3)IOC-Funded Independent Assessment a 3.Future of Intertie a)Utility Purchase?(wr (To owt energy TAS FeRCE Powe) (2 RLUDER [Rirw x Ky reemsiy i reel io ©ppavikizerg 7 Ertediz aqranetPregf.oo_Fee (4 mike strelch - a =BB oc ACA =PetectimReidofotkneyctbin|=Neavventbens 126.BoLDesarevedRoles[-Peoactive Lnetesp |@ GUEA__CEA a \MehAgree.uy Resilts !Agrees of vesolts be _ff Offer fo flelp bot also assess)elenherg ADEA plans far its board2 Ac@osdrm&MenripoffetaSasterminecostsva 1)bility (Tow plow ="2 | Compromise Pre.of 20 millen_ ee Bsd_OF cearars_/_lown_may_RQ_apravmend fated -Rae gec{Ist Problems _-___,Repth --Noted RE 7B SpiningRos evrcee TsceesyStokModding|- Unparity semnesebeh /-*roceDuural /Buds ehwe _ac fv tre) \h-0 Intertie Maintenance Subcommittee Meeting Minutes The IOC Maintenance Subcommittee met on January 13,2004 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Doug Hall -AMLP by telephone Tuckerman Babcock -MEA Tom Kelly -MEA Charlie Kimmel -CEA Bill Bernier -CEA Rich Piech -GVEA Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc. This meeting was primarily intended to clarify cost and scope on some areas of concern for Maintenance/Repair on the Intertie.The areas we covered were: 1)SVC .We agreed to submit ABB's Budget Proposal for the SVC upgrades to the IOC.Ata cost of approximately $1.9 million and two weeks work per site.We also asked Art to get with ABB to amend the time for an order from mid- February 2004 to May 2004. 2)Tower 274,297 Repair.We requested that the previous quote for the tower foundation work (274,297)be restated to the IOC...$700k and 8 weeks for both towers during the same project. 3)Snow Load Mitigation.We decided to present to the IOC three options for Snow Load Mitigation. a.Continue performing snow load monitoring and patrols every year,at present cost,; and evaluate and complete upgrades and improvements at a cost that would be significantly less than 1 million. b.Remove one of the bundled conductors,shorten insulator strings,remove yokes, pretension guys and re-sag conductors.Per Dryden Larue's estimate this would raise the ground clearance of the existing conductors by 14 feet,but would reduce the current stability limit of the Intertie from 75MW.The cost estimate for this option is approximately $6.6 million and we would still need to monitor/patrol the line after snow conditions dictated. c.Install inset towers,re-sag conductors as needed.This estimate would raise ground clearance of conductors by 38 feet,there would be no change to the intertie's current conductor stability limit of 75MW,and we would not have to continue snow load monitoring/patrolling.The cost estimate per Dryden Larue is approximately $18.4 million. 4)Intertie Extension.Del Larue stated that a cost estimate was already given to the IOC @)-as a part of the draft report recently completed.And that the only cost this project did not contain were estimates for any possible environmental issues -i.e.protracted public process,and EA or EIS.- 5)Lindsey Towers.Bill Bernier stated that he would bring up the cost estimate on Lindsey towers to the Operational Managers at their next meeting in May 2004 to see if they wanted to request purchasing a tower or towers for transmission tower failures. 6)Next meeting was agreed to be on |Tuesday,13 April,2004,at 10:00 am at the AIDEA HQ in Anchorage. Va [3-0 Intertie Maintenance Subcommittee Meeting Minutes The IOC Maintenance Subcommittee met on October 14,2003 at 10:00 at the AIDEA headquarters in Anchorage. Attendees: Art Copoulos -AIDEA Doug Hall -AMLP Bob Drake -MEA Tom Kelly -MEA Charlie Kimmel -CEA Bill Bernier --CEA Rich Piech -GVEA Also in attendance were Del Larue and Paul Williams of Dryden &Larue Inc. 1)We voted to recommend to the IOC to either to replace all 3 SVC /Controls all at once,or one a year within a 2-year time frame,providing acceptable terms can be worked out with the contractor We also decided not to request any work on the cooling systems at this time. 2)We decided to recommend requesting that the SAC run a test model to see if the Northern Intertie and BESS will allow the removal of the restriction of unloading the Intertie when the Healy SVS trips off. 3)Maintenance Updates: -MEA did some foundation draining on tower 274.There was no significant shifting of tower 297 during inspection.MEA still needs to remove 2 bird nests and brushing needs to be done at Willow and McCurdy areas.Everything else seemed in order. -GVEA performed Flying/Climbing /Ground Patrol on 22-26 Sept.on towers 667,683,and 714 through 766.They brushed out and repaired several helipad areas.All other towers were in good condition. 4)MEA's inspection reported no activity observed and Del Larue commented that the towers 274 and 297 will go bad eventually,but when?Per Doug Hall's comment that,this Subcommittee did recommend to the IOC that it repair these towers last year.So,we will recommend again to the IOC that repairs need to be made and recommend that the IOC fund repairs for the towers.We will wait to see what comes back from the IOC on this matter.There was discussion on MEA's concern of liability to the low guy wires on tower 274,MEA arecommended to mark the guy wires so that no one would hit them while riding a snow machine. Bill Bernier did inform us on the cost of a normal structured Lindsey tower was around $240,000.but it would not meet the Intertie Standard,i.e.more skookum and double bundled conductor,Bill said that he would conduct a little more research into the cost/practicality of a Lindsey tower built to suit both the Intertie's and other Utilities'needs. 5) 6) 7) 8) In order to get the weather station at Stevens working,Del Larue submitted a proposal to supply and install a voltage monitoring relay so as not to drain the Station battery. Del Larue requested that he not be responsible for the snow patrol contract this year and that he would request the same at the upcoming IOC Committee meeting. There was general agreement that the current snow load monitoring system (SLMS)is effective and allows the line to be operated consistent with prudent utility practice,although MEA felt that the SLMS should continue as a minimum, but more had to be done to further eliminate the risk.The IOC Maintenance subcommittee supported continuing the current practice of snow load monitoring as a way to mitigate the risks associated with snow loading of the Intertie. Rich Piech was "unanimously”voted in as Chairman for the IOC Maintenance Subcommittee 2004. 9)Next meeting was agreed to be on Tuesday,13 January,2004,at 10:00 am at the AIDEA HQ in Anchorage. »|)Adu.8 hee enti 7 party.|wo”Cam Abe S fuge parks over tWie ee Meat Maybe stage portly -O \4-2,: Fag al =Sp /I [OB yra hcom,Fo)4 mabe Ret.rtm _Yo__not?LOC nackig )__GAC -strarbagh-adtusoty- =Atee Hal li,l,oe--@!a)._5VC_0p.Restnthinw =lB,Trae heres =oe wis ,(eos bePeron neseesr t hf -MstRc__--machine rec-nok as /:Cintteal ¢ 10ep Frame 6/7 ways of _ i Wew Trkertie bot,but na (oad _Bess Som - PA 1S__S haw nd.}mi paoky-__>_fFe mwnreve.2 esrie fen,[on Healy cue _/"tf Rass {ATL =nee og--_A way-_-(3\--+To 23-36Eve A"mau RAO AWKped -_neltiig"GaieegWA free /)Foti =A sot uf len:|-laokthesane4MEA notreegone_"nsec on374,did-lexcavetin,wale Wwe,(grewolicats)|menseed WE _(S 20"dewey -_O97=barely mag-no.wit thieihe AI |Del -jose-Bard,acs,3):aeButthaMEA-(et spall Uilinsr-Cony Lita)poteaom\dan knack hide spiti-A yoant bofire Bl kentvSa,moe neh boRemaue ©Ereega ops "aT ,Com dame to chin Wooyar i G06 eS.=bed than Eyrh_lael dog Talh,Ath i ef Tust_!Do het SPOTS HyTototrnY|4 Bil =will Lall,bert imey be a while-le kg Feth,ower +sate _on Grou L TOC ft mm _ER -waite mii May broal,£_[me shelLM SOnRALKE i-Linday Towels 8 4.-Couple Oildies im SELnbprested1Y)Congortiyn._|a bugerol.h AC ie Cosh How $Lu Lomnzent-__pzedly comm taney |barLincusy10Come vUp +dp __datign La rheye!|terra)Goo Ops.MORS =Piak Conk ealWG>SE puyd Pz +Some savings For I+_[ee Unig LY -Lrbon lie,LEO -(r1m_cth_LIte ify _.ctesrdarg ==Buh CoiewratieHower0_decansdide oth,sity Have Cok forma | Mméebi le suletetion .AACP-nor fH toeoey-a0 invest LiLtnohay=AM_netst.Bill-dot Ike”Band -ost Wezel to Fr---fupiit=Adve cede of TOC Evveng of Ohya RISK a -'samumwcliace,bathingSIAL ae Auch vrp mar fer,-Boh.-scay-Com Rec a _arys_to Fix [TOL Saf dot hovce Lf,oe uo |ec Rima agen¥rd Repairg on gad t OF7 = en - ow we eh jponi'y bev repel Mt vee,2Lindi=dike passiase 2:_Ly will SPC 4 t Lu 2 _|QareLuate inyeraaa f m nf {St t OPS Pownr€-7 Cond oroel_,Yowerd arth.sky Cromng,rape"Awe _jn_Alatda,¢9k Shey =cA Salles 00 nck purchase Levelasy_{|seve Fie all amy b GOre|Bt will pili _toels @_cose+Booe neditOPSity,||feoakdto ddsigy =SE MS -Sana Ptrré;cortiartr-CRUZDeeAdt/pee hevot_Libe de5%mut yon ih,=p as tere,.pt Bnet.ure cb ding wo)Certasic Sfand sag +a "nathy nS ce _tehemn___bo "Resolve Uo Oa &by..Reeve ,slo fa @-osgreyMgodSkhayarda000=hs-ntl _Hagare ==Stamped pisbetsinally=Clinecte-2nentloaoks 4 te Lan contiKhat=UY noler._conmtam Condi timd_<2- a aera Canal Bringseen niu_Attiiygng- -new=-Wind __ug.o_.hb -Aenignwha_recanrance_mtor-ad pb 1 Mek.AeMorth,Trboriro__.stll RISK On ella Vey.pedcate-Chgrlte.-2 lke an _avalanetgs,--Pend dongn_gongarituan.structive te peat Basrelecode__ Cera schey__Gn-Yor lagigrs B>____Dove-__prOntial there cobqeunt__happen_ob-onhy"reset inepeellle,__bit _D2t=na hayerclrus._cond:Heng Sched -aid -en St-Atl_-.SL-MS__vit_faked!ap Stork.hp_2y-eryph hag -606 thunke|¢%e Feds,_2 dhe Clot ag Pty,Charon alidiyt woRK-.De 5 Reed pian pally _-MEA__cothouse.-1s_-_-)fini 1 #@-pe Rar wrk SLMS Comauliol a" \r ¢ ALASKA INTERTIE MEETING October 22,2003 10:00AM AIDEA/AEA Board Room «a AGENDA 1.Extension of Right to Use MEA's Hollywood-Douglas Line a)Negotiating Roles b)RCA Actions c)Future of Intertie Upgrade Project 2.Concerns with Intertie Operating Agreement a)Funding for Capital Repairs (SVC's,Tower Repairs,etc.) b)Maintenance Contractor on Southern Portion c)Snow Load Concerns 1)MEA's Letter of September 11,2003 2)IOC Recommendations re:SLMS 3)IOC-Funded Independent Assessment 3.Future of Intertie a)Utility Purchase? . ,ee 1OC Maintenance Subcommittee Meeting Notes May 6,2003 Start:8:10 a.m. End:8:40 a.m. Art Copoulos,AIDEA David Burlingame,EPS Steve Koslosky,EPS Gene Anderson,ABB Larry Hembre,AML&P Doug Hall,AML&P Discussion ensued regarding options that EPS provided in terms of keeping the SVCs sustained and the option in regards to replacing the controls.There was no formal agenda for this meeting -discussion purposes only. The option that was looked at was what it would take to get the spare parts up and on board that are needed to keep the existing SVCs in their existing operation. The group discussed other similar situations around the country. ABB noted they did a survey as well as visited all of the GE owners of SVCs at that time.Found that the weak links was the control protections.The thyristor valves were still being supported at that time by another source.The valves are air-cooled and somewhat high loss,but still operational.The first retrofit done was for a GE SVC very similar to these,only in an industrial application.Replaced the control system and the interface between the controls and the valve - the trigger system -the fiber link.At that point,found that the interface was completely obsolete and there was no way to get parts or to upgrade,so it was replaced with an ABB interface directly to the valve. It was re-iterated that on that example project,they replaced the control and interface between the contro!and thyristor valves.Essentially,anything downstream from the thyristor valves on is what the customer would need to address as far as spare parts in the future. Many customers are looking to replace thyristor valves with water cooled valves to reduce the losses,and to extend the life. Costs have gone up about a 10%increase for last year. In ABB's budgetary proposal,it was asked if the controls in the control cabinet and the link between them which at this time is the fiber optic cables controlling the thyristors from the end of the optic link to the thyristor valves toward the controls from that point is what is essentially going to be replaced. The interface between the thyristor valve and the controls was not in the budgetary estimate. That was something they experienced in Utah,that the interface,if it failed,the value of the upgrade was 0,and at that time they developed an interface. As far as replacements on the thyristor modules,ABB has looked at developing actual drawers that could be built to slide right into the existing valve base.The interface is from the contro!to the valve,and that can be offered,and it interfaces to the connector on the thyristor modules. They supplied connectors on the fibers that would interface with the ABB equipment on one end and the GE equipment on the other. The group wants two additional proposals.One for replacing the control interface,and one for replacing the control interface and thyristors,so they can be compared by cost, and maintenance of the existing system.This would be in addition to the control retrofit proposal previously submitted.What the utilities want is what is the best overall technical and economical solution. The group discussed end of life for the equipment. They also discussed graphical design software called Mach 2 in which circuits are designed, and the software writes the program.A much higher advance than what was offered in 1996. The question about problems with the printed circuit boards -would replacing the interface or the interface and thyristors solve that?The answer was no,but the replacing of the controls will solve that -the Mach 2 will take care of most of that. The topic was discussed that what is the intention of the SVCs -if it's to survive the next 5 to 10 years,then we need to evaluate what is the best capital approach.An upgrade with a control replacement valve upgrade interface -basically extends life to 20 years.The main circuit equipment is almost consumables in the capacitors where you could replace those in-kind over the years and you can replace them individually as they failed.The life of the reactors is pretty long,but they are available today as a standard item.If you are going to make a capital investment into the SVCs,obviously the sooner you make it,the more benefit you get out of that investment. The revised proposal and other two options off of that proposal will be ready around May 30", 2003. 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Tentative Agenda: New agenda items for meeting on Wed.April 16,2003 Permitting required to remove inactive nests and MTA request to place distribution pole and anchor within intertie easement. 1OC members are reviewing this issue also. 1.oOnanbkWNRepair proposal for Towers 274 &297 (Dryden &Larue)--Cow 6 med)MopcareSVCSparepartsstudyWORTH/SOUTH |C SNLMS update on solar panel installation Work scheduled remainder of FY nus ud feOpenAgenda:Buda Ay SDateandtimefornextan Contact me if you would like to address any other items aaeson DaherteMad.Comm...Moke|_Q--»-New than,Tettype a <<.eee a _SB flock QOLTS ee !iBuilt.Wd)wakes.when Fx ZEWWetSUMS[-ste eer neRroblemsanBowls'a a:,Held while __Feo SEAL.Ww hen Sossved av o..settled)ro.takets.hittect eneeee an a net soe degettedi.-a._.eL_to get.ne aapHLSSAvyQaloooke..@_297.!3_tnips since.= iL _A_uttle mere.a . Last yeaa 381.trek (aeel)..rogelhsem 1i . , . ' ' oa : * ny . ' . 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Cxproy (nat Cah)ee _ |.apply.to.OS PWS tay Seve.to DOR.:|meet eeeaeFinely ._Nocts im --meSalon._caath th,dou-i read to|lle.re baie...Used)tC.NUT G0.u/0.1 A mile...NEST.a 1OC Maintenance Subcommittee Meeting Minutes Oct.22,2002 Present:Monte Ervin -GVEA Doug Hall -AML&P Art Copoulos -AIDEA Charlie Kimmell -CEA Paul Williams Dryden and Larue Called to Order:10:00 a.m. Read and approved minutes of meeting April 23,2002 I Update on SVC upgrade study: Regarding the spare parts study,Art reported that the IOC had recommended control system upgrade study for the SVCs and included options for all feasibilities including double circuits and upgrade of controls.Charlie felt this didn't solve the component hardware problems with the present systems.The feasibility study should be out anytime but the Maint.Subcommittee feels we need to have Burlingame proceed with looking at the spare parts problem and report back ASAP.The relaying and transfer trip scheme are concerns of the subcommittee and also need to be looked at.The $250,000 budgeted for the relay study seemed to be a bit much and Charlie said he would look at the the thought process for the money.Believe the $250,000 may have included the feasibility study as well as the relaying? Note:Feel free to correct me on this as my notes are vague. ll SNLMS (Solar panel installation and Battery maint. Paul Williams from Dryden and Larue reported that r new solar panel installations are approved.Batteries were changed on 7 stations and 7 more will be completed after the snow leaves in the spring.The Winter patrol contract for checking the line after alarms was let to Cruise construction again. Paul reported that the outline for a dispatcher class in the monitoring system is complete and he will be getting with ML&P dispatchers to show them the scope of the monitoring system.Doug suggested a form to insure monitoring procedures are completed as required.He will get with Paul and set up items on form to insure functions are complete. Charlie mentioned he had seen an EPRI study on load adjustments for sags and wondered if any of the committee people had a chance to look at it.He will senda brochure over to Del Larue to look at. Paul reported that he couldn't land at some sites because of heavy growth which brought into question the state of the ROW clearing cycles agreed upon over the last couple of years.Doug suggested that we look at the condition of the ROW and as Art said he hasn't had a chance to do an inspection himself,it would be helpful for him in evaluating the condition and work that needs to be completed if he flew it with the inspection crew. He said he would contact MEA and schedule an inspection.He will contact any others that would like to participate. Maintenance Issues: Monte reported that the ground patrol was partially completed however some areas couldn't be covered without a helicopter and as one wasn't available until late in Oct.it would completed at that time. The fence on the lower section of Cantwell substation has been collapsed from years of snow removal and requires rebuilding.A contractor has been contacted and no price has been submitted at this time. Open Agenda Doug addressed the as-built and upgrade on the transfer trip scheme.Presently has old relays and the concern is that the 20 y ear old scheme may not have the desired reliability. Date and Time next meeting April 16,@ 10:00 AM at AIDEA headquarters.. ISArtCopoulos From:Monte Ervin [MRErvin@gvea.COM] Sent:Monday,January 06,2003 11:36 AM To:Art Copoulos;Charlie Kimmel;Doug Hall;Tom Kelly Subject:.Maint.Subcomm.Minutes w |1OC Main.Sub. Minutes.doc Attached are the minutes of the IOC Maint.Subcommittee for the meeting on the 23rd of April.My notes were really hard to make out so bring any corrections to the meeting tomorrow. Thanks Monte 329 (Ollo[ae-ThierveepSheSLMS-2 locating con accath)of Hepp | Va >MEA cheesy,-Nerblef#Ran lei ly_a Tet Rearadts < [TE ,net hatte na Jey SLs |i wnat lassie ca SY Kanaunoch 4+oO Maly bo th -uA loai=10Cia,Agdaawnosss Sal 0K Te BIS Ny What Ney MEA -Dawro ovLermawsEAPa"vawaires -a 2 a oo .¢=r >Tushectyn Re =asic SR ITthensend)-to mamenanqgeCommittee\Vaekke.evalu tis @ theet "20 aa ( LO Le pare Put jo'S Cato veneer avai) CON Relea.|Thaailsn Ted nd Paloee"C3y ||-Doo fap |.2on| waa foo 7+Lmbid cre|!v Jepa a-suy 7 aud poiky ShoSepa-gaySe aZYulewecreapaseLLloVyWheis"rgaubedaiai?\[i NikeAAl what iS on shelf?[|\lap)ia (what TS nao)to”ho [|\Zi pun?_ne yuflaatinedaaie_whaty equertiliu oro noodle)&Taste \:|| ev a oantrt Serpe aby WA RAK 7 oe case--T Ne ga Ok FRom roc.i noble - WF)COAL BCE ew 15 i (Fetndt\|Ky pada AN yeeITICamaRNYSAEWLT |e _- -__|etetty om THAT|a :--_ AY "bask nes)+0 Caer dke,AoA nett (O._ysany_:Gadd,Cope n SHO are -speallf tine ®ayDns |_4=e OW cee =mM staat SS"Aer"thing S Cad @ -"Tallicen an EA 1 naadlgAvNapactin|on.nN nun,ut Rode /etaila, - :"a IF noodle _| |Pad / |a>The compen):]TGaS er:| al x Av)>GVEA oallly,aT<7 >/Reads\ia Ls \ AA Art Copoulos |S "Oo From:Art Copoulos Sent:Friday,December 06,2002 9:34 AM To:Art Copoulos;'halldw@ci.anchorage.ak.us';'Monte Ervin';'Tom Kelly (E-mail);'Don Stead (E- mail)';'charlie_kimmel@chugachelectric.com','Bill Bernier';'pwilliams@drydenlarue.com'; 'ghuffman@drydenlarue.com' Ce:Shauna Dean Subject:RE:Intertie Inspection IOC Maintenance subcommittee This confirms the meeting time for Tuesday Jan.7th 10 AM at AIDEA first floor conference room.|PROMISE | WONT CHANGE IT AGAIN.|anticipate that the following will attend in person: Doug Hall eoMonteErvin Tom Kelley T,Charlie Kimmel Bill Bernier tePaulWilliams(D&L) Greg Huffman (D&L){-/907 O35 prLIF The goal will be to discuss results of the recent inspection and develop any maintenance recommendations for the Jan.16th IOC meeting.You should all have a copy off Bill's write up.With respect to the foundation problems,|will bring thedatalogsonthetowersinquestionandGregHuffmanwillreviewhisrecordsthatincludesresultsfrompastinspections and evaluations. Another item to discuss at the meeting is the SVC study to be performed by EPS.Dave Burlingame indicated to me by email that he may not be able to complete the work by Jan 16th as we had originally agreed to and planned (60 days from time of issuing RFP).He is looking at juggling resources to do it and expects to get back with me on that today. Art ---Original Message------ From:Art Copoulos Sent:Friday,December 06,2002 8:01 AM To:'halldw@ci.anchorage.ak.us';'Monte Ervin';"Tom Kelly (E-mail)';"Don Stead (E-mail)';'charlie_kimmel@chugachelectric.com';'Bill Bernier';''pwilliams@drydenlarue.com';'ghuffman@drydenlarue.com' Ce:Shauna Dean Subject:RE:Intertie Inspection Looks like neither of those dates will work.Lets do this after the holidays when peoples schedules are back to normal. The IOC meeting is Jan.16th so that gives us time.How about: Tuesday Jan.7th 10 AM at AIDEA first floor conference room. or a Wed.Jan 8th 10AM at AIDEA first floor conference room Please let me know if either of these dates work and if not propose an alternate date.|will send out confirmation when I hear back. Art -----Original Message--- From:Art Copoulos Sent:Thursday,December 05,20uze <.59 PM To:'hallidw@ci.anchorage.ak.us';'Monte Ervin','Tom Kelly (E-mail)';'Don Stead (E-mail)';'charlie_kimmel@chugachelectric.com';'Bill Bernier';'pwilliams@drydenlarue.com','ghuffman@drydenlarue.com' Ce:Shauna Dean Subject:RE:Intertie Inspection Sorry about this but |just found out |have a conflict on the 18th and can't be here.Would it be possible to meet either of the following times instead?: December 10th 1-3PM? December 13th 10-12AM? If this is unworkable,|suggest going ahead without me and|will reserve the conference room and arrange forsomeonetobethereinmyplace. Art -----Original Message-- From:Art Copoulos Sent:Thursday,December 05,2002 2:00 PM To:'halldw@ci.anchorage.ak.us';'Monte Ervin';'Tom Kelly (E-mail)';'Don Stead (E-mail)';'charlie_kimmel@chugachelectric.com';'Bill Bernier';'pwilliams@drydenlarue.com','ghuffman@drydenlarue.com' Subject:RE:Intertie Inspection This confirms the meeting time for December 18th at 10AM at AIDEA in the First Floor Conference room.| anticipate that the following will attend in person: Doug Hall Monte Ervin Tom Kelley Charlie Kimmel! Bill Bernier Paul Williams (D&L). Greg Huffman (D&L) If Don or anyone wants to be teleconferenced in let me know.|won't sent up a call-in number unless there are more than 2 people wanting to telecon in. The goal will be to discuss results of the recent inspection and develop any maintenance recommendations for the Jan.16th IOC meeting.You should all have a copy off Bill's write up.With respect to the foundation problems,|will bring the data logs on the towers in question and Greg Huffman will review his records that includes results from past inspections and evaluations. Art -Original Message----- From:Art Copoulos Sent:Tuesday,December 03,2002 8:08 AM To:'halldw@ci.anchorage.ak.us';'Monte Ervin';'Tom Kelly (E-mail)';'Don Stead (E-mail)'; 'charlie_kimmel@chugachelectric.com';'Bill Bernier';''pwilliams@drydenlarue.com' Subject:Intertie Inspection Alaska Intertie Maintenance Subcommittee,Bill and Paul, Tom Kelley,Bill Bernier,Paul Williams,and myself completed an inspection of the southern portion of the Alaska Intertie last week.Bill Bernier completed a report describing the results of that inspection that includes digital photos.A copy is being sent to each of you that you should get in a few days.We found a few things,nothing major that should be discussed in advance of the January 16th IOC meeting.How about a meeting/teleconference at the AIDEA first floor conference room on one of the following 2 times: December 17th at 10AM or, December 18th at 10AM Let me know which if any of the times you can make and|will set up the meeting and get back with you.Propose another time if you can't make either. Art Mailing Address:Physical Address: *PO Box 71249 758 Illinois St. Fairbanks AK 99707-1249 Fairbanks AK 99701-2999 @Phone:(907)451-5686 Fax:(907)451-5618 'Association InE-mail address:mrervin@gvea.com Srcaiounesisience?xs shi Fax To:Tom Kelly MEA 907-761-9326 From:Monte Ervin Doug Hall AML&P 907-263-5441 Charles Kimmell CEA 907-762-4694 ArtCopoulos AIDEA 907-269-3044 Re:1OC maint.Subcommitee Meeting Pages:1 Date:3/12/02 Note:If there were any problems receiving this fax,please call:Monte Ervin @ (907)451-5686 ©Comments: The IOC Maintenance Subcommittee meeting is scheduled for April 23,2002 @ 10:00 hrs at the AIDEA Headquarters in Anchorage. Tentative Agenda:Contact me if you want any other items addressed at the meeting 1.SVCs and IOC planned upgrades 2.Update if any on SNLMS Solar panel installation and Battery Maint. 3.Maintenance summary reports (Work performed since last meet.) 4.Work scheduled remainder of FY 5.Open Agenda: 6.Date and time for next meeting . I'm sending this fax in case some of the Emails are wrong. Meeting Minutes 10C Maintenance Subcommittee EYmeERLEOBemLaESE Oct.2,2001 Present:Monte Ervin -GVEA Doug Hall -AML&P Stan Sieczkowski -AIDEA Steve Willis -MEA Charlie Kimmel CEA representative not present Called to Order:10:00 a.m. Read and approved minutes of meeting April 19,2001 SNLMS event patrol contract: Discussion on proposed contract centered on the concern of who is to determine amount of snow needed to call out a specific patrol.Stan recommended weather station be checked at Talkeetna for proposal and 2”or more of snow per event as verified by weather station be used.Steve Willis of MEA Dispatch will check on access to weather station information.The ML&P Power Dispatcher will be called @ 263-5458 to check on and off the line.There will be no guaranteed minimum and no automatic extension of contract.Dryden and Larue can make a report to the Subcommittee if an extension is necessary. The Committee recommends Dryden and Larue implement the contract as amended by the Subcommittee. SNLMS (Solar panel installation and Battery maint. The IOC has approved the installation of 4 more solar panels on the line.Discussion of battery change outs and condition of existing ones when changed.It was thought that in the last change out some of those installed weren't fully charged.Steve Willis requested if it were possible for a contractor be used to do the battery maintenance due to time constraints of MEA crews.Stan will check with ML&P and Chugach to see if there is any interest in performing the battery maintenance.If those utilities aren't able to perform the maintenance this Subcommittee recommends that Dryden and Larue prepare and oversee a contract for battery maintenance. Maintenance Summarys Monte reported on the work completed on the northern end over the last few months. Discussion on condition and problems with SVCs and operating perameters of the line when they are out of service.The Teeland sub SVC has been out of service most of the summer from a bad PT.Replacement was ordered but the wrong ratios were shipped.The shipment was turned around and was due in the week of Sept 11"when all air traffic was grounded.Since shipments have started again Chugach expects to have the replacements installed shortly. During this time the Healy SVC failed.GVEA crews worked on it and found a bad PT that had to be replaced.Operating system guidelines recommended the tie be opened when the Healy SVC was off line.GVEA didn't open the tie as crews were troubleshooting the problem and wasn't sure how the system would react when opened with both the Teeland and Healy SVCs off line.It is recommended that the Dispatch. Subcommittee and the lOC look at whether the SVCs need to be upgraded and the operating study updated.Since both the Northern Intertie and Healy Clean coal along with the Addition of Stevens Substation near Talkeetna will eventually be included in some of the operating characteristics a new study would seem to be necessary. Stan reported that Dryden and Larue had recommended a stabilization system for Structure #297 and that MEA was in the process of installing it.This along with Structure #284 had had the leg foundations jack and fold over.This will stabilize the structure until a permanent new foundation can be installed. Open Agenda Discussed operation and make up of the IOC,how often the Subcommittees are meeting,and whether they are reporting back recommendations. Date and Time next meeting April 23,200£-@ 10:00 AIDEA Stan requested to be on the next GVEA Aerial Patrol of the northern end of the tie. tom.ke lef MEA i ent Cie Konme|ChupTearJob ee eeteo June -.|grt.week -BLY.LINE...a aleSUCeoaoOo.Conrollers ot Che7"pBade 5gestly vo NP_fesétord.GAD_.-Chak2 alge nce len _due _o_voukneowy |Knamk Gest /avatlabeliiy..o.SUC.oe senna @ 8 ne ee ee ce cae oe tg eee thy..ae7>Look ab.Futere Resource.KLAO ee ve Laker=9 The,BM)WK-FORWARD.22,2 PSSO7)Veet fo LE}...DOC...Knew__uel.thane |whek nib ce >Look @ Payts -Fan.ou..Yo Supply Aoudge ce cee ct ee HbS GCE yt FCChugachull _looh._Gn Spee pets Drveleey,)--'earmeea14 Ld tlCOVER )Gs EB gehtfo Me by May 2270aaGUE+-a iaCEA Tiun__Devrtes -GVEA EPS oya Lede|oo pryarade teprgpotallBpede1,to-ay-I_Travahr (RID Failure,Bee 100@.Dou glada Break opened _ -SJ Grarol_Channel RussThrrlon_-Rep laced VICE _oe MNT ce eee nine eet eeeeeeneee'Adjsed Town...in.BROAD.laseeoeAQOtMUCHChange?ee veevoVTLShookTowed__Mody._Langer 2alta).neSee2a=.=-meet eerie ae _Poe em ne ren ee tee -_Mae..Repairs .._a wee ee es oe ee a=the."Rely=FAL =Ontebo).-