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Port Heiden Power System Upgrades Project Port Heiden, Alaska Final February 13, 2006
CONCEPTUAL DESIGN a1 4 REPORT |(4/2 RURAL POWER SYSTEM|4)UPGRADES PROJECT |PORT HEIDEN,ALASKA Prepared for: State of Alaska Alaska Energy Authority/ Rural Energy Group Prepared By: CRW Engineering Group 3940 Arctic Boulevard,Suite 300 Anchorage,Alaska 99503 (907)562-3252 February 13,2006 =AEANEXECUTIVE SUMMARY This Conceptual Design Report (CDR)was prepared by CRW Engineering Group,LLC. (CRW)for the Alaska Energy Authority/Rural Energy Group (AEA).The purpose of this study is to provide a conceptual design and construction cost estimate for upgrading electrical power generation and distribution systems for the community of Port Heiden,Alaska.The City operates the local utility and will be the only participant in this project. Existing Conditions Representatives from AEA,CRW and Electric Power Systems Inc.(EPS)conducted site visits on June 19,2003 and October 7,2004.During the initial site visit AEA Project Manager Lenny Landis met with local leaders to discuss the Rural Power System Upgrade (RPSU)program policies and goals.CRW engineer Karl Hulse and EPS engineer Jim Hall documented the existing electrical distribution system and power plant facilities,evaluated the potential power plant site and exchanged ideas with local operators regarding operation and maintenance of the existing and proposed facilities. During the follow up site visit AEA and CRW representatives held a second meeting with local leaders to confirm project objectives,installed wind monitoring equipment on an existing community-owned wind turbine and performed a limited geotechnical investigation at the proposed power plant and wind turbine sites using the City's back- hoe. Port Heiden's electrical distribution system consists of approximately 24,000 feet of three phase and 16,000 feet of single phase underground,direct bury primary voltage cable.The primary line operating voltage is 12,470/7200 grounded wye.The majority of distribution system components are approximately 20 years old,although some buried components might be significantly older.Outages are a common occurrence and are likely the result of damaged insulation and corrosion of the buried conductors.Over the years,long sections of buried primary voltage line have been "repaired”by laying new cable directly on the ground surface to bypass the failed section of buried line. All existing transformers,including thirteen 25 kVA single phase and five 150 kVA three phase units,are severely corroded and are at the end of their useful design lives. The Community's existing power plant,located approximately 500 feet west of the Meshik Subdivision (Figure 2),is a relatively new,metal-framed building that doubles as the City's fire station.The structure has a concrete slab-on-grade foundation,overhead garage doors and a separate room for the diesel generator cooling system;the plant's rated power generation capacity is 420 kilowatts (kW)from a combination of two generators (one 230 kW Cummins and one 190 kW John Deere unit).The 480 volt switchgear includes a breaker for each generator unit,and a breaker for the single Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL ES-1 February 2006 VAfeeder line to the three phase,wye-wye connected,150 kVA pad-mounted step-up transformer located in front of the building.Currently,no heat is recovered from the generators. The existing power plant facility is in fair overall condition.The Cummins gen set has high hours but continues to operate reliably.The John Deere genset,which was purchased by the City in 2005 via a loan from the Alaska Industrial Development and Export Authority (AIDEA),looks to be in excellent condition.However,a qualified diesel generator mechanic should inspect both generators prior to considering them for reuse. In particular,the generators should be checked for possible damage incurred due to the existing wye-wye step up transformer configuration;this configuration exposes the gen sets to potentially damaging shock loads whenever the distribution system experiencesafault(severed conductor,failed transformer,etc). Recommendations Power Plant Due to the age and questionable condition of the power generation and switchgear components,and the inherent dangers associated with co-location of the power plant and fire hall,it is recommended that a new dedicated power generation facility be constructed at the site selected by the community during the initial field inspection.The site is located near the existing City shop,approximately 200 feet south of the school. The site is owned by the City;the site's close proximity to the shop and school provides opportunity for beneficial use of recovered engine heat. The proposed diesel power plant consists of a 16-foot x 42-foot module which will be pre-fabricated in Anchorage and shipped with all motors,switchgear and other components already installed.The plant will house three diesel generators with a combined capacity of 460 kW (two 190 kW and one 80 kW genset)and include room for a fourth generator in the future.The planned switchgear will incorporate remote monitoring capabilities and allow for seamless integration with future wind turbines or other alternative energy technologies.A heat exchanger at the plant combined with buried,insulated hydronic lines will allow for recovered heat from the engine jacket water to be utilized at the school and/or city shop. Fuel for the plant will be stored in an existing 12,000-gallon,double walled intermediate tank currently located adjacent to the existing power plant building.The intermediate tank will be relocated to the proposed site and filled periodically via a City-owned fuel truck. Electrical Distribution System Based upon observations made during the site visits,upgrades to the community's electrical distribution system should include: Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL ES-2 February 2006 e Replacement of all exposed primary voltage cable (approximately 3,000 feet total)and select repair of buried portions of primary voltage distribution system. e Replacement of all exposed secondary voltage cable (approximately 1,000 feet total)and select repair of buried portions of secondary voltage distribution system. e Replacement of all existing pad-mount transformers in the community (13 single phase and 5 three phase)with new marine grade units. e Replacement of approximately 30 residential electric meters and boxes. e Disconnection of electrical service west of the bulk fuel tank farm to reduce line losses and help balance system loads. All exposed electrical cable will be replaced with new,code compliant buried cable. Existing buried cables will be located,tested for ground faults and repaired as necessary.All new conductors will be installed within NEC approved conduit. Schedule and Cost The proposed project schedule,subject to availability of funding,calls for design and permitting during the spring and summer of 2006 with construction beginning in the fall of 2006.It is anticipated that all construction will be complete by fall 2007. The total cost of the proposed diesel power system including design,supervision, construction,inspection,permitting,and insurance is estimated to be $1,649,000. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL ES-3 February 2006 TABLE OF CONTENTS Section/Title Page EXECUTIVE SUMMARY...........c:ccsssstssssesssecssssssecssesseeevenseeecenseseseneeesseennecseeenseesensens ES-1 1.0 INTRODUCTION..........ce cccssessseessseecsseessesecssreessssnseeesenesseeesesteessestesseesseeaeeeeaeeesees 11.1.PURPOSE1...eecscessecsssssessescsssecssscesenseueessecssseecesseeesesecesseseeaseeeensgees 1 1.2 COMMUNITY OVERVIEW ..........c:cccccscssessssseccssseecssesseeesstseseesenecerseeessees 1 2.0 SITE VISITS AND COMMUNITY INVOLVEMENT ...........cccccscssssssssesessessecessseesenss 2 2.1 SITE VISIT.ceccssscsseecsssecsceecseesssrecsssssceseesesescececseesesneesseueueseesenneceens 2 2.2 CONTACTS AND COMMUNITY INVOLVEMENT...........ccccssssssssveneeesees 2 3.0 APPLICABLE REGULATIONS AND CODEG...........cccccscsssccsssssscvsenscsssesecsesessenens 3 4.0 EXISTING POWER GENERATION AND DISTRIBUTION FACILITIES...............4 4.1.DESCRIPTION OF EXISTING FACILITIES..........c.cccscccssccstesessssssseeesenesees 4 4.1.1 Power Plant...cc cccscssssesecssenseseceeeeseeseesseeeeeveseueususensusasuenenenaenss 4 4.1.2 Distribution System .............cscceee sevsaaaeesseeseeeenecaeeseesanesssaeeneeenees 4 4.1.3 Equipment Suitable for REUSC...............s:ccsssccsseesssesssesseeenesesseeees 5 4.2 EXISTING POWER GENERATION CAPACITY AND DEMAND................5 4.3.EXISTING SYSTEM DEFICIENCIESuuu...eesssssescessssecsteessesvenscenenevenees 5 5.0 FACILITY DESIGN AND SITING RECOMMENDATIONS ...........ccccsssesceresseesseees 7 5.1.ELECTRICAL CAPACITY CONSIDERATIONG..........ccssccsscssrscsestesereeeeees 7 5.1.1 Historical Electrical Demand...............ccccsssesecesssseesesseceeseesesseeereeses 7 5.1.2 Planned Infrastructure and Capital Improvement Improvements..8 5.1.2.1 Water System Improvement ...........::cssssseeessseessereees 8 5.1.2.2 Community Seafood Processing Facility ..............00 8 5.1.3 Projected Community Growth............::::sssssccssssrsessssessessseesseeeeessaes 9 5.1.4 Projected Electrical Demands ..................scssccccesesssseseeeeeeceeeesseenes 9 5.2 DESIGN CONSIDERATIONS ...........:ccccssssssssnsssssscesssnseessseeecseseasseeetsses 10 5.2.1 CHIM ALC 00.cccececeeseseeenecenenseaaeececaeeeeneecenseeeesesssaceneeeeeeenseees 10 5.2.2 Natural Hazards ............ccccccssssssesssssssssssssssseeseceesssnsnseeeeeeceeesenenees 10 5.2.3 Geotechnical Conditions ............cccccccsssssssssssssssssseesesseeeeasseeeeees 10 5.2.4 Borrow Sources,Ownership,Material Costs............:cccceeesseeeeee 10 5.2.5 Site CONrO],..........ccssssssecesesssseesessesseeecsessseeeeeesessseeeeeeserenentesanegs 10 5.2.6 Alternative Energy SOurces.............::ccccesssrseesscessceresnseeesessenenees 11 5.2.6.1 Wind Turbine Power Generation ...........ccceessseseeee 11 WIN RESOUICE.......ce eccceeeeeecsseeecececeeeseseeeseaseseeseessesseeseneeeesentaens 11 5.2.6.2 Heat RECOVESY uc eeessssesssssseeeeenseseseseseeereesensseanens 12 5.2.6.3 GeOtherMal .........cccceccceccececceeeeeeeseseneerteeeeseneessseeeeees 12 5.2.6.4 HydrO-Clectric .........eceesseeeeecseeeseeeseeseeeneeeseetensreeeseeees 13 .5.2.6.5 Solar Photovoltaic POWEL.............sss:scceceeessseesesteneeees 13 5.8 PROPOSED UPGRADES ............c:ccccesssssssennececeesesseeeeseeeeeseeeenensenseenes 13 Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL i February 2006 5.3.1 SCOPE!Of WOFK..........ccsssssesccsssteccsssesseecseecesnecesseeceneearseceeeeseesneeeees 13 5.3.2 Power Plant Upgrades ........ccc sssssssecseescesseessseseceeceseneeenseseneerens 145.3.3 Distribution System Upgrades...........s ee eesseeeseeesscseeeeeeeecoeseesasens 14 5.3.3.1 Tie In to Existing Distribution System ...........essen 145.3.3.2 TrANSFOFMETS ....ce ceeseecesseesseesnetesseseaceesseeeeseeesecseseseees 14 5.3.3.3 Primary Voltage Distribution System Upgrades........15 5.3.3.4 Secondary Voltage Distribution System Upgrades..15 5.3.3.5 SErViICE CONNECTIONS.........ccecsesceessesssetersreeeeesaseenenens 15 6.0 PERMITTING oe ee ecececsccecsseeeeseesesaseeesessneesssesseeesssecsseeesssseeecsssseseesauausenenaees 16 6.1 GENERAL...ececsessccceeesssseneessecesseessessetsaeecsnessnessnesessnesesesenecseeeeenss 16 6.2 COASTAL ZONE MANAGEMENT.........ccccsccsccsscesssccssecsesseeecceeecesaeeesees 16 6.2 FIRE MARSHALL REVIEW......eee cescecseesseeessecesesseeessseseeceeeenerensnees 16 6.3 U.S.ARMY CORPS OF ENGINEERS WETLANDS FILL PERMIT.........16 6.4 NATIONAL ENVIRONMENTAL POLICY ACT (NEPA)..........:cccccccesseeeeees 16 6.5 ADEC REVIEW...ecceessssscnseceeeesesssnsesssevsneccssaeesessesssseneeeceeeansessnees 17 6.6 RCA CERTIFICATION.............ccscsccccsssecsstsesssesssesssecessnsesesssesseceeeenasecensees 17 6.7 FAA REVIEW...ee eeceesecssesseececeessecssneesneesseseesecesessecessseseeseeenauresssaess 17 7.0 CONSTRUCTION PLAN .......ceccssscsecessseesssssssecseesssesssecseeecsseessetesseseeenestessesens 18 7.1 ADMINISTRATION00...eee eeceseceeesseessseeecseessesecsseeeeessesessseneeeseneeaseeesnees 18 7.2 LOCAL LABOR SKILLS...eccsscssseseeessesssessssesssecscseesseeeceeeeeceseeeseees 18 7.3 LOCAL EQUIPMENT...ce ccceseessneesseeseceseessetesesesseesseeeesseeeeseeeeeeseeseanes 19 7.4 ACCESS/LOGISTICAL CHALLENGEG.............ccsccssssessseessseeeeeeseessesessees 19 7.5 CONSTRUCTION SCHEDULE1.0.0.0...cseccssccsssessessseeesseeceseeeesseeesees 20 7.6 CONCEPTUAL CONSTRUCTION COST ESTIMATE..........cccccccccssssessees 22 TABLES Table 1 -Contact INformation ..........sscscceesssssssncceesseessscesscesseeeesseseesseeceessaeaecaaaseeesnaasesas 2 Table 2 -Historical Demand Datta .0.........ce ceccccccccccecsensaceecensecceneeesssseneeesenseseeeeaeasesssseaseees 8 Table 3 -Projected Electrical Demands .................ssecsseseeesseeseeessneceesscssenseaeeceeueaeeeesenseane 9 Table 4 -Wind Turbine Power Production Estimates .............ccsceeseessssseeeeesenenenesensoes 14 Table 5 -Local Labor Pool oo...eesscccssssseeeeeeeeeceeeeessssececccesseeeeeeateneneescesuenssaeesooeeaas 19 Table 6 -Locally Available Heavy Equipment ............::ccscssssesesssssssssseeesersseseeeuesssssseeeees 19 Table 7 -Project Schedule -Port Heiden Power System Upgrades............::sessssesseeess 21 Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL ii February 2006 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Appendix A Appendix B Appendix C Appendix D Appendix E FIGURES Vicinity Map Community Site Plan Proposed Power Plant Site Plan Proposed Power Plant Floor Plan Existing Electrical Distribution System (4 Pages) PHOTOGRAPHS Existing Power Plant Building and 12,000 Gallon Intermediate Tank Power Plant Interior Existing 12,000 gallon Intermediate Tank to Be Relocated Proposed Power Plant Site Exposed Primary Cable Strung Along Ground Typical Existing Transformer Typical Secondary Voltage Pedestal Local Borrow Source APPENDICES Site Visit Report and Electrical System Inspection Report Community Electrical Demand Analysis Site Control Documents Wind Data Report and Economic Analysis Construction Cost Estimate Port Heiden Power System Upgrades Project Conceptual Design Report-FINAL iti CRW Engineering Group,LLC. February 2006 apc=if-7AAC ADEC ADNR AEA CDR City COE CRW DA DT EA FAA FONSI kVA kw kWh O&M PCE RCA SCHOOL ACRONYMS AND ABBREVIATIONS Alaska Administrative Code Alaska Department of Environmental Conservation Alaska Department of Natural Resources Alaska Energy Authority/Rural Energy Group Conceptual Design Report City of Port Heiden U.S.Army Corps of Engineers CRW Engineering Group,LLC U.S.Department of the Army Electrical Demand versus Time Environmental Assessment Federal Aviation Administration Finding of No Significant Impact Kilovolt-Ampere Kilowatt Kilowatt-Hour operation and maintenance Power Cost Equalization Regulatory Commission of Alaska Lake and Peninsula School District Port Heiden Power System Upgrades Project Conceptual Design Report-FINAL iv CRW Engineering Group,LLC. February 2006 1.0 INTRODUCTION 1.1 PURPOSE This Conceptual Design Report (CDR)was prepared by CRW Engineering Group,LLC. (CRW)for the Alaska Energy Authority /Rural Energy Group (AEA).The purpose of this study is to provide a conceptual design and construction cost estimate for upgrading electrical power generation and distribution systems for the City of Port Heiden (City),Alaska.The City operates the local utility and will be the only participant in this project. 1.2 COMMUNITY OVERVIEW Port Heiden is located at the outlet of Meshik River on the north side of the Alaska Peninsula,approximately 424 air miles southwest of Anchorage (Figure 1).Local community organizations include the City of Port Heiden,and the Native Council of Port Heiden.Regional organizations include the Bristol Bay Native Corporation,SECAP (a regional alternative energy organization)and the Lake and Peninsula School District. The current population of Port Heiden is approximately 90,(estimated by State Demographer).The majority of residents within the community are Alutiiq Alaska Natives. Based upon the U.S.2000 Census,there are 56 total housing units in the community, including 15 vacant structures.The majority of homes are heated with oil stoves. All community and residential buildings receive electricity via a partially buried distribution system fed by a diesel generator power plant,which is owned and operated by the City. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 1 February 2006 2.0 SITE VISITS AND COMMUNITY INVOLVEMENT 2.1 SITE VISIT Representatives from AEA,CRW and Electric Power Systems Inc.(EPS)conducted site visits on June 19,2003 and October 7,2004.During the initial site visit AEA Project Manager Lenny Landis met with local leaders to discuss the Rural Power System Upgrade (RPSU)program policies and goals.CRW engineer Karl Hulse and EPS engineer Jim Hall documented the existing electrical distribution system and power plant facilities,evaluated the potential power plant site and exchanged ideas with local operators regarding operation and maintenance of the existing and proposed facilities. During the follow up site visit AEA and CRW representatives held a second meeting with local leaders to confirm project objectives,installed wind monitoring equipment on an existing community-owned wind turbine and performed a limited geotechnical investigation at the proposed power plant and wind turbine sites using the City's back- hoe. Copies of site visit reports are provided in Appendix A.A map of the community is shown on Figure 2. 2.2 CONTACTS AND COMMUNITY INVOLVEMENT Project and background information were obtained from the entities listed in Table 1. Table 1 -Contact Information Entity Contact Address Phone Number .:Marc Welbourne P.O.Box 49050 907-837-2209 (ph)City of Port Heiden (Mayor)Port Heiden,AK 99549 '|907-837-2248 (fx) Native Council of Port Henry Matson Jr.P.O.Box 49007 907-837-2296 (ph) Heiden (President)Port Heiden,AK 99549 907-837-2297 (fx) Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 2 February 2006 3.0 APPLICABLE REGULATIONS AND CODES The proposed improvements must be designed,constructed and operated in accordance with applicable sections of the following state and federal regulations: State of Alaska Fire and Life Safety Regulations,13 AAC 50. 2003 International Fire Code,as adopted by 13 AAC 50. 2003 International Building Code,as adopted by 13 AAC 50. U.S.Environmental Protection Agency EPA Oil Pollution Prevention Regulations, 40 CFR Part 112. Alaska Department of Environmental Conservation Air Quality Regulations,18 AAC 52. Regulatory Commission of Alaska (RCA)Certification,3 AAC 42.05.221. National Electric Code,NFPA 72 National Electric Safety Code,ANSI C2 Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 3 February 2006 4.0 EXISTING POWER GENERATION AND DISTRIBUTION FACILITIES 4.1 DESCRIPTION OF EXISTING FACILITIES Visual inspections of Port Heiden's electrical distribution and power generation systems were conducted during the initial site visit.The following sections include descriptions of each system and pertinent field observations. 4.1.1 Power Plant The Community's existing power plant,located approximately 500 feet west of the Meshik Subdivision (Figure 2),is a relatively new,metal-framed building that doubles as the City's fire station.The structure has a concrete slab-on-grade foundation,overhead garage doors and a separate room for the diesel generator cooling system (Photos 1 and 2);the plant's rated power generation capacity is 430 kilowatts (kW)from a combination of two generators (one 230 kW and one 200 kW unit).The 480-volt switchgear includes a breaker for each generator unit,and a breaker for the single feeder line to the three phase,wye-wye connected,150 kVA pad mount step-up transformer located in front of the building.Currently,no heat is recovered from the generators. 4.1.2 Distribution System The existing underground electrical distribution system was inspected during the initial site visit,and the conditions of all visible appurtenances were documented.Port Heiden's electrical distribution system consists of approximately 24,000 feet of three phase and 16,000 feet of single phase underground,direct bury primary voltage cable. The primary line operating voltage is 12,470/7200 grounded wye.At least three different types of #2 aluminum primary conductors are present in the distribution system,including two bare concentric neutral types (with 175 and 220 mils of XLPE insulation respectively)and a third,jacketed concentric neutral type,with 220 mils of insulation.Conductors of each type were observed at above grade connection points throughout the system;other types of conductors may also be present.Secondary voltage and service conductors are reportedly aluminum direct bury triplex and quadraplex types,for single and three phase lines respectively.Primary and secondary conductor sizes and configurations should be verified by the installer prior to procurement. Other distribution components include thirteen 25 kVA single phase transformers,five 150 kVA three phase transformers,and approximately 60 socket-type residential electric meters.These components were reportedly installed with the original buried system. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 4 February 2006 4.1.3 Equipment Suitable for Reuse Portions of the existing buried distribution system may be suitable for continued use. The actual extent of reusable conductor should be delineated by the electrical installer prior to beginning procurement.Many of the existing residential meters and meter bases also appear to be suitable for re-use if properly cleaned.The existing 12,000 gallon intermediate fuel storage tank at the power plant was installed as part of the AEA bulk fuel upgrades project and is suitable for reuse (Photo 3). 4.2 EXISTING POWER GENERATION CAPACITY AND DEMAND There are two diesel generator sets within the existing power plant,with a combined potential capacity of approximately 420 kW.Individual generator capacities include: e Unit 1-Cummins Generator and Engine 230 kW,480 volts,1,800 RPM e Unit 2-Magnaplus Gen /John Deere Engine 190 kW,480 volts The historical peak demand reported by the community to the AEA was 175 kW recorded in the winter of 2000.Additional community power consumption information is provided in Section 5.1.1 Historical Electrical Demand. 4.3.EXISTING SYSTEM DEFICIENCIES The existing power plant facility is in fair overall condition.The Cummins gen set has high hours but continues to operate reliably.The John Deere genset,which was purchased by the City in 2005 via a loan from the Alaska Industrial Development and Export Authority (AIDEA),looks to be in excellent condition.However,a qualified diesel generator mechanic should inspect both generators prior to considering them for reuse. In particular,the generators should be checked for possible damage incurred due to the existing wye-wye step up transformer configuration;this configuration exposes the gen sets to potentially damaging shock loads whenever the distribution system experiences a fault (severed conductor,failed transformer,etc). The majority of distribution system components are reportedly more than 20 years old, although some buried components might be significantly older.Most visible components of the distribution system are in poor condition.All pad-mounted transformers exhibit severe external and interior corrosion and/or physical damage,and are at the end of their useful design lives (Photos 6 and 7).No transformer oil leaks were observed during the site visit,but several transformer tanks are seriously compromised and oil leakage is inevitable if measures are not taken to repair or replace the units. Power outages are a common occurrence and are likely the result of damaged insulation and corrosion of the buried conductors.The City has replaced primary and Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 5 February 2006 secondary conductors as required over the past twenty years.However,the majority of this work was not done by qualified lineman and the quality of the repairs is suspect.In particular,several sections of primary conductor (totaling several thousand feet)were intentionally routed above grade and now rest directly on the ground surface.Several of these high voltage lines cross gravel roadways and are regularly crossed by vehicular traffic.It is suspected that typical burial depths for the existing system are less than 12 inches,providing minimal protection from environmental and/or vehicular traffic related stresses. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 6 February 2006 5.0 FACILITY DESIGN AND SITING RECOMMENDATIONS 5.1 ELECTRICAL CAPACITY CONSIDERATIONS Electrical demands in rural Alaskan communities,while relatively small in overall magnitude,tend to be more variable than those for larger communities.This is due to dynamic fluctuations in seasonal populations,temperatures,local industrial activities, and other factors.Properly sizing power generation systems for these communities requires the integration of hard data,such as historical consumption records,with socio- economic trends,such as projected housing and population growth,planned infrastructure improvements,and the applicability of alternative energy sources and emerging energy system control technologies. The following sections summarize the historical electrical usage in the community,and identify factors such as planned infrastructure improvements,alternative energy sources,and shifts in population that were considered in sizing the proposed system. 5.1.1 Historical Electrical Demand Port Heiden participates in the State's Power Cost Equalization (PCE)Program and is required to submit monthly reports to the AEA itemizing a myriad of power system related parameters,most notably the quantity of electric power generated and sold,as well as peak monthly electrical demands.Historical PCE report data was analyzed to determine trends in the community's energy consumption.The historical trend appears to indicate that the community's power consumption has remained relatively consistent and averaged approximately 101 kW per year.Using the historic ratios between average and peak loads in the community,the current instantaneous peak is assumed to be approximately 160%of the average demand,or approximately 162 kW (Appendix B).Table 2 summarizes the historical power consumption data analysis. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 7 February 2006 Table 2 Historical Demand Data [Column A][Column B] Year Annual Annual Average Annual Peak Load Peak Load Factor Consumption (kWh)Load (kW)(Dec-Feb)(kW)(B/A) 1998 959,000 110 N/A -- 1999 950,000*108 162 . 1.5 2000 988,000 113 175 1.6 2001 993,000*113 160 1.4 2002 990,000*113 N/A -- 2003 857,000 98 N/A -- 2004 724,000 83 N/A -- 2005 630,000 72 N/A -- *Value extrapolated from partial year data. N/A -Information not available. 5.1.2 Planned Infrastructure and Capital Improvement Improvements Infrastructure improvement projects tend to increase community electrical demands. The scope and anticipated impact of planned infrastructure improvements are discussed in the following sections. 5.1.2.1 Water System Improvements The City recently completed a Sanitation Improvements Feasibility Study funded through a grant from the State of Alaska Village Safe Water Program.Further,the City has secured funding to construct several new individual residential wells,a new washeteria/water treatment plant and a community watering point.These improvements,along with possible future sewer and sanitary landfill upgrades,are anticipated to boost residential and commercial development within the community, causing populations and energy consumption rates to increase.For the purposes of this report it is assumed that an additional 15 kW average load (approximately 130,000 kWh per year)will be required to support these improvements. 5.1.2.2 Community Seafood Processing Facility Port Heiden is actively pursuing design and construction funding for a new seafood processing and cold storage facility.As currently envisioned,the project would include Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 8 February 2006 a 2,000 square foot building complete with drying and flash freezing equipment.The proposed site for the facility is near the proposed power plant location,allowing for beneficial use of heat recovered from the plant's generators.It is estimated that a facility of this type would operate approximately 10 hours a day for 2 months per year. Assuming an average demand of 100 kW,the plant would require approximately 60,000 kWh per year. 5.1.3 Projected Community Growth Historical census data shows that the population of Port Heiden steadily increased between 1960 and 1990 at an average rate of 1.6%per year,reaching a peak population in 2000 of 119.Over the past five years,the population has declined to approximately 90 residents.Local leaders attribute this downswing in population to the lack of a regional processor for local fishermen to deliver to,and capital improvement projects in adjacent communities drawing working age residents away. | Completion of the infrastructure improvements discussed in Section 5.1.2 is expected to increase the availability of jobs and draw residents back to the community;for the purposes of this report,an annual growth rate of 1.5%is assumed,resulting in a design population of 105 in 2015.The resulting increase in electrical demand,assuming 5 new houses are required to accommodate the added population,is 40,000 kWh per year. 5.1.4 Projected Electrical Demands The energy consumption and average demand estimates for the design year are presented in Table 3.The annual baseline kWh consumption was calculated from an average of historical demand values (see Section 5.1.1).Future values were determined by combining the demands due to infrastructure improvements and community growth discussed above with the calculated present demand.The instantaneous peak demand in the design year was calculated by applying the peak load factor of 1.6. Table 3 -Projected Electrical Demands Baseline Consumption (2005 PCE Data)630,000 kWh Estimated Increase Due to Capital Improvement and Community Growth 230,000 kWh (Sections 5.1.2.1 -5.1.3)) Estimated Consumption at Design 860,000 kWh Average Demand at Design 98 kw Instantaneous Peak Demand at Design (PF =1.6)157 kW Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 9 February 2006 5.2 DESIGN CONSIDERATIONS 5.2.1 Climate Port Heiden lies in the maritime climate zone.Average temperatures range from 50 °F in July to 25 °F in January.Precipitation averages 16 inches of water per year, including 51 inches of snow.There are frequent winds and severe storms in the winter and calm,often foggy weather in summer.Design snow loading for the community is AO pounds per square foot.Design wind speed is 110 miles per hour,exposure D. 5.2.2 Natural Hazards The potential natural hazards resulting from the community's physical location are numerous including,among others,earthquake,tsunami and volcanic eruption.The potential for flooding at the proposed new power plant site is low.According to the U.S. Army Corps of Engineers (COE)flood management database,no known flooding has occurred within the community. 5.2.3 Geotechnical Conditions Geotechnical investigations completed to date include two test holes dug to a depth of 10 feet at the proposed power plant site using the City's backhoe.The soils at the proposed site consist of 6 inches of gravel topping followed by 6 to 12 inches of organics which are underlain by 8 to 9 feet of silty sand with 1 inch minus broken pumus stone to depth. 5.2.4 Borrow Sources,Ownership,Material Costs There are two established local borrow pits -one is owned by the Bristol Bay Native Corporation (BBNC)and located in town;the second pit is controlled by the Alaska Department of Transportation (ADOT)and is located at the airport (Photo 8).Both pits consist of relatively clean gravels which have been successfully used on multiple road and foundation projects in the community. Permits and the payment of royalties to the state or BBNC ($1 to $3 per cubic yard)will be required for all borrow extraction operations. 5.2.5 Site Control During the site visit,a location for the power plant was identified by the community.The site lies within an un-subdivided,City-owned tract of land located just north of the City shop and approximately 300 feet south of the School lot.A copy of the City's deed for the property is included in Appendix C. All distribution system improvements should be constructed in existing rights-of-way,or established permanent easements.If construction activities require crossing private land the appropriate easement documents should be prepared prior to construction. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 10 February 2006 5.2.6 Alternative Energy Sources Diesel generators are typically considered the simplest and most reliable method of power production in rural communities.However,rising fuel costs and mounting regulatory concern over fuel spills and power plant emissions warrant a close evaluation of potential alternative energy sources.With proper planning,design and management, today's alternative energy technologies could reduce the region's dependence upon fossil fuels in the future.Brief discussions of some fuel-saving technologies are proved below. 5.2.6.1.Wind Turbine Power Generation Wind Resource The AEA conducted wind resource monitoring in Port Heiden in 2004/2005 and found low turbulence winds suitable for development.The average wind power density was found to be 490 W/m'at a height of 30 meters which translates to a Wind Power Class of 5-6 on a scale of 1-7.A copy of the full wind resource report is presented in Appendix D -a _copy of the report can also be _reviewed.at http://www.akenergyauthority.org/programwind.html.AEA input this resource data into a wind analysis program and developed power production estimates for various wind and wind/diesel hybrid systems.Power production estimates for five production model wind turbines are presented in Table 4. Table 4 -Wind Turbine Power Production Estimates Annual Energy .Rated :.Annual Fue!Displaced Turbine Energy Promction Per G ross @apacity (at Diesel Efficiency of Output (kW)(kWh)14 kWh/gal) Bergey © 10 kW 10 23,300 27%1660 Eregrty 15 171,800 30%12273 MoO |(100 276,100 32%19718 Furanaer 100 337,800 39%24125 Vestas . ° 27 250 718,800 36%51342 The added capital cost of purchasing wind turbines,coupled with Port Heiden's relatively low energy demand,reduces the long term economic viability of multiple wind turbine /diesel hybrid systems in the community.Further,based upon the limited selection of production model wind turbines less than a megawatt in size,the majority of single turbine wind /diesel configurations do not displace enough diesel fuel or reduce diesel engine run times sufficiently to compete with diesel-only or multiple turbine hybrid Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 11 February 2006 systems.Based upon AEA's computer model analysis (Appendix D)a high penetration wind /diesel hybrid system including a single,remanufactured,250 kW wind turbine (Vestas V-27 or equal)has the best potential for long term economic viability in the community.The initial construction estimate for the wind portion of a single turbine design,if built in conjunction with the diesel power plant,is approximately $650,000. Modeled with medium to high future fuel costs,the initial investment for a single turbine would be recovered in approximately 15 years.Multiple wind turbine scenarios generally provide better power quality and allow for wind power production to continue when one turbine is down for maintenance or repairs.Integrating multiple wind turbines into the Port Heiden generation system would cost from $1 to $1.5 million. These cost estimates are based upon limited computer modeling and_field investigations.A detailed geotechnical investigation is necessary to prepare foundation designs and better quantify the costs prior to construction. Port Heiden has a good wind resource.However,due to limited funding and the additional capital costs associated with adding wind are prohibitive at this time.If the City is able to secure additional funding for the wind system then AEA could more easily support design and construction activities.The $650,000 to $1,500,000 needed for a wind-diesel system could come from federal or state grant agencies or regional entities interested in community sustainability and economic development. 5.2.6.2 Heat Recovery Heat recovery technology,sometimes referred to as co-generation,provides a means of reclaiming energy lost to heat during the burning of fossil fuels.Co-generation systems in rural Alaska typically consist of a heat exchanger connected to the liquid cooling system of power plant diesel generators.The exchanger draws heat from the engine cooling system to supplement heat-reliant processes in the power plant and adjacent buildings.Common implementations include pre-heating hydronic system return water to reduce boiler firing frequency,and heating raw well water to make treatment easier. No heat is recovered from the generators at the existing power plant.As currently envisioned,the new diesel plant will incorporate a co-generation system to supplement the heating systems in the school and city shop,and provide beneficial heat to the future fish processing plant. 5.2.6.3 Geothermal | Although the potential for geothermal power production may exist in the region,no studies have'been conducted to evaluate the feasibility of harnessing geothermal energy to date,and the City has no plans of pursuing such an investigation in the future. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 12 February 2006 5.2.6.4 Hydro-electric Hydro-electric power generation would probably involve the installation of remote hydro turbines and dams,and require relatively long electrical transmission lines.No known studies have been conducted to evaluate the feasibility of hydro power generation in the area,and the City has no plans of pursuing such investigations in the future. 5.2.6.5 Solar Photovoltaic Power The typical solar energy system consists of multiple arrays of photovoltaic panels situated on top of buildings,towers or other relatively high structures.The fact that sunlight intensity varies from minute to minute due to changes in cloud cover,smoke from fires,blowing dust etc.,requires that most solar systems have substantial battery storage.Due to the dramatic solar radiation fluctuations in northern latitudes and the practical limitations of storing and disposing of battery banks,solar systems are rarely capable of providing more than a minor amount of the total power necessary for a community.However,residential scale solar installations may be capable of meeting essential household electrical demands during the summer months. 5.3 PROPOSED UPGRADES 5.3.1 Scope of work The proposed scope of work is listed below.Detailed discussions of each proposed upgrade are provided in following sections.Conceptual design drawings for the proposed upgrades are provided in the appendices. e New diesel power plant consisting of a 16-foot X 44-foot pre-fabricated module with a total rated capacity of 460 kW.The planned switchgear will incorporate remote monitoring capabilities and allow for seamless integration with future wind turbines or other alternative energy technologies. e Approximately 500 feet of buried,insulated,circulating hydronic line and appropriate heat exchanging components to allow for recovered heat from the power plant's engine jacket water to be utilized by the school and/or City shop. e Replacement of all exposed primary voltage cable and select repair of buried portions of primary voltage distribution system (approximately 3,000 feet total). e Replacement of all exposed secondary voltage cable and select repair of buried portions of secondary voltage distribution system (approximately 1,000 feet total). e Replacement of all existing pad-mount transformers in the community (13 single phase and five three phase)with new marine grade units. e Replacement of approximately 30 residential electric meters and boxes. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 13 February 2006 e Disconnection of electrical service west of the bulk fuel tank farm to reduce line losses and help balance system loads. 5.3.2 Power Plant Upgrades Due to the age and questionable condition of the power generation and switchgear components,and the inherent dangers associated with co-location of the power plant and fire hall,it is recommended that a new dedicated power generation facility be constructed at the site selected by the community during the initial field inspection.The site is located near the existing City shop,approximately 200 feet south of the school. The site is owned by the City;the site's close proximity to the shop and school provides opportunity for beneficial use of recovered engine heat. The proposed diesel power plant consists of a 16-foot x 42-foot module which will be pre-fabricated in Anchorage and shipped with all motors,switchgear and other components already installed.The plant will house three diesel generators with a combined capacity of 460 kW (two 190 kW and one 80 kW genset)and include room for a fourth generator in the future.The planned switchgear will incorporate remote monitoring capabilities and allow for seamless integration with future wind turbines or other alternative energy technologies.A heat exchanger at the plant combined with buried,insulated hydronic lines will allow for recovered heat from the engine jacket water to be utilized at the school and/or city shop. Fuel for the plant will be stored in an existing 12,000-gallon,double walled intermediate tank currently located adjacent to the existing power plant building.The intermediate tank will be relocated to the proposed site and filled periodically via a City-owned fuel truck. 5.3.3 Distribution System Upgrades 5.3.3.1.Tie In to Existing Distribution System The proposed power plant will have a single 3-phase feeder which will tie into a new pad-mount,step-up transformer installed adjacent to the module.New buried conductors will connect the step-up transformer to the community's existing electrical grid. 5.3.3.2 Transformers The community's current electrical distribution system includes thirteen single-phase (25 kVA)and five three-phase (150 kVA),pad-mounted transformers with load break primary bushings and a feed through bus on the single phase units.As previously mentioned,all transformers have surpassed their useful lives and should be replaced. Marine grade,pad-mount transformers with stainless steel tanks and fiberglass or stainless steel enclosures are recommended for all new units. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 14 _February 2006 5.3.3.3 Primary Voltage Distribution System Upgrades All exposed direct-bury cable should be replaced with code-compliant conductors.All buried cables should be located and tested for current leakage.Lines that fail the continuity tests should be repaired.All new conductor will be installed within NEC approved conduit. 5.3.3.4 Secondary Voltage Distribution System Upgrades All exposed secondary conductors should be replaced (approximately 1,000 feet);all buried secondary conductors should be located and integrity tested prior to final design and repaired as necessary.All new secondary conductor will be installed within NEC approved conduit. 5.3.3.5 Service Connections All existing meters and sockets should be cleaned and tested.It is estimated that 50% of the meters and sockets will require replacement (approximately 30 new installations). Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 15 February 2006 6.0 PERMITTING 6.1 GENERAL This section describes,in broad terms,the permitting methodology successfully used for past RPSU projects in similar communities.Any future addition of wind energy components will likely require additional review by the U.S.Fish and Wildlife Service, the FAA,the Coastal Zone Management Program and,depending upon the selected sites and access road alignments,the Corps of Engineers. 6.2 COASTAL ZONE MANAGEMENT Projects for communities in coastal regions,such as Port Heiden,must complete a Coastal Project Questionnaire in accordance with the Alaska Coastal Management Program.The questionnaire is submitted to the State of Alaska Department of Natural Resources,Office of Project Management and Permitting (ADNR).The ADNR reviews the questionnaire and assists in identifying required permits for the work.The ADNR review and public comment periods typically takes 60 days or more to complete. 6.2 FIRE MARSHALL REVIEW Before construction of the new power plant begins,a set of stamped construction drawings must be submitted,along with the appropriate fee,to the State of Alaska, Department of Public Safety,Division of Fire Prevention (Fire Marshal)for plan review and approval.After review and approval,the Fire Marshal issues a Plan Review Permit to verify compliance with applicable building,fire,and life safety codes.Review times depend upon the agency's current work load;typically,a minimum of one month is required for review. 6.3 U.S.ARMY CORPS OF ENGINEERS WETLANDS FILL PERMIT Projects that result in the placement of fill in wetlands require a Department of the Army (DA)permit.The proposed power plant site is located on an existing fill,and no DA Permit is anticipated. 6.4 NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) In accordance with the National Environmental Policy Act an Environmental Assessment (EA)must be completed prior to construction of the project.The EA format should be based on the guidance documents provided in the AEA Reference Manual. The EA process should include the development and distribution of a project-scoping letter to all interested agencies.Responses from the agencies should be attached to the EA checklist as justification for a Finding of No Significant Impact (FONSI)for the project.AEA will act as the lead agency for FONSI determination. Port Heiden Power System Upgrades Project ,CRW Engineering Group,LLC. Conceptual Design Report-FINAL 16 February 2006 6.5 ADEC REVIEW ADEC regulates the operation of diesel power plants with the potential to emit more than 100 tons of dioxides per year (roughly equating to a diesel power plant with a generation capacity greater than 540 kW).The proposed power plant will be rated at 460 kW and,therefore,should not require an ADEC air permit. 6.6 RCA CERTIFICATION Public utilities which meet certain criteria must obtain a Certificate of Public Convenience and Necessity (CPCN)from the Regulatory Commission of Alaska (RCA), which describes the authorized service area and scope of operations of the utility.The City of Port Heiden was issued a certificate by the RCA in 1988 (Certificate #399).The RCA requires that a utility update their CPNC after any major facility upgrade or operational change.To update the CPNC,the utility must complete and submit the RCA form entitled "Application for a New or Amended Certificate of Public Convenience and Necessity”,which is available on the RCA website. 6.7 FAA REVIEW Proposed projects within 5 miles of any airport runway must be reviewed by the FAA. The permitting process is initiated by completing and submitting the Federal Aviation Administration (FAA)Form 7460-1 "Notice of Proposed Construction or Operation”to the FAA Alaska Regional Office for review. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 17 February 2006 7.0 CONSTRUCTION PLAN 7.1 ADMINISTRATION The AEA has a history of administering projects on a modified force-account basis. Under AEA's construction guidelines,a construction management firm is selected to act as the project employer and is encouraged to utilize primarily local labor.This method tends to achieve a higher percentage of local hire and is strongly supported by many communities and funding agencies. The technical nature of the project will require a limited number of workers with specific experience and expertise to be brought in when not available locally.All work should be supervised and managed by a superintendent with extensive experience in the construction of rural power facilities.Skilled craftsmen,with appropriate certifications, must perform all specialty work,such as pipe welding and electrical panel installation. An experienced Construction Manager will be required to recruit the necessary skilled labor,coordinate the construction team,and oversee procurement and project logistics. The Design Engineer should provide quality control through communication with the Construction Manager,submittal reviews and periodic on-site inspections. 7.2 LOCAL LABOR SKILLS A request was sent to the community for information regarding the availability of local labor to assist with construction.A summary of resources,per community response,is listed in Table 5. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 18 February 2006 Table 5 -Local Labor Pool Name of Individual Laborer |Operator Truck Welder's ApprenticeDriverHelperElectrician Hank Matson v v Jens Carlson v v Andrew Lind ¥v Ryan Christensen v v Konan Lind v v Jamie Matson v Alvin Matson v Eli Nakita v v Travis Onoff v Jeffrey Orloff v John Christensen v v John Dundass v Teddy Matson v John Matson v Archie Reid v David Reid v Micheal Kalmakoff ¥ Walter Nudlash v Dan Barker v Stephanie Anderson v Edward O'Domin v 7.3 LOCAL EQUIPMENT The Community owns several pieces of heavy equipment;the type and condition of each piece of equipment is listed in Table 6. Table 6 -Locally Available Heavy Equipment one Make Model Attachments General Condition Loader Cat _950B Bucket Fair Cat D3 Blade Fair Dozers JD 850 Blade Fair 7.4 ACCESS/LOGISTICAL CHALLENGES Port Heiden has a State-owned 5,000 foot long by 100 foot wide lighted,gravel runway and a 4,000 foot long,lighted cross-wind runway.Scheduled air services are available daily from King Salmon.There is a natural boat harbor,but no dock.Barges typically CRW Engineering Group,LLC. February 2006PortHeidenPowerSystemUpgradesProject Conceptual Design Report-FINAL 19 deliver cargo once or twice a year.Goods and passengers are lightered to the beach by landing craft.Lodging is generally available through the City Council or at the Carlson Lodge. 7.5 CONSTRUCTION SCHEDULE The construction schedule presented in Table 7 is for conceptual planning purposes only.Once construction funding is secured,the Construction Manager should refine this schedule,taking into account freight options,subsistence activities,commercial fishing seasons,and other local factors that could affect construction costs or the availability of local labor.The proposed project schedule,subject to availability of funding,calls for design and permitting during the spring and summer of 2006 with construction beginning in the fall of 2006.It is anticipated that all construction will be complete by fall 2007. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 20 February 2006 TABLE 7 PROJECT SCHEDULE PORT HEIDEN RURAL POWER SYSTEM UPGRADES Task 2005 2006 TimeNovember December January February March April May dune July August September October November Oecember January February March 2007 PHASE t TASKS Aprit May June July Conceptual Design Report Complete Draft CDR and Site Visit AEA /Community Review Finalize COR Business Plan (Draft)7w PHASE Il TASKS Site Control /Utility Easements 22w Design -Power Plant/Distribution System Upgrades 65%Design 6w AEA Review iw 95%Design 4w AEA Review iw Final Design 4w Final Business Pian Preparation /Signing 6w Permitting Environmental A it Preparation 12w Fire Marshall Review 4w PHASE lil TASKS Pre-Construction Activities (Power Plant/Distribution System} Procure Generators /Switchgear 12w Fabricate and Ship Module 24w Procurement &shipment of Distribution Components 24w 'Construction Activities (Power Piant/Distribution System) Mobilization 3w Construct Power Plant Foundation 2w Instali Underground Primary and Secondary Conductors 16w Power Plant Tie In and Startup 4w Decommission Existing Systems 4w Project Closeout Final Inspection and Punchlist Completion 6w -_ Port Heiden Rural Power System Upgrades Conceptual Design Report 21 CRW Engineering Group,LLC February 2006 7.6 CONCEPTUAL CONSTRUCTION COST ESTIMATE A conceptual cost estimate for the construction of proposed improvements is included in Appendix E.The estimate includes labor,materials,and shipping costs for all project components.The cost estimate was developed based upon the power plant module design and cost information provided by Alaska Energy and Engineering,and the assumption that a "modified"force-account approach,utilizing a combination of local labor,certified craftsmen,and specialty sub-contractors under the direction of an experienced Construction Manager would be used to construct the improvements. Labor rates are based on Title 36 equivalent wages for certified specialty labor and prevailing local force-account wage rates for general labor and equipment operation. The total cost of the proposed diesel power system including design,supervision, construction,inspection,permitting,and insurance is estimated to be $1,649,000. Port Heiden Power System Upgrades Project CRW Engineering Group,LLC. Conceptual Design Report-FINAL 22 February 2006 FIGURES /PHOTOS PROJECT LOCATION I=WINGS\FIGURE].DWGRie% ie :$:wes OC ee ae ai See, 'a seanakehal "1 GRAPHIC.SCALE'FILENAME:3040).10\\CADD\DRA*e *ALASK. 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Q site lle sill PROPO ,NO CIRCULATINGwwGLYCOLLINES SQ CITYOFPORTHEIDENPOWERPLANTSITEPLANFIGURE3SA Ailey ay ww ail _{BY|DATEfiSO COMMUNICATION SS rr cn ioBUILDINGS(GCI):Ss.re re REV]DESCRIPTIONa .5 aL \4 7 :.7 ;SN .;:.':me / TIE INTO SCHOOL -*\-'MECHANICAL ROOM------30401_10BASE.dwgpoteAUGUST2004][-[=JAM-_aed|DesignedG)||prawnppGi[[ApprovedSHEET.fe)a NTN 7 \7][7VENTILATION>}|LLHOOD,TYP(4)-=1c=>L | RADIATOR,TYP(2)Ty)i ) R-1 R=2 GENERATOR #1,190kW :(e DA ||==> [| |Aw (GENERATION ROOM]EF-1 AIK GENERATOR #2,190kW | (oe f=» RADIATOR VFD vCONTROLPANELS 29Er-2 x GENERATOR #3,80kW GL. (ee): i” | PANEL SS-1 WH---__]50 STATION SERVICE SED OIL &_! 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V3vV/V3qlv S30VYNdN WALSAS YIMOd Tan rae quewdojeaeq BIWOUoS PUud NSdY'NIGIGH LYOd ON3Wi Ayjunwiwoy jo yuawy20deq ywefoag]|25 DxSO|Y JO 9}0}S i iTTTAnsaeseeeneeenl fe ae ge ee 4 Fen un ee pbatlingaee ,000 Gallon Intermediate TankPowerPlantBuildingand12Photo1-Existin igs en ee RienSeaoaefo ero Photo 2-Power Plant Interior (JD Genset) + vg ak, WR A tee*sere ih ee a naeactiMeal Photo 3-eens 12,000 Gallon Tank To Be Relocated x."venteWO aCroanbesteer Photo 4.Proposed Power plant Site (Pad Beyond Dozer) So itSe uhsanaFave Photo 5-Exposed Primary Cable Strung Along Ground'Seyyya 'Photo 6-Typical Existing Transformer,Door No Longer Attache were 18%onan 41 ETNa]EM”*Seay eI toyS : Regt Petr a Ua os "j LY EY EDT OgA gy:tM he Lope Weeot de!Oe Fe Re=FidelnerNasnodPeenie fe|APPENDIX A SITE VISIT REPORT AND ELECTRICAL SYSTEM INSPECTION REPORT TRIP REPORT CRW Engineering Group 3900 Arctic Blvd.Suite 203aCRVAnchorage,AK 99503 ENGINEERING GROUP LLC (907)562-3252 FAX 561-2273 TRAVEL DATES:6/19/03 to 5/20/03 PROJECT:Port Heiden Rural Power System Upgrade Project LOCATION:Port Heiden,Alaska PARTICIPANTS:Karl Hulse,CRW Jim Hall,EPS Lenny Landis,AEA REPORTER:Karl Hulse PURPOSE:initial Site Reconnaissance LOCAL CONTACTS:Lynn Carlson,Mayor John Christensen Sr.,Village Council President Jens Carlson,Power Plant Operator ACTIVITIES: 6/19/03 Karl Hulse arrived at the Anchorage Airport at 7:00 a.m.and met Lenny Landis of AEA and Jim Hall of EPS for the 7:45 flight to King Salmon.The site visit crew arrived at King Salmon at 9:00,and proceeded to the Pen Air gate to catch the 10:30 flight to Port Heiden.Poor weather prevented further travel that day and the site visit crew spent the night in Dutch Harbor.The crew arrived in Port Heiden at 12:00 pm.Mayor Lynn Carlson met the crew at the airport and accompanied them to the City Office (Ray's Place).After dropping off luggage at the Carlson Lodge,the crew proceeded to inspect the community's power generation and electrical distribution systems. Major observations noted during the inspection are listed below. Existing Power Plant- 1.The power plant currently houses two generators,one 230 kw and one 200 KW.The only fully functioning generator in the community is the 230 KW unit. 2.The generation step up transformer has a wye-wye connection which results which results in severe fault duty on the generator windings and could Trip Report-Port Heiden,Alaska damage the diesel generator windings in the event of a fault or short in the distribution system. Due to the wye-wye wiring,the condition of the only operating generator is questionable. The generators receive fuel via a 100 gallon day tank and pump located within the building.The daytank pump pulls fuel from a 12,000 gallon double wall tank located within a fenced area adjacent to the building.The intermediate tank and day tank were installed as part of the recent bulk fuel upgrades project funded by AEA. Proposed Power Plant Site- 1. 4. The general consensus is to construct the new power plant on a parcel of land southwest of the existing school lot.This location is relatively close to the bulk fuel tank farm,reducing the fuel haul distance,and would provide the option of using recovered heat to help heat the school and a proposed future fish processing plant planned for the area. The proposed site is located on an existing gravel pad more than 10 years old. Locally available fill material consists of angular rock obtained from an established borrow pit in town or from the ADOT pit located near the airport. Material from the pit has been used successfully on many road and foundation projects in the community. The preferred area is not subject to flooding. Existing Distribution System- 1. 2. The existing distribution system consists of approximately 40,000 feet of direct buried conduit.The system is approximately 20 years old. The community's current electrical distribution system includes thirteen single-phase (25 kVA)and five three-phase (150 kVA),pad mounted transformers with load break primary bushings and a feed through bus on the single phase units.All transformers have surpassed their useful lives and should be replaced. No as-builts were available for the buried system-Jim Hall drove the entire community and sketched the existing distribution system. No major problems have occurred with the buried power cables to date. However,the age of the system increases the potential for problems in the near future. Potential Wind Generator Sites- 1.The most probable site for installing a wind turbines appeared to be the ridge just south of Ray's Place.A portion of the ridge is reportedly owned by the City,and the topography and orientation of the ridge appear suitable. EClectric Power SystemsSenc. iy Wy Consulting EngineersecSYSTEMStM Village of Port Heiden Electrical Power System Inspection July 2003 PHONE (907)522-1953 ¢3305 ARCTIC BLVD.,SUITE 201,ANCHORAGE,ALASKA 99503 ¢FAX (907)522-1182 *WWW.EPSINC.COM Prepared by: James D.Hall,P.E. David Burlingame,P.E. PHONE (907)789-2474 *2213 JORDAN AVE,JUNEAU,ALASKA 99803 ¢FAX (907)789-4939 PHONE (425)883-2833 *3938 150 AVE.N.E,REDMOND,WASHINGTON 98052 ¢FAX (425)883-8492 Lo] al CRW PORT HEIDEN INSPECTION REPORT Table of Contents 1. 2. 3. 4. 5. 6. Scope of Work.3 Existing Power Generation and Distribution Facilities.3 2.1.Description of Existing Facilities 3 ZL1.Power Plant 0...sscssscssssssceseesseeensetseeescecsevensensnsceseseeesssevecsssesesseusssssssesssesssssnesssseaesssesesuensstesssssssensesseansnesussessseess 2.1.2.Distribution System 2.1.3.Equipment Suitable for Reuse...cscecssssssssesessssesesescsesscsssessescscenssesnssssssusssseaesnensnsnenssessesseassessesesesaessusseserseeeeeeses 4 2.2.Existing Power Generation Capacity 4 2.3.Existing Power Generation and Distribution System Deficiencies.5 Recommended Improvements 6 3.1.Distribution System Improvements 6 BLL.Transformers 0.0....scecsssessssssscssesstscsseneceesceronsscesensnsenssesesesesesucussssecaseceascescasscuecsaseescuseeeaesacesssensesiseanescressretesssaseess 6 3.1.2.Buried Distribution System...cssesssecsserssesesececeseccseesseeesceeessnsscsecescsescatacsesseeeansessesseecesseessnenseasesserevseaeeeneasees 6 3.1.3.Service Connections 3.2.Diesel Power Generation Facility Improvements 7 3.2.1.Planned Infrastructure Improvement .............:cssssscsssesesesssessssssssesesssesessessnenesssseessessensssestesusenesseressaesesseessssseeeeseanses 7 3.2.2.Recommended Electrical Generation Capacity...........ccssssssssssesscssssssesesssssserssessesssssessesesensoesscessseecesesssesssesesssesaeatas 3.2.2.1.Diesel Generator Sizes and Switchgear Considerations.............:ccceeeeee 3.2.3.Tie in /Synchronization to Existing Distribution System Distribution System Improvement Cost Estimate.8 Appendix A 9 Appendix B.10 6.1.Pictures 10 GALT.Generators...esseeessessesessesesesssevsessersesssseusessssssassssssssevsusssesevensscaeesanensossssesetanesussesseatentenseseenstanesgeesesesenenneseeaes 10 6.1.2.Single Phase Transformer ............cccsccsscesceesccessseceesccecsecseneeesecensensensessenssanssssssacsasseesseasceeeessssaessesseecessssscressesersees 11 6.1.3.Secondary Pedestal &Conductor .........cccccsscsscsescssesscscsceessscnsescsceceaesssssassssseseeesssevesaceeedssssacensorsescesseeceeeseeseasees 12 CRW PORT HEIDEN INSPECTION REPORT 1.Scope of Work Electric Power Systems,Inc.(EPS)was contracted to perform an on-site inspection of the electrical distribution system at Port Heiden,Alaska and develop a list of required improvements and deficiencies.This report will document what was found during the on-site inspection of the electrical distribution system and recommend improvements required for continued service of reliable electrical power. 2.Existing Power Generation and Distribution Facilities 2.1.Description of Existing Facilities A visual inspection of the electrical system in Port Heiden was conducted on June 19,2003.The underground electrical distribution system was toured on foot and by truck to allow good access and close examination.The power plant was also toured. 2.1.1.Power Plant The existing generation plant was possibly installed in 2000.Generator nameplates did not list year of manufacture. The building appears to be slab on grade.The generation units share the building with the village fire truck. The 480-volt switchgear includes a breaker for each generating unit,and a breaker for the outgoing feeder line to the system. The plant is connected to the distribution system by underground conductors via a three-phase 150 KVA padmount stepup transformer.This transformer has a WYE-WYE connection. 2.1.2.Distribution System The distribution system in was perhaps installed in the 1980s. The system consists of about 24,000 feet of three phase underground primary line,and about 16,000 feet of single-phase primary line.The system operating voltage is 12470/7200 grounded wye.The entire system is underground direct buried construction. Primary conductor is of at least three different types.All primary conductors examined were #2 Aluminum,and all insulation examined was XLPE.The first type of conductor inspected had 175 mil insulation and a bare concentric neutral;the second type had 220 mil insulation and a bare concentric neutral;and the third type had 220 mil insulation and a 2.1.3. CRW PORT HEIDEN INSPECTION REPORT jacketed concentric neutral.These conductors were observed where they were exposed above grade.Other conductors may exist. Transformers are pad mount with a load break primary bushings,and a feed through bus on the single-phase units.There are 13 single-phase padmount transformers and 5 three-phase padmount transformers on the system.The single-phase transformers are all reported to be 25 KVA units;the three-phase units (where size could be determined)were 150 KVA units. Secondary conductor and service conductor is probably aluminum underground triplex for single phase,and aluminum underground quadraplex for three phase.Soil conditions are reasonably good for direct burial of electrical conductor. Meters in the community are socket type and were probably installed with the distribution system. Equipment Suitable for Reuse The primary and secondary conductors appear to be in good condition however,the use of direct buried conductor in this location may render the cables not suitable for future use in new projects. 2.2.Existing Power Generation Capacity There are two engine generator sets.They are rated: 230 kW 480 Volts 1800 RPM Cummins Generator Cummins Engine 200 kW 480 Volts 1800 RPM Stamford Generator Cummins Engine The most recent complete year of power consumption records is for fiscal year 2000,at which time the peak load was 175 kW and the average peak was 152 kW. lectric Consulting Engineers 2.3. CRW PORT HEIDEN INSPECTION REPORT Existing Power Generation and Distribution System Deficiencies The generation plant building is in good condition.Due to the heat,fuel, and electricity that are necessary in a generator building,and the inherent risk of fire,it seems a poor arrangement to house the fire truck in the same building.There is no waste heat recovery system from the generation units.One of the engine generator units appears to be in good condition. The other unit appears to be in fair condition but is not presently operated except for maintenance or emergency due to apparent problems with engine bearings.The switchgear appears to be in good condition. The generation stepup transformer has a WYE-WYE connection which results in severe fault duty on the generator windings for faults on the primary distribution system. The distribution system is in generally fair condition.Single-phase transformers are in fair condition.All of the three-phase padmount transformers are in very poor condition.The access doors on these transformers are rusted to such an extent that the doors do not operate properly,and many of the doors are no longer attached to the transformer. No three-phase transformer was properly locked and secured.The doors on these three-phase units can no longer be properly closed and secured;this presents a serious safety hazard,and should be addressed immediately. Though these units have a considerable amount of rust,there is no noticeable oil leakage,but the transformer tanks are seriously compromised, and oil leakage is inevitable if measures are not taken soon to repair or replace these units.These transformers are beyond repair,and should be replaced. The primary conductors appeared to be in reasonably good condition.The different types of cable will require a number of different splice kits,and different types of spare cable for maintenance and repair purposes.Though the primary conductor that was observed in enclosures appeared to be in good condition,the conductor in the ground may be corroded.Primary cable is exposed above grade at several locations.Some of these appear to be the result of beach erosion,and others appear to be emergency repairs that have not been reburied. Meters appear to be in fair condition.Sockets are generally in fair to poor condition,due to rust. CRW PORT HEIDEN INSPECTION REPORT 3.Recommended Improvements 3.1.Distribution System Improvements 3.1.1. 3.1.2. Transformers Due to immediate safety concerns,the transformers that are not properly locked and sealed should be repaired.A temporary solution would be to bolt new hinges and padlock hasps to the existing doors such that they can be secured.These units are rusted beyond acceptable limits and should be replaced.Stainless steel,or galvanized steel transformer tanks should be seriously considered since conditions here result in very rapid corrosion,and replacement costs will be very high. Buried Distribution System The long runs of underground primary cable on the system,and the relatively light system load could result in difficulty in voltage control.Consideration should be given to having an analysis of the system performed,to determine if voltage control problems are likely to be present,and what actions can be taken to solve any such problems. If at a future time there is any section of a primary conductor replaced,it is recommended that a sample portion of the old conductor be sent to a qualified test lab for analysis.To follow are two recommendations: Georgia Technology Research Corp /Neetracc Attn:Angelo Lawton,Research Coordinator PO Box 100117,Atlanta GA 30384 (billing) 62 Lake Muir Building,Forest Park GA 30297-1613 (lab) (404)675-1893 Cable Technology Laboratories,Inc. Attn:Carlos Katz,Chief Research Engineer 690 Jersey Ave,New Brunswick NJ 08903 (732)846-3133 A minimum of six splice kits,two elbow kits,and basic cable preparation tools should be provided for each of the three types of primary cable in use.The correct dies and tools for installing the splices and elbows should also be provided. 3.1.3. CRW PORT HEIDEN INSPECTIONREPORT Service Connections Though the meters appear to be in fair condition,meters should be cleaned and tested due to extended exposure to harsh weather conditions. Sockets are generally in fair condition due to rust,and should be monitored and replaced as needed with aluminum or stainless steel units. 3.2.Diesel Power Generation Facility Improvements 3.2.1. 3.2.2. Planned Infrastructure Improvements The planned future improvements that would impact the power plant design are as follows:a new Septic Tank Effluent Pumping System,a new Washeteria,new Health Clinic Lighting,new Multi-purpose Building lighting,and Airport Improvements. Recommended Electrical Generation Capacity According to the only available data (monthly PCE reports)to compute current average demand and peak loading,fiscal year 2000 was the most recent complete year of recorded history for the previous five years. Thus,calculations show the current average demand to be 112 kw. Factoring in the planned infrastructure improvements,community growth, and an estimated fuel efficiency of 12 kWh/gal,the five year peak would be 218 kW,the 10 year energy would be 1,250,000 kWh,and the 10 year consumption would be 105,000 gallons per year. 3.2.2.1.Diesel Generator Sizes and Switchgear Considerations 3.2.3. Based on the proposed future average demand and peak loads,the recommended generator sizes are two 120 kW generators and one 225 kW generator.The generators will feed switchgear containing PLC controls for demand control. A preliminary cost estimate for a new plant that includes a waste heat recovery system,switchgear with synchronization capabilities, a new building to house up to four generators,and the new generators would be around $450,000. The generators are sized to provide the community with "firm capacity”over the planning horizon of this project.Additional load monitoring is recommended to properly size the generators,as PCE data is adequate for preliminary sizing only. Tie in /Synchronization to Existing Distribution System The generation stepup transformer has a WYE-WYE connection which results in severe fault duty on the generator windings for faults on the primary Gistribution system.Consideration should be given to the use of a pustens. CRW PORT HEIDEN INSPECTION REPORT DELTA-WYE transformer to step up to the distribution voltage as well as to provide zero sequence isolation. The new plant switchgear will provide synchronization functions between the new diesel generators and the distribution system.Consideration should be given to load control components should a wind or hydro generation system be introduced. Distribution System Improvement Cost Estimate The table in Appendix A outlines the recommended distribution system improvements.To follow is a summary of these costs as well as an estimate for the design engineering of these improvements. System Improvements $100,671 Design Engineering $2,680 Construction Staking $2,800 Survey As-built (if required)$7,300 Total $113,451 CRW PORT HEIDEN INSPECTION REPORT 5.Appendix A 07/07/03 PORT HEIDEN,ALASKA Page 1 of 1 Project:Cost Estimate 3 Phase UG Distribution .Material +|ExtendedStructure(s)Task Material Labor Total 150 KVA XFMR|_replace single phase transformer with stainless steel/galvanized unit $8,700 $11,580 $57,900 STEP UP XFMR|_replace generation step-up transformers with padmount step-up transformer $13,500 $19,260 $19,260 RES METERS clean &test residential meters;replace as needed $180 $7,200 COMM METERS]_clean &test service meters;replace as needed $540 $1,620 SPLICE KIT spare splice kits $75 $75 $900 ELBOW KIT spare high voitage elbow kit $40 $40 $160 TOOLS basic cable preparation tools $500 $500 $500 Subtotal $87,540 15 %contingency $13,131 Total $100,671 CRW PORT HEIDEN INSPECTION REPORT 6.Appendix B 6.1.Pictures 6.1.1.Generators Generator #1 Generator #2 -10- CRW PORT HEIDEN INSPECTION REPORT 6.1.2.Single Phase Transformer Rusty Transformer &Sectionalizing Cabinet Doors held closed with ropes -t1- CRW PORT HEIDEN INSPECTION REPORT 6.1.3.Secondary Pedestal &Conductors lectric -12-Consulting Engineers APPENDIX B COMMUNITY ELECTRICAL DEMAND ANALYSIS PORT HEIDEN HISTORICAL ELECTRICAL LOAD DATA Avg Peak Demand |DemandFiscalYear|Calendar Month |Generated (kWh)|(kW)(kW)1998:July;61,680;83 112 1998 August 71,160 96 130) 1998 September 76,320 106 130) 1998 October 76,320)103 : 1998 November!89,560 124 +1998 Summary1998)December)87,840 118 -|Avg Demand 110 1998 January 91,920 124 -|Peak Demand 130 1998 February'-_,94,680 141 Peak %of Avg 118.7%1998)March 83,040 112 : 1998:April;82,233 114 + 1998 May 64,172 86 130 1998 June 80,331 112 130 1999 July:76,320)103 - 4999:August 76,320;103 + 1999 September,+"+ 1999 October}.-+ 1999;November:-:1999 Summary1999)December +-Avg Demand 97 1999 January;+:162.Peak Demand 162 1999 February'99,720 148 -|Peak %of Avg 167.9% 1999 March 10,500 14 E 1999 April;76,800 107 E 1999 May;81,480;110 - 1999 June 72,000 100 : 2000 July)68,760 92 96 2000)August!71,160 96 125 2000:September,84,840 4118 155 2000 October;74,280 100 160 2000 November;100,560 140 175:2000 Summary 2000 December 126,840 170:175 Avg Demand 113 2000)January 34,800 47 175,Peak Demand 175 2000 February;99,960;149)165;Peak %of Avg 155.1% 2000 March 77,400 104 165 2000;April 89,400 124 155) 2000)May'80,880)109 135 2000 June 79,200,110 140 2001 July,63600 85 4130 2001 August 78840 106 : 2001 September)86040 120 145) 2001 October'75390 101 160 2001 November ---12001 Summary 2001 December ---+;Avg Demand 103 2001 January "--Peak Demand 160 2001 February;++-|Peak %of Avg 155.2% 2001 March 74760 100 145 2001 April 74160 103 140 2001 May;74160 100 140) 2001 June -:: 2002 July 58800 79 - 2002 August +-- 2002 September :-- 2002 October!+:: 2002 November!::+2002 Summary 2002 December::--Avg Demand 102 2002 January:4100080 135)-Peak Demand 0 2002 February 75880 113 -,Peak %of Avg 0.0% 2002 March 79200 106 : 2002 April:73560 102 : 2002 May;72240 97:: 2002 June 63360 88 + B-1 APPENDIX C SITE CONTROL DOCUMENTS CITY OF PORT HEIDEN (907)837-2209 FAX (907)837-2248 FACSIMILE TRANSMITTAL SHEET ro:PROM: KARL HULSE,PE.BETTYANN WELBOURNE COMPANY:DATE: CRW ENGINEERING JULY 22 PAX NUMBER:TOTAL NO.OF PAGES INCLUDING COVER: 907-561-2273 6 PHONE NUMBER:SENDER'S REFERENCE NUMMER: 907-A6-5621 RE:YOUR REFERENCE NUMBER: PTH POWER PLANT UPGRADE Clurcent xProrreview ([p.easecomMenr CU PLEASE REPLY CJ]PLEASE RECYCLE NOTES/COMMENTS- MR.HULSE: PLEASE FIND THE ACCOMPANYING PAGES.I HOPE THIS 1S THE INFORMATION YOU ARE REQUESTING. IF YOU HAVE ANY QUESTIONS I AM IN THE OFFICE MONDAY-FRIDAY FROM 8:00-1:00. THANK YOU BETTYANN WELBOURNE CITY CLERK RECEIVED JUL 2 2-2003 CRW Engineering Group,LLC File in Folder.CC to seer COMES.A P.O,BOX 49050 PORT HEIDEN,AK 99549 96/T@ 9 FdVd-NSdTSH 1LYO0d 30 ALIS 8P722-LEB-2B6 GE:ZT €802/22/L6 CORRECTIVE AND SUPPLEMENTAL STATUTORY OULTCUAIM DEED[AS 34.15.140] WHEREAS,ALASKA PENINSULA CORPORATION,an Alaska Corporation (hereinafter "Corporation"or "Grantee"),and the CITY OF PORT HEIDEN (hereinafter "City"or "Grantor"),a municipal corporation, entered into an Agreement to Convey Real Property and Grant of Right of Entry (hereinafter "Agreement"),on January 28,1985, which Agreement was recorded on the 29th day of January,1986 in Book 0017,Pages 775-793;and WHEREAS,said Agreement contemplated a quitclaim deed he granted by the Corporation and within 30 days and following survey, such corrective deed as may be necessary;and |WHEREAS,the Corporation did convey by statutory quitclaim deed dated February 15,1985 and recorded on January 29,1986,in Book 0017,Pages 784-789,all ites rights,title and interest which -it had,if any,in and to the surface estate of the tracts of land More particularly described therein;and WHEREAS,said quitclaim deed contained an error in the description of parcels conveyed,to-wit:"Sections 15,21,22,25, 26,34,35 and 36 of T39S,RS59W,Seward Meridian";and WHEREAS,the Bureau of Land Management filed a surveyed plat pursuant to §14(c)(3)of ANCSA,43 U.S.C."§1613(c)(3)which correctly identifies the Parcels 1 thru 9,which 'plat is recorded as Plat #92-02,on February 24,1992 in the Kvichak Recording District,Third Judicial District,State of Alaska. PAGE 1 CORRECTIVE AND SUPPLEMENTAL QUITCLAIM DEEDTURelem\APC\6-94\00D 0602596 secv C98/28 9 3ONd N3dI3H 140d 40 ALIS 8b22-2E8-266 GEST €802/22/18 WHEREAS,only parcels 1 thru 8 are to be conveyed to the City of Port Heiden.Title to Section 5,T38S,RSaW,Seward Meridian has not been received from the BLM.Parcel 9 is a 14(c)(1) subsistence hunting cabin site to be conveyed to the Village Council after Alaska Peninsula Corporation receives title from the BLM. NOW,THEREFORE,THE CITY OF PORT HEIDEN,whose address is Port Heiden,Alaska 99549,for and in consideration of TEN DOLLARS ($10.00)in hand paid and other good and valuable consideration, hereby quitclaims and conveys all of its right,title and interest which it has,if any,in and to the surface estate of Sections 15, 21,22,25,26,34,35S and 36 of T39S,RS9W,Seward Meridian, Kvichak Recording District,Third Judicial District,State of Alaska,unto ALASKA PENINSULA CORPORATION,Grantee,and its assigns without warranty. IN WITNESS WHEREOF,the authorized officers have hereunto set CITY OF PORT HEIDEN By:2h,uke,Ita:Mayor /a By -_ PAGE 2 CORRECTIVE AND SUPPLEMENTAL QUITCLAIM DEEDTLit:chan\APC\6 -94\QCD 060254 :mcv . 98/EB FOVd N3QISH 1LYOd JO ALIS BP22-LES-266 GE:ZT €882/22/28 CERTIFICATEOFSATISFACTION WHEREAS,Alaska Peninsula Corporation,successor in interesttoMeshik,Inc.,is required to transfer title to certain lands as specified in §14(c)(3)of the Alaska Native Claims Settlement Act{(ANCSA),as amended,to the Second Class City of Port Heiden, Alaska;and WHEREAS,the Corporation has conveyed the surface estate ofthelandwithinthoseportionsoftheparcelsdescribedas: Lots 1 thru 8,Plat No.92-02,recorded on Pebruary 24,1992 in the Kvichak RecordingDistrict,Third Judicial District,State of Alaska,containing 1,280 acres. WHEREAS,it has been determined that the land transfer satisfies the requirements of §14(c)(3)of ANCSA as amended; NOW,THEREFORE,it is hereby certified that the Alaska Peninsula Corporation has completely discharged its obligation to the City of Port Heiden,Alaska,under the provisions of §14 (c)(3)of ANCSA,as amended. CITY OF PORT HEIDEN By:wh Pant fp,Its:Mayor/ STATE OF ALASKA atCteeQaTHIRD JUDICIAL DISTRICT THIS IS TO CERTIFY that on the ai day of Atesst ,1974,before me,the undersiqned Notary c for the State of Alaska, or U.S.Postmaster,duly commissioned and aworn as such,personallycame"Cesey reales Te,,to me known to be andsaidofficers,respectively,of said City,and acknowledged thatsaidinstrumentassignedandsealedonbehalfofsaidCitybythe authority of its a ais ,and OF THECITYOFPORTHEIDEN,EKO acknowledged said instrument to be thefreeactanddeedoftheCityofPortHeiden. IN WITNESS WHEREOF,I have hereunto set my hand and affixed mysealthedayandyearfirstabovewritten. Notary aoe for AlaskaMyCommissionExpires: LH :chem\APC\§-94\CERT2 1060994 smc 98/>8 3d NAdISH LYO0d 30 ALIS 8p22-LES-206 SE:ST £602/22/28 ACCEPTANCE This grant is hereby accepted by the Second Class City of PortHeiden,Alaska. GRANTEE CITY OF PORT HEIDEN By:. Mayor of Port Heidoy ACKNOWLEDGEMENT STATE OF ALASKA SS: THIRD JUDICIAL DISTRICT ) THIS IS TO CERTIFY that on the A day of eget ,1977,before me,the undersigned Notary lic for the State of Alaska,duly commissioned and sworn as such,personally came Heary,Mayor of the City of Port Heiden,Alaska,andacknowledgedthatsaidinstrumentwassignedandsealedonbehalfoftheCityofPortHeidenbyproperauthoritydelegatedandvestedinhimself,and acknowledged further said instrument to be the free act and deed of said City of Port Heiden. IN WITNESS WHEREOF,I have hereunto set my hand and affixed my seal -the day and year first above written. Notary ae for AlaskaMyCommissionExpires: PAGE 1 ACCEPTANCESLA:Chm \APC\S 94\ACCEPT2 1060994:mev 9@/S@ 3DVd NSqTSH LY0d 30 ALIS BP22-ZE8-286 SE:ZT €882/22/28 ACKNOWLEDGEMENT STATE OF ALASKA ) )ss: THIRD JUDICIAL DISTRICT ) THIS IS TO CERTIFY that on the a4 day of Aecgpcsat1994,before me,the undersigned Notary Public for e State oAlaska,or U.S.Postmaster,duly commissioned and sworn as such,personally came Henry MM dtsen 1 ,to meknowntobeandsaidofficers,respectively,of said City,andacknowledgedthatsaidinstrumentwassignedandsealedonbehalf of said City by the authority of its Maat andoftheCITYOFPORTHEIDEN,"acknowledged said instrument to be the free act and deed of Port Heiden. IN WITNESS WHEREOF,I have hereunto set my hand and affixed mysealthedayandyearfirstabovewritten. Commission Expires: PAGE 3 CORRECTIVE AND SUPPLEMENTAL QUITCLAIM DEED s7LE :chon\APC\6 -94\0CD:0602964 :mcv 98/90 FOVd NSdISH LY0d 40 ALIS 8bcc-LE8-246 GE:ZT €802/22/28 APPENDIX D WIND DATA REPORT AND ECONOMIC ANALYSIS ALAS KA 813 W.Northern Lights Blvd.a Anchorage,AK 99503 Phone:907-269-3000 ENERGY AUTHORITY Fax:907-269-3044 www.aidea.org/wind.htm Wind Resource Assessment for PORT HEIDEN,ALASKA Site #2548 Date last modified:11/04/2005 Prepared by:Mia Devine a Ce,ad ANAG Port Heiden Latitude:56°55'52”N Elevation:68 ft (NAD27)56°55.867'Tower Type:100-foot guyed lattice tower Longitude:158°37'11.6"W Monitor Start:8/06/2004 (NAD27)158°37.193'Monitor End:In operation INTRODUCTION On September 23,2003,one anemometer and one wind vane were mounted on a 10-kW Bergey wind turbine tower at a height of 85 feet.The 100-foot tower is a 3-legged guyed lattice tower located next to the city building. A temperature sensor was mounted at a height of 14 feet.This system recorded data intermittently until the logger failed.On August 6,2004,a new NRG Symphonie data logger was installed.On October 7,2004,an additional anemometer and wind vane were installed at a height of 85 feet and at a 90 degree offset from the first set of equipment to reduce the effects of the tower on readings from certain directions.For consistency in the data sample,this report focuses on data collected by the Symphonie logger,beginning August 6,2004. The purpose of this monitoring effort,jointly funded by the Bristol Bay Native Corporation,the Sustainable Energy Council of the Alaska Peninsula (SECAP),and AEA,is to evaluate the feasibility of utilizing utility-scale wind energy in the community.This report summarizes the wind resource data collected and the long-term energy production potential of the site. SITE DESCRIPTION Port Heiden is located about 400 miles southwest of Anchorage on the north side of the Alaska Peninsula.It lies at the mouth of the Meshik River near the Aniakchak National Preserve and Monument.The climate is maritime with cool summers and relatively warm winters.Figure 1 shows the location of the wind monitoring tower relative to the surrounding terrain. Page 1 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment i'COMIOUR INTERVAL BO FEET DATING Mate SOA RLaeeproahetanipenseeelkmutthcAmrekenebeandHa,am SoeOFFAL OF He*rye FOR GALE BY US OLOLOCICAL SURVEY FAGANES.ALASKA PO7G1,DENVER COLORADD $0225,08 RESTON.LUM HeA 22002AFOLDERDESCINURETOPOGRAINGMAIRAitSEAN@AVAILAGEEOnMLQUEST Bes ay'he Ss BindDD:0 Na Se Page 2 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment Table 1 lists the types of sensors that were mounted on the tower,the channel of the data logger that each sensorwaswiredinto,and where each sensor was mounted on the tower. Table 1.Summary of Sensors Installed on the Met Tower Ch#Sensor Type Height Offset Boom Orientation |'avout of Equipment on Tower 1 #40 Anemometer 85 ft NRG Standard 180°True ocHi 2 #40 Anemometer 85 ft |NRG Standard 280°True aie7#200P Wind Vane 85 ft 180°True 180°True CH78|#200P WindVane |80ft 90°True 270°True BCHE 9 #110S Temperature 4m NRG Standard - In order to install the sensors,the wind tower was tilted down,as shown in the photos below. Figure 2.Installation of Sensors on Wind Tower in Port Heiden Page 3 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment DATA PROCESSING PROCEDURES AND DEFINITIONS The following information summarizes the data processing procedures that were performed on the raw measureddatainordertocreateanannualdatasetof"typical”wind speeds,which could then be used to calculate potentialpowerproductionfromwindturbines.There are various methods and reasons for adjusting the raw data,so thepurposeofthesenotesistodocumentwhatwasdoneinthissituation.The raw data set is available on the Alaska Energy Authority website (www.akenergyauthority.org)so one could perform their own data processing procedures. Units -Since most wind turbine manufacturer data is provided in metric units,those units are used here. 1 meter/second =2.24 mph =1.95 knots 1 meter =3.28 feet 1°C =5/9 ("F -32) Max/Min Test -All of the 10-minute data values were evaluated to ensure that none of them fell outside of the normal range for which the equipment is rated. Tower Shadow -The tower itself can affect readings from the anemometer at times when the anemometer is located downwind of the tower.To minimize this effect,one data set is compiled from the 2 anemometers depending on the direction of the wind at any given time. Icing -Anomalies in the data can suggest when the sensors were not recording accurately due to icing events. Since wind vanes tend to freeze before the anemometers,icing events are typically identified whenever the 10- minute standard deviation of the wind vane is zero (the wind vane is not moving)and the temperature is at or below freezing.Some additional time before and after the icing event are filtered out to account for the slow build up and shedding of ice. Filling Gaps -Whenever measured met tower data is available,it is used.Two different methods are used to fill in the remaining portion of the year.First,nearby airport data is used if available.A linear correlation equation is defined between the airport and met tower site,which is used to adjust the hourly airport data recorded at the time of the gap.If neither met tower nor airport data is available for a given timestep,the software program Windographer (www.mistaya.ca)is used.Windographer uses statistical methods based on patterns in the data surrounding the gap,and is good for filling short gaps in data. Long-term Estimates -The year of data collected at the met tower site can be adjusted to account for inter-annual fluctuations in the wind resource.To do this,a nearby weather station with a consistent historical record of wind data and with a strong correlation to the met tower location is needed. Turbulence Intensity -Turbulence intensity is the most basic measure of the turbulence of the wind.Turbulence intensity is calculated at each 10-minute timestep by dividing the standard deviation of the wind speed during that timestep by the average wind speed over that timestep.It is calculated only when the mean wind speed is at least 4mis.Typically,a turbulence intensity of 0.10 or less is desired for minimal wear on wind turbine components. Wind Shear -Typically,wind speeds increase with height above ground level.This vertical variation in wind speed is called wind shear and is influenced by surface roughness,surrounding terrain,and atmospheric stability.If the met tower is equipped with anemometers at different heights the wind shear exponent,a,can be calculated according to the power law formula: a v .(#4)=ey where H,and H;are the measurement heights and v,and v2 are the measured wind speeds. Wind shear is calculated only with wind speed data above 4 m/s.Values can range from 0.05 to 0.25.Since wind speeds were not measured at different heights at this location,a typical value of 0.14 is assumed. Scaling to Hub Height -If the wind turbine hub height is different from the height at which the wind resource is measured,the wind resource can be adjusted using the power law formula described above and using the wind shear data calculated at the site. , Air Density Adjustment -The power that can be extracted from the wind is directly related to the density of the air.Air density,p,is a function of temperature and pressure and is calculated for each 10-minute timestepaccordingtothefollowingequation(units for air density are kg/m'): Page 4 of 15 _Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment p=,where P is pressure (kPa),R is the gas constant for air (287.1 J/kgK),and T is temperature in Kelvin.Xx Since air pressure is not measured at the met tower site,the site elevation is used to calculate an annual averageairpressurevalueaccordingtothefollowingequation: P =1.225 -(1.194 x 10%)x elevation Since wind turbine power curves are based on a standard air density of 1.225 kg/m3,the wind speeds measured at the met tower site are adjusted to create standard wind speed values that can be compared to the standard power curves.The adjustment is made according to the following formula: P.d 3_measure!V tan dard V neasured x P standard Wind Power Density -Wind power density provides a more accurate representation of a site's wind energy potential than the annual average wind speed because it includes how wind speeds are distributed around the average as well as the local air density.The units of wind power density are watts per square meter and represent the power produced per square meter of area that the blades sweep as they rotate around the rotor. Wind Power Class -A seven level classification system based on wind power density is used to simplify the comparison of potential wind sites.Areas of Class 4 and higher are considered suitable for utility-scale wind power development. Weibull Distribution -The Weibull distribution is commonly used to approximate the wind speed frequency distribution in many areas when measured data is not available.In this case,the Weibull distribution is used to compare with our measured data.The Weibull is defined as follows: rot (a Where P(v)is the probability of wind speed v occurring,c is the scale factor which is related to the average wind speed,and k is the shape factor which describes the distribution of the wind speeds.Typical k values range from 1.5 to 3.0,with lower k values resulting in higher average wind power densities. Page 5 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment LONG-TERM REFERENCE STATION Wind data from the Port Heiden Airport weather station,located about 2 miles north of the met tower site,serves as a long-term reference for the wind resource in the area.This data is measured at a height of 7 meters above ground level and at an elevation of 29 meters.Since the airport is close to the met tower site and the surroundingterrainisrelativelyflat,the patterns in wind resource data between the sites are expected to be similar. Nearly 30 years of wind speeds are shown in Table 2 and Figure 3.The average wind speed over the 30-year period is 5.7 m/s at a height of 7 meters above ground level.The annual wind speed rarely deviates more than 8% above or below this average. Table 2.Average Wind Speeds at 7-m Height at Port Heiden Airport (m/s) %of 30-yr Year|JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC]AVG]Average 1976]54 586 583 47 544 445 434 394 466 55 522 5.55]5.1 89% 1977 |7.11 649 661 574 444 478 543 52 555 633 636 614]58 102% 1978]5.46 652 562 558 465 506 517 557 599 5.9 78 89 |5.7 99% 1979]7.55 5.79 592 613 593 491 395 543 566 606 7.14 7.33 {|6.0 105% 1980|666 541 692 528 605 664 518 476 547 481 464 661;57 100% 1981]536 693 542 414 539 419 508 652 521 652 661 668}56 98% 1982|6.09 626 65 607 539 58 68 507 589 588 523 541]59 102% 1983 |538 485 49 51 554 42 451 456 583 609 552 692}53 92% 1984]5.98 629 438 544 455 441 426 441 534 528 654 622]53 93% 1985]7.43 635 663 553 6.17 4.67 446 588 565 766 745 684]62 108% 1986 |5.41 643 4.78 556 603 641 444 542 595 457 619 633]56 98% 1987]6.46 623 588 591 536 551 458 533 558 613 526 611}5.7 100% 1988 |5.89 7 5.78 56 485 482 462 512 5.78 559 561 7.24]5.7 99% 1989|7.86 9.07 535 597 59 495 462 533 633 7.95 577 638}6.2 108% 1990]739 7.04 47 462 653 541 5.24 555 636 548 636 6.96]6.1 106% 1991]488 742 643 499 7.06 644 485 525 627 543 483 668;58 101% 1992]521 488 599 456 3.73 5.78 467 612 499 559 53 7.02]53 93% 1993!66 7.77 606 525 584 4.79 492 606 603 451 619 615]58 102% 1994]53 551 688 496 4.73 488 437 482 579 576 815 7.04]56 98% 1995]53 67 557 483 5.79 438 597 503 562 639 447 6.08]56 97% 1996 |5.03 857 614 608 5.1 66 437 468 682 499 7.04 625]59 104% 1997}6.16 466 492 448 501 465 3.73 532 605 4.71 549 588)5.0 87% 1998]496 3.72 765 7.11 649 538 458 657 614 609 564 78 |6.0 105% 1999]63 689 571 649 523 494 487 517 53 496 5.77 662]57 99% 2000]6.34 9.01 7.01 524 514 606 493 56 582 566 669 858)62 108% 2001]6.13 7.12 605 614 599 505 564 5.1 56 644 635 634]6.0 105% 2002}69 7.0 65 63 58 44 53 46 66 66 56 £64 |6.0 105% 2003]63 56 60 57 56 55 46 49 47 57 72 65 |57 99%2004 |5.5 5.7 6.1 5.9 5.2 5.2 45 5.1 5.8 6.7 6.7 7.0 5.8 101% AVG |6.12 642 594 542 545 516 481 524 569 581 601 662|57 100% Page 6 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment AverageWindSpeed(m/s)Oo-pFrANYWwWhkonnNDOOOCna a OR DMROKNAMOMAMORAMOKNAMATHOROMWOEAYT PrERR DODD DOD DANDDDAAHAAMAHAH#ANRMBRHDDIDASAMOOADMAAAAA9AAABHBAAAHAAAHAAAARHRHHOADS=}rrr errr Se SC er wr rer er TFT Kr Kr Kr Kr KF KF TK KT KT NNN NN Figure 3.Annual Average Wind Speeds at 7-m Height at Port Heiden Airport Weather Station Hourly wind speed measurements from the Port Heiden Airport weather station that are concurrent with recordings from the wind monitoring tower site were purchased from the National Climatic Data Center.Data between these sites was compared and a correlation coefficient of 0.90 was calculated (a value of 1 is perfect).This suggests that,although the actual wind speed values at the two sites are different,the pattern of wind speed fluctuations is similar between the sites.Based on this correlation a long-term estimate of the wind speed at the wind tower site was developed. Page 7 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment WIND DATA RESULTS FOR WIND TOWER SITE Table 3 summarizes the amount of data that was successfully retrieved from the anemometers at the wind towersite. Table 3.Data Recovery Rates for Met Tower Data Month Data Recovery January 48% February 91% March 100% April 100% May 100% June 100% July 89% August 47% September 95% October 99% November 98% December 100% Annual Avg 89% Table 4 and Table 5 summarize the wind resource data measured at the wind tower site as well as the estimated long-term data for this site. Table 4.Measured Wind Speeds at 26-m Height at Wind Tower Location,Aug 2004 -July 2005 (m/s) Jan Feb Mar Apr May Jun _-_-Jul =Aug Sep Oct Nov___Dec |Annual 7.1 #79 #87 61 #64 51 #46 63 71 #74 85 81 7.0 78 81 84 60 59 53 48 64 68 77 84 84 7.0 79 82 79 60 63 51 #48 62 68 84 91 83 7.1 78 79 81 #57 59 54 46 57 68 83 93 8.1 7.0 79 #85 84 53 59 51 #42 #59 66 80 93 £80 6.9 77 88 84 53 63 53 #43 #61 #69 82 93 £82 7.1 69 89 82 53 64 52 45 53 71 82 96 83 7.0 70 87 80 52 63 #50 41 #52 69 82 95 88 6.9 69 84 83 52 63 54 43 59 67 82 91 90 7.0 74 #81 84 57 #68 61 46 66 67 82 90 92 7.2 86 84 87 63 73 67 48 62 72 86 81 95 7.5 86 85 93 65 78 7.1 §2 64 72 91 82 97 7.8 83 86 93 66 80 76 58 66 71 93 85 92 7.9 75 84 92 74 83 79 61 #65 74 96 82 90 7.9 69 85 92 77 85 83 60 72 74 96 85 93 8.1 68 81 95 78 86 81 64 74 74 88 81 9.1 8.0 69 85 90 79 85 77 63 72 75 83 80 86 7.9 68 86 88 78 83 72 60 71 #76 79 79 83 7.7 65 88 83 75 77 68 61 7.1 #73 #7414 #82 9.0 7.5 65 91 79 70 76 66 58 72 71 #72 83 £91 7.5 55 88 78 67 71 #63 #52 69 70 74 83 88 7.1 64 83 77 64 65 56 50 62 73 77 87 89 7.1 69 84 82 62 62 52 46 60 70 79 9.1 8.6 7.0 68 82 85 63 62 54 46 62 71 76 91 8.4 7.0 72 84 85 64 70 62 #51 #64 j%(71 #282 87 87 7.3=xrROPOORA-oSaaOmSeomomooOBYISGBDVGBHRRBNAGOPNANMHRWN=O}82ie)Page 8 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment Table 5.Estimated Long-term Wind Speeds at 26-m Height at Wind Tower Location (m/s)sJan Feb Mar Apr-May Jun_-_-siJul_=Aug”=Sep =Oct.-Nov___Dec |Annual 77)066.706-CU 7.100 600 C6 UF OCG CC 4A CBT OB 7.6 6.4 75 68 70 62 56 54 50 55 56 65 80 7.5 6.4 72 62 69 57 56 52 48 52 55 66 84 75 6.2 7.1 7.1 72 58 58 50 48 =5.1 50 66 85 739 6.3 68 69 68 56 57 50 46 49 55 66 85 76 6.2 68 68 70 57 54 5.1 45 49 55 68 83 7.6 6.2 68 66 70 54 57 50 45 49 57 70 84 76 6.2 71 64 70 52 56 55 47 47 #57 #69 83 7.7 6.2 65 6.1 69 60 60 £61 §2 54 56 74 79 82 6.4 68 70 72 62 68 63 53 59 59 78 8.1 8.4 6.8 10 64 64 75 70 73 69 57 62 69 8.1 80 89 7.1 11 7.10 (7.1 80 75 76 74 59 64 74 84 84 86 7.5 12 77 067606888 OUBS)6hClUBSlLCUT7HUCLCUCBCE CUB CBE CBT OBE 7.9 13 83 82 86 90 87 79 67 67 79 88 89 87 8.2 14 79 87 9.4 93 89 82 69 69 78 90 87 86 8.3 15 85 87 94 9.1 9.1 83 7.0 7.4 82 89 89 88 8.5 16 79°#77 =91 90 87 841 70 76 80 83 87 82 8.2 17 75 76 86 91 86 79 67 73 78 80 86 7.9 8.0 18 75 69 82 89 83 78 66 72 75 72 83 £83 7.7 19 75 69 78 8.1 8.1 72 63 69 66 7.1 80 84 7.4 20 73°68 70 =7.1 69 64 59 63 60 64 8.1 8.1 6.9 21 73°#71 #73 66 65 58 55 59 57 67 84 8.1 6.7 22 75 67 70 65 59 55 49 56 56 67 84 84 6.5 23 75 67 69 63 55 56 50 56 55 69 78 £729 6.4 Avg |73 71 #76 #71 #69 #64 #56 60 64 74 83 8.7.0=xOBNOAAWN=Of8Aug 04 -July 05 |Long-term Estimate 9 20 Month mis mph mis mph 8{fat,7777 +18 Jan 6.9 15.5 6.0 13.3 BT fo Perens Gece gennnennnm gn Pomp 46 EE |Feb 8.1 18.1 5.8 12.9 Esl ets ®143 EF |Mar [82 _]182 [62 13.9 B54 <-dary |Ae 6.1 13.7 5.7 12.9 24!:tg 3 |May |67 15.1 5.6 12.6 ”77)Jun 6.0 13.4 5.3 11.8z3Tos]su 49 10.9 |46 10.3 =24 T4 3]aw [61 |138 |49 11.0 14 +2 Sep |68 15.2 5.2 11.7 0 ATT 0 Oct 7.9 17.6 6.0 13.5 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Nov 8.3 18.6 6.7 15.1 ;Dec 8.4 18.7 6.6 14.7=='Aug 04 -July 05 Long-term Estimate |Avg 70 157 57 128 Figure 4.Monthly Average Wind Speeds at Wind Tower Site (26m Height) As shown,the highest wind month is typically November and the lowest wind month is typically July.As shown below,the diurnal variation is more pronounced during the summer months than the winter months,with winds typically lowest in the morning and increasing in the afternoon. Page 9 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment yg _8 £7E63° a 47 3 3=21 14 0 T T T T LI T T T TT TT T T T T T T T TTT 0 r r r .tt tt -r r r r T -- 0 2 4 6 8 10 12 14 16 18 20 22 0 2 4 6 8 10 12 14 16 18 20 ©22 .HourofDayHourofDay---.Longterm Estimate -July Longterm Estimate -January==+8/04 to 7/05 Longterm Estimate Figure 5.Hourly Average Wind Speeds at Wind Tower Site (26m Height) A common method of displaying a year of wind data is a wind frequency distribution,which shows the percent oftheyearthateachwindspeedoccurs.Figure 6 shows the measured wind frequency distribution as well as thebestmatchedWeibulldistribution(c =8.3,k=1.8). 12 Measured Measured Bin m/s Hours Bin m/s Hours »10 0 209 15 136EsALIS139216102 E :nie IN 2 589 17 69 ° :3 752 18 47 =:4 881 19 39 8 4,5 872 20 32 o 6 846 21 22ao2477772212 :ale 8 690 23 60Ttt-t re et |5 ne es De A ee 9 559 24 5 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 ft an 25 ;:414 26WindSpeed(mis)12 370 27 1[=Measured Weibull |13 276 28 0 14 177 29 0 'Total 8,760 Figure 6.Wind Speed Frequency Distribution of Wind Tower Data The cut-in wind speed of many wind turbines is 4 m/s and the cut-out wind speed is around 25 m/s.The frequency distribution shows that a large percentage of the wind in Port Heiden falls within this operational zone. Table 6 shows the annual wind rose at the wind tower site versus the wind rose at the Port Heiden airport.The predominant wind energy direction at both the wind tower and the airport is SE,with summer winds coming from the SW. Table 6.Annual Wind Rose for Wind Tower Site and Airport Site Met Tower Site Wind Rose,Aug 04 -July 05 Annual Wind Rose from Airport,1973-2002 N N Legend Ci Percent of Total Wind Energy Percent of Total Time NRG Systems SDR Version 5.03me Di JanuarysDuly Page10 of 15 PORT HEIDEN,AK Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment Table 8 summarizes the monthly turbulence intensity at the wind tower site.The turbulence intensity of 0.10 to0.16 is considered moderate and unlikely to contribute to excessive wear of wind turbines. Table 8.Monthly Turbulence Intensity at Wind Tower Site Month Turbulence Intensity Jan 0.11 Feb 0.10 Mar 0.12 Apr 0.12 May |0.12 Jun 0.12 Jul 0.12 Aug 0.12 Sep 0.11 Oct 0.11 Nov 0.10 Dec 0.11 Annual Avg 0.11 Figure 7.Turbulence Intensity by Direction,Aug 2004 -July 2005 The air temperature can affect wind power production in two primary ways:1)colder temperatures lead to higher air densities and therefore more power production,and 2)some wind turbines shut down in very cold situations (usually below -25°C).Since the temperature sensor at the wind tower was not functioning properly,the following information comes from data recorded at the Port Heiden airport weather station.Between January 2001 and August 2005,the temperature dropped below -25°C for about 1 hour and was below -20°C for about 13 hours. 20 15 5 Temperature(degC)5 15.8 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Figure 8.Monthly Average Temperatures in Port Heiden Page 12 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment POTENTIAL POWER PRODUCTION FROM WIND TURBINES Table 9 lists a number of parameters used to characterize the power production potential of a particular site. Table 9.Summary of Power Production Potential of Met Tower Site Average Wind Power Density (30m)490 Wim? Wind Power Class 5-6 Rating Excellent Various wind turbines,listed in Table 12,were used to calculate the energy production at the met tower site based on the long-term wind resource data set.Although different wind turbines are offered with different tower heights, to be consistent it is assumed that any wind turbine rated at 100 kW or less would be mounted on a 30-meter tall tower,while anything larger would be mounted on a 50-meter tower.The wind resource was adjusted to these heights based on the standard wind shear of 0.14.The wind resource was also adjusted for local air density. Table 10 summarizes the estimated energy production from various wind turbines at the met tower site. Table 10.Gross Annual Energy Production from Different Wind Turbines at Met Tower Site (kWh) Month exw reve Peraey 101 FL30 |Entegrity |FL100 |Nwioo |FL250 |vo7 v47 Jan 847 |2,147 |2,339 |10645|17.819 |34,609 |28515 |79,642 |72,500 |240127 Feb 603.|1,763 |1,910 |8,762 |14596 |28,484 |23,343 |65,447 |59.454 |197,511Mar836|2,152 |2,417 |10,828]17,544 |34512 |28,354 |79,193 |72,654 |246,969 Apr 644 |1,657 |1,745 |8,225 |13,038 |25,590 |20,840 |59,714 |54,583 |187,440May682|1,774 |1,935 |8919 |13,804 |27,378 |22,366 |64,177 |58,658 |203,360 Jun 572 |1,487 |1,597 |7,320 |11,263 |22,506 |18,416 |53,020 |48,383 |165,982 Jul 456 |1,222 |1,272 |6,202 |8,752 |17,492 |14,174 |42.975 |39,125 |142,568 Aug 556 |1,461 |1,542 |7,264]11,063 |21,878 |17,898 |51,833 |47,546 |166,276 Sep ses |1,486 |1,600 |7,442 |11,084 |22,192 |18,072 |52,914 |48,340 |170,126Oct733|1,886 |1,985 |9.423 |14,946 |29,289 |23,825 |68,265 |62,539 |214,067 Nov 81 |2.248 |2,367 |11,277]18,612 |35,918 |29,362 |84,447 |76,267 |257,599 Dec 912 |2323 |2534 |11,605|19,303 |37,705 |30,887 |86,460 |78,743 |261,782Annual|8378 |21,607 |23.243 |107,911]171,825 |337,751 |276,053 |788,086 |718,792 |2,453,808 avin |853 |878 573.|782 956 950 o49 |1,108 |1,204 |1,339 Table 10 also lists the annual energy production per square meter of swept area (kWhim?).This allows one to directly compare the efficiency of one wind turbine against another,as shown in Figure 1. 180 -Proven 2.5kW --Proven 6kW Bergey 10 kW -FL30 -Entegrity -FL100 vee NW 100 FL250 -NV27 -vV47PowerProduction(kWh/m42)20 7 0 CE a : Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec .Figure 9.Comparison of Power Production per Square Meter of Swept Area from Various Wind Turbines Page 13 of 15 Alaska Energy Authority PORT HEIDEN,AK Wind Resource Assessment Table 11 summarizes the gross capacity factor of the wind turbines per month.Gross capacity factor is the amountofenergyproducedbasedonthegivenwindresourcedividedbythemaximumamountofenergythatcouldbeproducedifthewindturbineweretooperateatratedpowerduringthatentireperiod.The gross capacity factorcouldbefurtherreducedbyupto10%to account for transformer/line losses,turbine downtime,soiling of theblades,icing of the blades,yaw losses,and extreme weather conditions. Table 11.Gross Capacity Factor of Different Wind Turbines at Met Tower Site Month ervey ae Berary 101 F130 |Entegrty|FL100 |Nw100 |FL250}v27 |va7 Jan 46%48%31%|48%|36%47%38%|43%|43%|49% Feb 41%44%28%|43%|33%42%35%|30%|39%|45% Mar 45%48%32%|49%|36%46%38%|43%|43%|50%Apr 36%38%24%|38%|27%36%29%|33%|34%|30% May 37%40%26%|40%|28%37%30%|35%|35%|41% Jun 32%34%22%|34%|24%31%26%|20%|30%|35% Jul 25%27%17%|28%|18%24%19%|23%|23%|20% Aug 30%33%21%|33%|23%29%24%|28%|28%|34% Sep 31%34%22%|34%|23%31%25%|29%|30%|36%Oct 39%42%27%|42%|30%39%32%|37%|37%|44% Nov 49%52%33%|52%|39%50%41%|47%|47%|54% Dec 49%52%34%|52%|30%51%42%|46%|47%|53%Annual |38%41%27%|41%|30%39%32%|36%|36%|42% CONCLUSION This report provides a summary of wind resource data collected from August 2004 through July 2005 in Port Heiden,Alaska.The data was compared to long-term trends in the area.Based on correlations with the long-term weather station at the Port Heiden airport,estimates were made to create a long-term dataset for the Port Heiden wind tower site.This information was used to make predictions as to the potential energy production from wind turbines at that site. It is estimated that the long-term annual average wind speed at the wind tower site is 7.0 m/s at a height of 26 meters above ground level.Taking the local air density into account,the average wind power density for the site is490wim'.This information means that Port Heiden has a Class 5 to 6 wind resource,which is excellent for wind power development. Page 14 of 15 Alaska Energy Authority PORT HEIDEN,AK Table 12.Wind Turbine Models Used in Power Production Analysis Wind Resource Assessment Power Curve Proven =y25KWE20f-Tower Height:30 metersroa,Z Swept Area:9.6 m?http:/Avww.provenenergy.com e WA Turbine Weight:190 kg ©_Wind Speed (mis) Power Curve 6 kW.z Tower Height:30 meters .rz f-Swept Area:23.8 m?http:/Awww.provenenergy.com e Turbine Weight:500 kg°ed speed {mis}20 Bergey oe Power Curve40kW=:7 \goer petgnt pomsmeters4weptArea:m?'bergey.com i f-=Weight:not available (1)6 10 16 20 Wind Speed (més) Power Curve Fuhriander FL30 =”aia Tower Height:30 meters30kWre4SweptArea:133 m?www.lorax-energy.com bo -F Weight (nacelle &rotor): 0 "6 10 18 20 25 410 kgWindSpeed(m/s) Power Curve Entegrity oo rai Tower Height:30 meters66kW3”Swept Area:177 m?www.entegritywind.com pat-tF Weight (drivetrain &rotor): 0 8 1 18 28 2,420 kgWindSpeed(ens) Power Curve Po)y Tower Height:30 metersPrltetaalFL100780SweptArea:348 m? é f-Weight (nacelle &rotor):www.lorax-energy.com ge"gy 5 5 0 156 2 25 2,380 kgWindSpeed(m/s) 120 Power Curve :Tower Height:30 meterspiedPowerNW100/19 7 °K Swept Area:284 m? é f-Weight (nacelle &rotor):a Awww.northernpower.com so 5 ae 7,086 kg are,Power Curve Fuhrlander FL250 F aco Tower Height:50 meters250kWEcoSweptArea:684 m? www .lorax-energy.com <if Weight (nacelle &rotor):Sa *%|4,050 kg Power Curve Vestas V27 gr in Tower Height:50 meters225kW¥100 7 Swept Area:573 m? (refurbished,various suppliers)*CF Weight:not available(J Gand Speed (mitt 25 Power Curve go avestaenat7”Tower Height:50 meters 'proof Swept Area:1,735 m?Www.vestas.com 8 os 7,2 Weight:not availableindSpeed(m/s Page 15 of 15 TDX WIND REPORT PORT HEIDEN,ALASKA .4300BStreet Suite,402 Anchorage,AK 99503 "*\(907)278-2312 2 bsPsyWn \Piesope Anchorage,AK.Saint Paul,AK'Philadelphia,PA Port Heiden Wind Power Feasibility Study Executive Summary: This report supplements the Conceptual Design Review,prepared by the Alaska Energy Authority for a new diesel fueled power plant in Port Heiden,Alaska.Included in this report is a detailed model outlining various options for including wind power as a source of both electricity and heat in the new power plant.Low,medium and high penetration options are all addressed,with equipment options from two utility grade suppliers of wind turbines.In the high penetration model,excess electricity from the wind turbines would be used to create thermal energy and stored for immediate use for space heating or other beneficial application through a hot water storage and distribution system at the adjacent school. Recommendations: TDX Power recommends installation of a high penetration wind diesel hybrid plant in Port Heiden witha thermal recovery system integrated into the existing heating system at the school.While we acknowledge different perspectives on the economic analysis of such a project,it is clear to us this wind diesel configuration would produce the greatest potential future savings for the community,the greatest leverage against increasing fuel prices and other liabilities associated with diesel only generation,and flexibility for future electric and thermal load growth in the community. Some specific components of this recommendation include: e Three Northwind 100 wind turbines.While several aspects of the Fuhrlaender wind turbine appeal to us,including their industry experience in mass producing wind turbines in the competitive European market and their specific experience and track record producing and supporting both their 100 and 250 kw machines,the increased cost of this machine (primarily as a result of the Euro exchange rate)simply does not support its selection. e Completion of a detailed geotechnical analysis is required to confirm the technical feasibility and construction cost estimates for this project. e Negotiation of a firm support agreement from Northern Power,including clearly defined warranty and turbine support parameters and costs for the first three years. e Negotiation of an EPC contract with appropriate guarantees for project milestones, timelines and budget. Anchorage,AK Saint Paul,AK Philadelphia,PA Installation Cost,Operational Economics &Maintenance Considerations for a Wind Power System Addition to the New Port Heiden Diesel Power Plant Background The Alaska Energy Authority plans to supply a new diesel technology powerhouse to the village of Port Heiden for the purpose of improving the community's electric supply reliability and operating efficiency.The load following powerhouse will consist of a four-unit engine generator configuration with total nameplate capacity of 466 Kilowatts.Deploying engine generators rated at 192,150,86 and 38 Kilowatts,the AEA system is designed to match engine size to demand and provide significant redundancy for safety purposes.The AEA plant will comfortably meet the average annual community electric load of approximately 90 Kilowatts,accommodate off peak demand of approximately 70 Kilowatts and peak demand of approximately 180 Kilowatts through load sensing,automatic switchgear. Coincidental to the planning process for the new Port Heiden diesel generating facility,the Alaska Energy Authority is interested to evaluate the cost and operating economics of integrating a wind energy generation component into the diesel power plant.The AEA is aware that this type of wind/diesel hybrid integration now has considerable case history experience in Alaska and throughout the world.Properly located and designed,hybrid technology has successfully demonstrated the ability to significantly reduce fuel use and powerhouse maintenance through reduced engine run time.In order to evaluate the cost- benefit of wind integration in the Port Heiden diesel plant,AEA commissioned TDX Power to provide a detailed analysis of the expense and effect of adding wind generation to the planned Port Heiden generating facility. TDX Power is an Anchorage based engineering services and generation equipment provider and is the owner/operator of two regulated Alaska electric utilities,located in Sand Point and Prudhoe Bay.TDX also designed and constructed the largest high penetration,cogenerating wind/diesel system in Alaska,located on Saint Paul Island.The 500 Kilowatt Saint Paul hybrid plant has been awarded a variety of DOE innovation and advanced efficiency awards and has been successfully operational since 1999. nw This report consists of five sections:1)recommended hybrid system design,2)projectedinstalledcostofawindgenerationsystemanditsancillarycomponents,3)projected impact of the wind generation system on the diesel plant's operating economics,4)operations and maintenance program considerations and cost,and 5)final observations. Summary Wind/Diesel System Design The decision path for high,medium,or low penetration includes analysis of the wind resource,the forecasted electric load and analysis of potential uses for thermal energy.The attached economic model,which incorporates results from multiple turbine manufacturers and configurations suggests a high penetration design provides superior cost/benefit performance compared to low or medium penetration configurations and therefore focused its primary attention on it. Comparison of an integrated wind diesel system to a diesel only powerhouse configuration was also performed.A diesel only operation is performed by setting the Wind Turbine Availability (note 15)to 0%and Diesel Jacket Water (note 14)also to 0%,(see Tab "Diesel Only")on "Analysis -Port Heiden Summary"file.Upon review of "Diesel Only"tab,the power required for the community is provided from the John Deere 6081H and 6068H Diesels.No jacket water is recovered,due to distance,some electric energy is used to keep the thermal tank at temperature during the school building heating seasons. Based on this model,TDX Power recommends a high penetration wind diesel plant with coincident thermal energy generation design for the Port Heiden generating facility.The location's Class 5 rated wind resource provides the primary basis for this recommendation.In such a design,total wind generating capacity exceeds the community peak power demand by approximately 70 to 100%.Through such capacity and configuration,the engine generators will literally be shut off during periods of relatively high wind speed,defined as above 16 miles per hour.Additionally and importantly,during high wind periods the high penetration design will produce excess electric energy which is converted to thermal energy and stored for use as space heating or other beneficial application through a hot water storage and distribution system. In a low penetration design,the diesel units must continue to run regardless of wind speed. The wind generators run in constant parallel with the diesel units,which only serves to reduce load on the diesel generators.Such a configuration produces no cogenerated by-product,such as hot water.And in medium penetration design,there is minimal production of a cogenerated by product and relatively little wind-only mode operations,which struggles to justify its investment.By sizing sufficient wind turbine generating capacity to have "wind only” generation periods,as well as the simultaneous production of a beneficial thermal product,the high penetration design produces far greater total fuel avoidance,lower engine maintenance expense,and superior long term total system operating efficiencies compared to the low or medium penetration system.Accordingly,TDX focused its analysis on the high penetration example. As proven in the Saint Paul Island example,and dozens of similar high penetration wind/diesel installations around the world,the high penetration design functions with utility grade reliability and efficiency when properly designed,deployed and maintained.Such a system is relatively simple,using standard components.The primary building blocks of a high penetration system include the wind generation equipment,microprocessor based sensors that simultaneously monitor instantaneous load and wind speed,specialized switchgear that allow the diesels and wind turbines to function together either in parallel or singly,and a hot water storage tank with associated thermal energy delivery infrastructure. A properly developed high penetration facility operates in diesel mode during periods of no wind,in wind-diesel parallel during moderate wind speed periods,and in full diesel-off,wind- only mode during wind periods of approximately 16 mph or higher.In a typical configuration, the electronic signal to commence wind-only mode occurs when the wind energy system is capable of producing approximately 120%of operating demand or a fixed incremental of output above the community load,for at least one hour.During these higher wind periods,the engine generator shuts off automatically and wind turbines follow community load and,in addition,supply excess energy to the water storage tank.In lower wind periods,the diesel generators supply intermittent charge to the water tank to maintain minimum temperature, typically set between 150 and 190 degrees Fahrenheit.The heated water can then be pumped through a piping and radiator network to supply space heating,or used in other beneficial community use application such as swimming pools or commercial activity.The excess-to- load wind energy offsets or eliminates heating fuel requirements. 10 The installation and operational cost 400 analysis provided in this report is based904[nw 100 Pertomance|Va NL on the integration of three Northwind 100 50 wind generators into the planned AEA 0 f diesel plant.While several aspects of the z f Fuhrlaender wind turbines appeal to us, 3 f including their industry experience ing*/mass producing wind turbines in the"0 competitive European market and their 30 7 specific experience and track record 20 /producing and supporting both their 100 10 Pa and 250 kw machines,the increased cost 8 Th bb »»oo of their equipment simply does not"10 support its selection. Wind Speed -mph TDX believes Northern Power and Fuhrlaender are the only manufacturers capable of supplying and after-sale supporting the type of small scale,high quality equipment appropriate for Port Heiden.Another producer of small wind turbines,Atlantic Orient Corporation,could also be considered for this project.However,after-sale support is often limited due to the Company's small size,and the turbine's downwind design is less than ideal for a high penetration configuration in Port Heiden due to high wind speed and turbulent conditions.Further,the AOC's lattice tower would probably create a variety of issues with the Fish and Wildlife Service which could delay or perhaps ultimately prohibit the project's implementation.Beyond these three manufacturers,the world's leading wind machine vendors now only offer 750 Kilowatt class and larger equipment.In TDX's opinion,these units are far too large for village power application. Wind System Installation Cost TDX Power estimates a total cost of $1,446,000 to fully construct and integrate a three unit,Northwind 100 wind generation facility,with an associated thermal storage and delivery system.Following is an itemized breakdown of the major components included in the cost projection: 3 Northwind 100 wind turbines =$765,000 Site construction =$450,000 Switchgear &controls =$190,000 Thermal storage and distribution infrastructure =$21,000 System components shipment from Seattle =$20,000wWPYwnr The cost analysis assumes three Northwind 100 machines,which would be supplied FOB the Port of Seattle and complete with all necessary subsystems including towers and controllers. TDX Power believes that the wind energy component of the new AEA power system must have at least 250 kilowatts of total gross capacity in order to achieve optimum wind-only mode,high penetration design results.As any less than three Northwind generators do not meet the capacity criteria,three are suggested and modeled. The site construction estimate was supplied by Jim Saint George and includes turbine foundations.The construction estimate was based on certain assumptions such as piling design foundations,and assumptions of probable soil and subsurface aquifer conditions. While the cost estimate seems reasonable under the circumstances,TDX cautions that geotechnical work has not been completed at the probable Port Heiden location and subject to these further investigations,the construction cost estimate could change. The switchgear cost estimate is based on TDX's assumption and recommendation of Kohler paralleling gear in a five section line up.This equipment contains circuit breakers and PLC based controls,a master control section and a section for feeder control.The Kohler system is controlled from a local touch screen and capable of remote operation via a standard WEB browser.The operator interface uses the Advantech touch screen for alarm display,alarm and status logging (500 events),user selectable remote alarms,digital synchronizer,digital real (KW)and reactive (KVAR)load sharing,system information and data display,manual synchronizing and operator control.The engine generator control cells,master section and sectionalizing cells are bussed together.The main buss is rated at 2,000 amps at a typical buss voltage of 480,3-phase,4-wire.The Kohler system has the ability to control and monitor a variety of diesel/generator equipment and provide operating personnel with the ability to operate in a total manual mode in the event of PC or PLC failure. The thermal storage and hot water delivery system price is based on the assumption and recommendation of 8,000 gallons of storage capacity,to be located near or adjacent to the Port Heiden school boiler house.The cost estimate includes the insulated storage tank and all necessary piping and pumps to circulate water at an average temperature of 170 degrees F. The hot water in the storage tank will replace or considerably offset fuel oil use for the school's thermal requirements.The school and outbuilding thermal use heat use,from September 1 through May 31,was provided by AEA's Mia Devine. Should a decision to pursue a low or medium penetration design be preferred,installation of one or two Northwind 100 turbines would decrease the installation costs.In addition to the savings on turbine costs,some savings would also be realized on site construction,and the switchgear and controls.TDX Power estimates the total installed capital costs for a low penetration system with only one turbine to be $746,000.Installation of a medium penetration system with two turbines would be $1,046,000. A power plant site plan is attached in Appendix B with three turbines sited around the power plant.As previously referenced,the siting of the wind turbines is somewhat subjective at this point,pending a geotechnical evaluation.However,a rough estimate of where the wind turbines could be placed is included to provide a general idea of distances.Both Northern Power and Fuhrlaender wind turbines should have the minimum 2 1/2 -3 rotor diameters between them,and no less than 10 diameters downwind.Based on data provided by AEA,we have assumed the prevailing winds are westerly,south westerly. Economic &Operational Impact of Wind Integration TDX's analysis of the effect of wind generation on the planned Port Heiden diesel plant was based on a full year of local met tower wind speed measurement.TDX was limited by partial data for community load analysis.AEA supplied detailed load figures for,essentially,the month of October.Through this incremental data,however,TDX was able to create a multiplier formula which allows the October data to be extrapolated over an entire year with good accuracy. ™T LETT [TI Port Helden Weekday Hourly |wonbehal420.0 Load Profile *wes soraOF1016 110.0 :fH |i"Lit e \ | AVE ie PA AT 90.0 y LA mie vA80.0 ah y t on oo 20 00 00) Hour of Day Accompanying and integral to this report is a detailed spreadsheet model that calculates and presents the operational and economic impact of the Northwind 100 based wind generation system on the AEA Port Heiden diesel plant.The information contained in the spreadsheet represents the bulk of TDX's analysis for this assignment and should be studied carefully. Again,the results presented in the spreadsheet are based on extrapolating a months worth of community load data.The information which follows in this section summarizes certain data extracted from the spreadsheet.To see the full presentation,all associated methodology and the support data,please refer to the CD which accompanies this report. Following is a summary of the methodology TDX used to reach its conclusions: For the diesel plant analysis,TDX obtained performance data from John Deere for the units being deployed by AEA in Port Heiden.TDX calculated partial loading fuel consumption by unit from OEM data and TDX's own heat rate analysis,then determined engine generator load following sequencing through professional judgment of best economic operating strategy.To create the operational and associated economic model of the AEA diesel plant when it is fully integrated with the wind energy component,TDX assumed the AEA facility would cycle and sequence its engine generators as follows: When required diesel load is >97 KW,the 192 KW machine is used When required diesel load is 38 to 97 KW,the 150 KW machine is used When required diesel load is 23 to 38 KW,the 86 KW machine is used When required diesel load is 23 to 9 KW,the 38 KW machine is used Port Heiden High Penetration Wind-Diesei System AEA provided 10 minute Summary of Equipment Use incremental wind speed -Avg data over the entire year.N mb r Operating facture Model MWH Hours Sars.Output Loadin 1 y 1umbeMukW9TDXreviewedestablish Diesel Generators hourly wind speedUnit1Yes__|J Deere |6081H 237.4 2,166 §72 109.6 57.2%.Unit2 |Yes [JDeere |6068H |259.6 |3,365 |907 |77.1 51.4%averages and potentialUnit3|Yes |JDeere |4045H[11.1 |366 |285 |30.4 35.3%speed variation.The windUnit4Yes|J Deere |3029T 47 289 225 16.4 43.0%'..Total |512.9 |6,186 |1,989 turbine electric production Wind Turbines for each operating hour,Unit 1 Yes NW 100}240.3 6,035 NA 39.8 38.8%: Unit2 |Yes pial NW 100]239.7 |6,029 |NA |39.6 |38.8%along with the probableUnit3|Yes wer TNw 400]239.7 |6,020 |NA 39.8 |38.8%instantaneous variation Total 719.6 6,031 Over 8760 °: Percent of total system 58.4%68.8%(increase or decrease)moutput,was obtained from Northern Power 100/19 output performance curve [page 4]via a "Lookup"function within the spreadsheet. The Port Heiden community electric demand data was supplied by AEA.The data was broken down by 15 minute increments covering the timeframe from October 7,2004 through October 28,2004.From this,TDX determined one hour average demand averages with potential instantaneous variation,increase or decrease,in demand.TDX then determined an hourly demand multiplier for each hour of each day for a typical weekly period.Monthly variations,relative to October,were determined based on generation figures for Port Heiden from PCE program records over the past 10 years.TDX then compared hourly village demand to the coincidental turbine output. The overall TDX analysis logic assumed:1)During periods of no wind,total power is supplied by the diesel generators,which also supply as-necessary intermittent charge to the thermal tank to maintain desired water temperature range.2)In wind-diesel mode,additional -load above village demand is provided based on the potential wind turbine output decrease due to normal real time variations and the desired preset margin.3)The system's switch to wind-only mode occurs when excess wind generation (compared to actual village load)is greater than the suggested preset margin,approximately 120%of measured load,plus the potential wind turbine output decrease due to normal real time variations.4)In wind-only mode all excess turbine generated energy is sent to the thermal storage tank. Following is a summary of TDX's modeling results for total integrated hybrid system operations: e Diesel only operations will consume 63,937 gallons of fuel oil annually,with total diesel plant production of 871.9 megawatt hours. e Fully integrated with the three wind generators,the diesel operations consumption will be reduced to 38,214 gallons annually and total diesel plant production will be reduced to 514.4 megawatt hours. e The hybrid integration reduces powerhouse fuel use by 40%. Following is a summary of TDX's modeling of the output of each diesel engine generator when operating with the wind component: e For the 192 KW rated Unit 1,total annual run hours =2,226 with average output KW of 109.6,resulting in average engine loading of 57.2%. e For the 150 KW rated Unit 2,total ran hours =3,305 with average output KW of 77.1, resulting in average engine loading of 51.3%. e For the 86 KW rated Unit 3,total annual run hours =285 with average output KW of 30.4,resulting in average engine loading of 35.3%. e For the 38 KW rated Unit 4,total annual run hours =289 with average output KW of 16.4,resulting in average engine loading of 43%. The high penetration design allows excess energy production relative to village load during high wind speed periods.Again based on a full year,following is the amount of excess energy which would be diverted to the thermal storage tank: e Total wind energy contribution to the thermal storage tank =1239.9 mmBtu's e Equilavent gallons of heating fuel supplied frm wind energy =11,653 e Net Gallons of heating fuel offset by the wind energy contribution =11,037 TDX assumes that all the thermal energy can be consumed throughout the school year. However,thermal energy is not provided during the summer months as designated by the data provided by Mia Devine.Energy from normal or excess power wind,Diesel and/or jacketwaterrequiresdissipationbyothermeansduringthisperiod.As a result,during non-heatingseason,no energy saving credit is taken for thermal tank.Further,during the heating season, no excess thermal energy above the hourly requirement is sent to the thermal tank. Essentially this means the program does not store energy if there is a deficit preceding it. Thermal energy,as required by the school and out buildings is consumed on an instantaneous hourly basis Summaryof High Penetration Wind-Diesel System The TDX model for the full earFuelUse_{Electric Thermal Tank . y Galons shows that adding the gross rated 300Gallons|mmBtu |MWH |Junot Reduction Kilowatt wind energy component to theote°* Diesel Generation Only AEA Port Heiden diesel plant would Diesel Engines_|63,937 |6,504 |8/2 |66 |616 provide generating fuel savings of 40%,ingHane Sete duction of projected consumptionWind-Diesel System a redu sumptl pessoas 4 36,108 -BE from 64,000 gallons to 38,000 gallons. Total 36,100 |5.068 |1,232 |1.238 |11,631 In addition,the model shows the wind Savings 25,828 j 3,435 359.1 1,172 11,015 i poe nas 25,628 |3 component would contribute a total of719.6 megawatt hours,the equivalent ofotalAnnualFuelSavingscoro26044,Sal 11,653 gallons of fuel,to the thermal tank. Operations and Maintenance TDX expects that reduction of engine run time will have generally commensurate and proportional effect on diesel powerhouse maintenance expense.At minimum,the run time reduction caused by the contribution of the wind energy component will extend the otherwise expected intervals for scheduled,preventative top and bottom end inspections and maintenance. O&M specific to the wind generation system,however,creates a new and critical category of operational responsibility and expense.Without a systematic preventative maintenance regime for the wind generators,performed by a knowledgeable and conscientious technician, TDX doubts the long term viability of such a project in Port Heiden.Although TDX is confident that the Northwind 100 is an advanced design capable of sustained duty in harsh environments,constant observation,basic care and the ability to immediately address alarm conditions is mandatory. In TDX's experience in similar climate conditions,gearbox failure is the most common cause of catastrophic turbine failure and unscheduled downtime.This will not be a factor if AEA uses the Northwind 100 as it uses a variable speed direct drive synchronous generator which eliminates a gearbox interface to the alternator.This arrangement should simplify the O&M program.Additionally,as the Northern units produce synchronous power,their use in this project would eliminate the need for a synchronous condenser,which is commonly used in hybrid designs to condition power produced by induction machines.Elimination of the condenser not only eliminates a key maintenance item,it eliminates approximately 15 Kilowatts of system parasitic load.These features of the Northern turbine will reduce operations complexities and some costs,but will in no way negate the need for systematic O&M procedures. The key component of a successful maintenance program is human.TDX strongly suggests that someone within the Port Heiden community be identified to address this job scope.The person needs to be of sufficient health to be able to routinely climb the towers,but otherwise age or gender should make no difference.Experience in the power generation field or experience with sophisticated equipment should not be a factor.TDX believes the main ingredients required to create a capable plant operator are attitude and training.The person who will succeed will want the job and the responsibility,and will be enthusiastic about learning.With the right person,TDX believes that approximately three weeks of factory training and two weeks on site training will enable the trainee to begin functioning professionally. From such a beginning,based on TDX's experience with similar situations,the operator will require between one and two years of steady support,which in most cases can be provided by telephone.Such ongoing contact increases operator confidence,improves system performance and pays long term dividends in lower costs and less unscheduled downtime.Northern Power, TDX or a variety of other experienced companies could provide these support services at minimal expense.Ideally,the wind plant operator would also be responsible for the entire hybrid plant,including its thermal component.TDX estimates that such an employee would expect an annual salary in the $40,000 to $50,000 per year range. In addition to training and support programs,TDX recommends an inventory of spare parts be maintained in Port Heiden.Also,equipment manufacturers publish rigid service interval recommendations,and strict observance is the key to reliability.On site spares are vital,and the inventory contributes to the operator's understanding of how equipment is actually being used. TDX suggests that the type and quantity of spares on-hand should target equipment that is either subject to high stress cycles or equipment that significantly contributes to the system's peak performance and reliability.These target areas include: Critical engine and control system spares Engine control and master control cells Distribution feeder cell spares Wind turbine and ancillary control system spares Thermal storage system spares Equipment failure is most likely to occur during initial start-up through approximately the first years'operation.Repair and most parts will be covered by manufacturer's warranties in this timeframe and the spares inventory should be adjusted based on events,experience and trends.Operations through the second and third year typically involve scheduled component change,which should follow the recommended protocol specified by the manufacturer.As is typical with virtually all new power plants,the most critical time is the fourth and fifth year of operation.During this prone-to-failure period the parts inventory should be thoughtfully adjusted to address general local experience and historical failure trends. TDX suggest a budget of $12,800 for an adequate spare inventory covering the first full year of Port Heiden hybrid operations. Final Observations TDX based its modeling on the Northwind 100 in a three unit configuration as this level of turbine capacity created optimized fuel savings performance in wind-only mode.If the AEA wishes to see a one or two machine performance profile,the attached model allows for these configurations. The price of the Northwind machine was surprising.TDX paid approximately $350,000 for the 225 Kilowatt Vestas V27 deployed in its Saint Paul project,equal to $1,555 per installed nameplate Kilowatt.(The V27 is no longer made as Vestas is now focused on megawatt class -machines for application in major scale,grid connected wind farms.)The Northern quote for the Northwind 100 is equivalent to $2,550 per nameplate Kilowatt.However,perspective was gained when TDX researched the list price for the Fuhrlaender turbines,in both the 100 and 250 Kilowatt size.The price of the Fuhrlaender 100 was $379,764,equivalent to $3,797 per Kilowatt.The Fuhrlaender 250 price was $520,411,or $2,122 per nameplate Kilowatt. Finally,AEA will note that TDX assumed full turbine availability in its analysis.From TDX's experience on Saint Paul Island,such reliability is quite achievable with first class equipment and a dedicated,conscientious O&M regime. Appendix A:Notes to Spreadsheets Each of the four spreadsheets supplied by TDX to AEA begin with extensive descriptive notes.Following are general comments on these notes,which track the Note numbers of the submission: Note 1:Hourly wind data provided by AEA,adjusted to wind turbine height of 30 m for generic 8760 hour year. Note 2:Port Heiden community load data provided by AEA.Typical variation by day and hour for a week was determined and used as a predictor for weekly use.[See Table 1] Note 3:Similar to Note 2 above.The monthly variations were obtained from Port Heiden PCE data over ten years and used to determine the monthly variation.The variation was then applied to the respective months.October,2004 is used as the base period. Note 4:Holidays used are New Years Day,Memorial Day,July 4",Labor Day, Thanksgiving,and Christmas Day. Note 5:Variability of wind is used to place a value on the potential drop (change)in wind turbine output due to a drop in wind speed.The potential loss in power is added to the Diesel operating load,during wind-diesel combined operation mode,to make sure the Diesel engines can provide required power to the community,should the turbine output instantaneously drop the variable amount.Ten minute wind data from the initial 4231 hour data file was reviewed and analyzed.TDX determined that the turbine output varied by approximately 12.3 percent of its average load. Note 6:A multiplier is added to simulate potential community load growth .The percentage increase is an input value. Note 7:Operating Margin is the "safety factor”above which the wind turbines need to produce power before the diesels are allowed to shut down.The operating margin in kW is an input value. Note 8:Minimum time for diesel to run is one hour. Note 9:Turbine parasitic load accounts for electrical switchgear and/or synchronous condenser load.The Northern 100 is the net output,while the Fuhrlaender output does not include probable synchronous condenser losses.The parasitic load in kW is an input value. Note 10:Heat loss from thermal tank of approximately 10,000.TDX calculated the heat loss from an 8,000 gallon tank (8 ft diameter and 21 ft long)with three inches of fiberglass insulation at an average temperature of 180 °F.This is converted to an electrical load and used to maintain (overcome)losses during the heating season.The load is added to the required Diesel Operating Load when the wind-diesel system is operating in Diesel Only mode during the heating season.The heat loss in Btu/hr is an input value. Note 11:Describes the logic of determining Diesel Operating Load. Note 12:School and outbuilding thermal load.This information was received from Mia Devin of AEA.Data is also used as a test to determine the maximum excess energy allowedtobesuppliedtothethermalsystem. Note 13:Describes the logic of supplying heat to the thermal tank. Note 14:The value is used to estimate jacket water energy available to supply energy to the thermal tank.No information is available for jacket water energy from the John Deere units, sO a representative value based on fuel input is used.The percentage is an input value. Note 15:Wind turbine availability or degradation provides a way to reduce output from the wind turbines.The availability percentage is an input value. Note 16:Describes method of providing diesel engine fuel.A part load fuel use antilogarithm was determined for each of the four John Deere engines,based on performance data obtained from John Deere for these engines. Note 17:Provides energy value of fuel oil for diesel operation and building heating.The Btu values per pound and per gallon (lower heating value basis)are input values. Note 18:Provides an estimate of the school boiler efficiency.This is used to determine the gallons of fuel saved for the thermal tank part of the "Summary Table.”The efficiency is an input value. Note 19:Self description of major changes in model revision. Appendix B:City of Port Heiden Power Plant Site Plan it tORASE,Fle oe. :*.-.Wind Turbineeeaha. Wind Turbine vow Gt eneBr] KZ rd Wind Turbine AEA ECONOMIC ANALYSIS _ WIND /DIESEL HYBRID SYSTEM PORT HEIDEN,ALASKA Economic Modeling of the Potential Wind-Diesel System in Port Heiden using HOMER INPUTS Project Lifetime The economic lifetime of the project is assumed to be 20 years. Diesel Fuel The cost of diesel fuel is assumed to remain at a constant $2.00/gallon rate over the life of the project.HOMER is not able to model a fuel inflation rate at this time. No economic value is applied to the diesel fuel that is used to heat the school since it is unknown whether or not the school will pay for heat recovered from the power plant or the wind turbine dump load., Diesel Generators The following table lists the cost and timing of major overhauls of the diesel generators. Minor overhauls are not included in the model;however,an hourly O&M cost is calculated based on the cost of regular oil changes and minor repairs.With this economic setup,there are no replacement costs of the diesel gensets,they simply continue to receive major overhauls throughout the life of the project. Diesel Model |Major Overhaul |Major Overhaul O&M Cost Period (S/hour of operation) JD 86 kW $20,000 15,000 hours $5 JD 150kW $25,000 15,000 hours $5 JD 192 kW $70,000 25,000 hours $5 The installed cost of the diesel power plant is input as a fixed system cost,since it will be included regardless of the number of wind turbines installed.A total cost of $1,800,000 is used. Wind Turbines &Related Components The table below lists the total installed cost and annual O&M cost of various wind turbine scenarios.The wind turbine models are the Northern Power Northwind100 (NW100),the Fuhrlander 100kW (FL100)and the refurbished Vestas (V27). Wind Turbine Type Capital Cost of Annual O&M and Number Wind System Cost 1 x NW100 $565,000 $5,000/yr 2 x NW100 $970,000 $10,000/yr 3 x NW100 $1,400,000 $15,000/yr 1 x FL100 $650,000 $5,000/yr 2 x FL100 $1,200,000 $10,000/yr 3 x FL100 $1,750,000 $15,000/yr 1 x V27 $650,000 $20,000/yr Interest Rate The annual real interest rate (discount rate)is set at 3%. Inter-annual Fluctuations in Assumptions HOMER assumes that the electric load,thermal load,and wind resource will not change from year to year.HOMER is therefore modeling a typical year of data and basing its lifecycle economics on the results of that year.This tends to be a conservative method because if the village load grows,excess electricity from the wind turbines would displace the more expensive electric energy rather than the less valuable thermal energy. OUTPUTS Power Performance The table below summarizes the power production and fuel consumption of each of the proposed power systems.Note that HOMER only allows 3 diesel generators,so the smallest generator was left out of the model.This isn't expected to have a significant impact on the results. MWh Generated Fuel Use (gal)_[Fuel Savings (gal)Diesel Generator Hours of Operation System |tutines|gonset |gonst [genset]Plant |S|'pant Stl]Genser |goneat |genet genset |7! Diesel-only wi heat 0 462 384 a 62,300 4800 0 7700 |4,281 4479 i)-8,760 recovery 1x NW100 |242 180 397 33 46,000 |6800 |16300 5700]1,689 5395 |1671 -8,755 2x NW100 |484 149 303 31 36,600 :5700 |25700 6800]1397 4094 |2033 -7 524 3x NW100 |727 138 257 27 31,900 |4800 |30400 7,700]1,291 3.435 |1,707 -6,433 1xFLIOO |340 160 348 39 40,800 .6900 |21,500 5600}1,413 4723 |2579 -8715 2xFLI00 |680 116 272 23 31,700 :4,900 |30,600 7600 |1,088 3,689 |1,684 -6661 3x FLIGO |1020 101 237 23 27,400 )4,200 |34,900 |6300 950 3,214 |1,593 -5757 1x FL250 |760 98 260 28 29,400 _4800 |32,900:7,700 922 3.636 |1,834 -6392 1 x V27 665 6 348 62 31,700 |6000 |30600 |7500 45 4069 |2,460 -6 574 Economics The table below shows the economic results of each system configuration based on the assumptions described above. System Description Initial Cost Net Present Value of Costs Diesel-only $1,650,000 $4,320,000 1 x NW100 $2,340,000 $4,570,000 2x NW100 $2,690,000 $4,600,000 3 x NW100 $3,100,000 $4,830,000 1 x FL100 $2,300,000 $4,370,000 2 x FL100 $2,850,000 $4,510,000 3 x FL100 $3,400,000 $4,920,000 1x V27 $2,300,000 $4,110,000 As shown,the wind-diesel system utilizing the refurbished V27 wind turbine results in the lowest net present cost. There are a number of benefits of the wind-diesel system that are not included in the economics,which may make the wind-diesel more appealing.These benefits include reduced emissions,less vulnerability to fluctuations in the price of fuel,reduced diesel fuel storage requirements,the potential value of thermal energy to the school,the potential sale of green tags,and adding to the experience and knowledge base of wind- diesel systems in Alaska. Sensitivity Analysis The spider graph below illustrates how the net present cost of the Vestas V27 case is affected by changes in the input variables.The point where all the lines intersect represents the net present cost of the most likely scenario based on the best estimate of all the variables. ow Wind Speed ==Arctic Diesel Price ==27 Capital Multiplier swe V¥27 O&M MultipliervA-Interest Rate 4,400,000 Best Estimate Wind Speed =7.02 mis Arctic Diesel Price =$0.53/La\La ¥27 Capital Multiplier =4aeV2?O&M Muttiplier =4 4,200,000 oY GEan Interest Rate =3% 4,000,000 |a IN.''rd Spider Graph4,600,000 TotalHetPresentCost($)p"Wel 3,800,00006 68 10 12 14 16 48 Value Relative to Best Estimate As shown,the net present cost is most sensitive to the wind resource and the price of diesel fuel.In order for the wind-diesel system to have a higher lifecycle cost than the diesel only system,the wind resource would have to be 10%less than expected,the installed cost of the wind turbine would have to be 30%greater than expected,the O&M cost would have to be about 60%greater than expected,or some combination of these situations would have to occur. APPENDIX E CONSTRUCTION COST ESTIMATE CRW Engineering Group LLC PORT HEIDEN RURAL POWER SYSTEM UPGRADE May 2005 CONCEPTUAL COST ESTIMATE * COST CATEGORIES MATERIALS AND FREIGHT LABOR RENTAL TASK TEM QTY JUNI COST MATL COST_[UNIT WEIGHT [TOTAL WEIGHT [FREIGHT COST ICATEGORY MANHR_[UNIT COST [LABOR TOTAL _|RATE (MONTH)_[COST TASK SUB-TOTALS | 1-Mob and Demob j Task Description:Mob and demob covers ail j Operators (2)240 $60 $14,400 Material $0 consolidation,barge loading and off loading,:Truck Drivers (1)120 '$60 $7,200 Freight $0 lcarnp setup and staging of materials on site.:Laborers (2)240 $60 :$14,400 Labor $36,000 This task will take approximately 2weeks.:Rentat $0 i ttem 1 Total -$36,000 2-Gravel Pad and Concrete Pedestal i Foundation Task Description:Items will include all Pre-Cast Concrete (CY)3 :$500 $1,500 4000 12000 $7,200 Operators (1)60 $60 $3,600 Material $1,700 earthwork required to provide a stable gravel Gravel Royalties-Foundation and ' foundation pad,fabrication and placement of Access Road 100 $2 $200 Truck Drivers (1)£30 $60 '$1,800 Freight $7,200 concrete foundation pedestals.This task will Laborers (2)120 $60 {$7,200 Labor $12,600 take approximately 1 week.Rental $0 {tem 2 Total -$21,500 3-14'x 38'Modular Power Plant Fabrication and Field Erection* Task Description:Item will include fabrication Lump Sum 1 $472,500 $472,500 60000 60000 $36,000 Fabrication 1100 $82,500 Material $472,500 of the module in Anchorage,setting the .Field Setup:Freight $36,000 module,securing the module to the concrete Operator (1)120 $7,200 Labor $114,300 pedestals,and performing all electrical and Laborer (2)240 $14,400 Rental $0 mechanical tasks necessary for startup.The Electrician (1)120 $10,200 Item 3 Total -$622,800 field work portion of thei task will take approximately 2 week. 4-Power Plant Fuel Storage and Delivery System Task Description:This item will include Timber Pipe Supports 10 $30 $300 35 350 $210 Operator (1)20 $60 '$1,200 Material $5,700relocatinganexisting12,000-gallon AST from Fence 120 $45 $5,400 10 1200 $720 Welder (1)30 $75 :$2,250 Freight $930 the existing powerplant to the new site,Laborers (2)120 $60 $7,200 Labor $10,650 plumbing the tank to the module and installing Rentat $o fence and signage.This task will take Item 4 Total -$17,280 approximately1 week. 5-OF i y Upgrad Task Description:This itern will include New Primary Conductor (ft)3,000 :$50 1 3000 Lineman (1)240 $85 :$20,400 Material $284,000 installation new primary and secondary New Secondary Conductor (ft)1000 =:$50 1 1000 Operator (1)240 $60 $14,400 Freight $11 430voltageburiedconductor,new transformers 3-phase transformers §$6,000 1000 5000 Laborer (1)240 $60 $14,400 Labor $49,200 and residential meters and other system 1-phase transformers 13 $3,000 600 7800 Rental $0 repairs as necessary.This task will take Meters (50%ot Existing)30 $500 78 2250 Item 5 Total -$344,630 approximately 4 weeks. 6-Miscellaneous** Crew Per Diem (md)360 $40 $14,400 Maternal $56,400 Crew Housing (mo)3 '$4,000 '$12,000 Freight $80,000Superintendent720$95 $68,400 Labor $68,400EquipmentRental(mo)Rental $43,000TrackedExcavator17000070000SeeBelow$12,000 1$12,000 Item 6 Total -$247,800WheeledLoader(966)1 50500 50500 See Below $9,000 |$9,000Dozer(D6)1 45000 45000 See Below $7,000 $7,000 Articulated Dump 1 45000 45000 See Below $10,000 $40,000 Drum Compactor 1 25000 25000 See Below $5,000 $5,000 Equipment Shipping-Naknek to Port Heiden*1 $40,000 Equipment Shipping-Port Heiden to Naknek*1 $40,000 Fuel 1 $10,000 :$10,000 Toot Rental 3 :$5,000 $15,000 Consumables 1 $5,000 $5,000 CATEGORY SUBTOTALS $820,300 $135,560 $291,150 $43,000 TASK SUBTOTAL $1,290,010 10%CONTINGENCY $129,001CONSTRUCTIONSUBTOTAL$1,419,017 '7-Other Project Costs Insurance 1 $30,225 $30,225 Engineering 1 $100,000 $100,000 Construction Management 1 $100,000 :$100,000 Itern 7 Total -$230,225 *Costs for item 3 are based upon an estimate prepared by Alaska Energy and Engineering,Inc.on June 15,2004 "Equip ipping costs Include barge charter at $10,000 per day Cost Estimate-1 Project Grand Total $1,649,236