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Cordova Public Utilities Construction Work Plan 1977
CORDOVA PUBLIC UTILITI Cordove, Alaske Electric Distribution System {277 Construction Work Plan LIERARY COPY PROPERTY OF: Alaska Power Authority 334 W. 5th Ave. Anchorage, Alaska 99501 | @ MARKS ENGINEERING MARKS ENGINEERING October: 17.1977 See Cordova Public Utilities Box 20 Cordova, Alaska 99574 Att: Mr. Gerald R. Meyer, Utilities Manager Subject: 1977-1979 Two Year Construction Work Plan Dear Mr. Meyer: Enclosed are ten (10) copies of the 1977-1979 Two Year Construction Work Plan to support your application for R.E.A. Funds to install new distribution feeders to serve new consumers. I would like to express my appreciation to the Cordova Public Utilities Board, to you, Mr. Hartman, and Mrs. Weinrich for making this study possible. Very Truly Yours, 2, Gee KA = Se ee cateond J, Aa Marks “PE, Joe A. Marks, P.E., 740 West 75th Avenue, Anchorage, Alaska 99502 (907) 344-4279 oo. CORODVA PUBLIC UTILITIES ALASKA 16, CORDOVA ELECTRIC DISTRIBUTION SYSTEM 1977 CONSTRUCTION WORK PLAN 740 West 75th Avenue, Anchorage, Alaska 99502 (907) 344-4279 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1.9.7:7=19:79 TABLE OF CONTENTS INTRODUCTION: RBA CMAP = oe a a ee PURPOSE OF REPORT - SUMMARY - RG COMMENDAUHONG ooo ects oo rg say INVESIMENT -OCHBDULEO?. © ot te 8 SYSTEM-ANALY Ghote ae er VGUEPAGE Sa ROD: : SEI Bie ee eo aie CONSTRUG-LION~-P ROGRAM 3-2 a9 sei. tee eP SERVICE STANDARDS §& CONSUMPTION - - °+52 PXUERET GS eee ee ee es Gea 1977 POWER REQUIREMENTS STUDY - wo dN DISTRIBUTION SYSTEM DIAGRAMS BH w NI INTRODUCTION AND PURPOSE OF THE REPORT CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 19771979 INTRODUCTION Cordova Public Utilities located in Cordova, Alaska, is the only power supplier serving Act and Non Act beneficiaries in and around the town of Cordova. In 1968, R.E.A. approved a $223,000 loan to construct a 15 KV line extension to Mile 13 on the Copper River Highway and a 15 KV line extension to Three Mile Bay along Whitshed Road to serve residential and commercial consumers. Loan funds were not appropriated at that time for the additional generation requirements. In 1977, Cordova Public Utilties requested R.E.A. funding assistance in the construction of new line extensions and additional generation facilities to serve new consumers. | | | __ (CORDOVA C-6F ef iv 6 C44. i fg he? Seale mea N ow ‘ Gases pl Lene fg M(.. 52 ieafoeva 8-5” ths nw Mapped, edited, and published by the Geological Survey "ALE 163360 ~% a Control by USGS and USCAGS toneod fl = ata pia eons eee ROAD CLASSIFICATION ‘Oy e Tegner ant by phologrammetic methorls om arta photog apt " ieee tele notes aime rpc Medium duty = Uh ty %, & ahen 1950, field annntated 1951 Map not field checked z 4 faa Peeeceaals : 2 Eat 2 ns Unimproved dit. = ~e e Selected hydrographic data compiled Irom USCAGS 3 OS ee ~~ Charts 8520, £525, and A551 (1:20. 000 seated J ee . Osiate Roxte N} Ths information is not intended! for navigational purroves ?] ¢ Der cnet ATM MEAN LN Lm ATT — q Ar Mov wth rn 4 wir th romnee na MPS S on ie a tna tears seo ee mnt FH 00 lel grid based on Alaska coordinate system, rone 3 aremconneant oF aN CORDOVA (C-5), ALASKA 1000 meter Universal Transverse Mercator grid licks, ECE MANON, 191 zone 6, chown in blue eae 16030 — W145 2015122 5 The purpose of this report is to outline Cordova's generation and electric distribution construction programs for the years 1977 to 1987 as well as basic data for use in preparation of capital expenditure budgets. 7s CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 PURPOSE OF REPORT | i i } { ' | —_— SUMMARY AND RECOMMENDATIONS CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197.7= 19:79 SUMMARY Cordova's present, reliable, firm generation capacity is 1950 KW and is not adequate to meet the system's requirements expected to peak at 3100 KW this winter. Cordova's present 2,400 volt distribution system operates with unacceptable voltage drops ranging from 10.4% to 16.7% and corresponding losses. Cordova's Power Plant and Feeder protective relaying and metering are not adequate to insure equipment and system protection, reliability, and energy accountability. during the last several years and are projected to continue Cordova's power requirements have been increasing steadily | increasing at a rate exceeding 9% per year. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 RECOMMENDATIONS The Cordova Public Utilities Board should: * Purchase and install interim Diesel Generation, refurbished, 1500KW to 2000 KW to meet minimum firm generation capacity during next 6-9 months. Purchase and install a refurbished and warranted 2,650 KW Diesel Generator at a new pliant site by mid 1978. Relocate the substation to the new plant site and install two new main power feeders to serve Cordova's canneries on one feeder and residential and commercial consumers on the second feeder. Relocate existing Diesel Generators Units 1 and 2 to the new plant site by late 1978. * Purchase and install a new, 3,500 KW Diesel Generator at the new plant site by 1979. Proceed with new line extensions to Orca, Three Mile Bay, F.A.A., and sectionalizing in 1978. * Convert the downtown 2,400 volt feeders to 12,470 volts as soon as practicable. * Proceed with steps to develop a 5,000 KW run of river hydroelectric plant at Power Creek by 1982. Adopt R.E.A. administrative and engineering standards and procedures to improve system accountability, performance, and reliability. GENERATION AND DISTRIBUTION INVESTMENT SCHEDULE GENERATION DISTRIBUTION, NEW CONSTRUCTION DISTRIBUTION, IMPROVEMENTS HEADQUARTERS GENERAL PLANT ($1,000) CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 INVESTMENT SCHEDULE | SUMMARY 1980 1981 1982 1983 1984 1986 1987 6000 85 8000 60 660 500 250 50 50 50 200 75 75 75 75 250 Seeesesesesesesssseesssseeseeseessssesssses sees es esssssstesssesssessssessse5 5370 2310 609 110 8860 135 130 130 140 6335 CORDOVA PUBLIC UTILITIES INVESTMENT SCHEDULE 1977 1979 1980 1981 1982 1984 1985 1986 1987 GENERATION ($1,000) Interim Generation Plant Relocation Diesel Generator Unit 3 Diesel Generator Unit 4 Power Creek Unit 6 Turbine/Recovery Unit 7 HEADQUARTERS Office Facilities ACQUISITIONS CENERAL PLANT Vehicles and Equipment q 16 60 40 140 50 f 209 INVESTMENT ALLOCATIONS WERE BASED ON THE MBER OF ACT AND NON ACT BENEFICIARIES AS DETERMINED IN THE 1977 POWER REQUIRE S STUDY. CORDOVA PUBLIC UTILITIES INVESTMENT SCHEDULE 1977 1979 1980 1981 1982 1983 1984 1985 1986 1987 DISTRIBUTION, NEW CONSTRUCTION ($1,000) New Orca Feeder ACT NON Three Mile Bay Feeder ACT NON F.A.A. Feeder Extension ACT NON New Residential Services ‘ ACT NON New Commercial Services ACT NON New Large Power Services ACT NON Power Creek Feeder ACT NON TOTAL ACT NON DISTRIBUTION, IMPROVEMENTS Relocate Main Feeders Dock Feeder Conversion F.A.A. Feeder Conversion NOTE: Sectionalizing INVESTMENT ALLOCATIONS WERE BASED ON THE NUMBER OF ACT AND NON ACT BENEFICIARIES AS DETERMINED IN THE 1977 POWER REQUIREMENTS Feeder No.2 Conversion STUDY. Feeder No.4 Conversion TOTAL CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN TWO YEAR INVESTMENT BREAKDOWN GENERATION ACT NON ACT TOTAL INTERIM GENERATION (EMERGENCY 2000 KW) $ 30,000 $ 120,000 $ 150,000 LAND AND LAND RIGHTS 85,000 330,000 415,000 STRUCTURES AND IMPROVEMENTS 330,000 1,320,000 1,650,000 ROADS 0 100,000 100,000 MECHANICAL EQUIPMENT ( 5300 KW DIESEL ) 1,000,000 650,000 1,650,000 ELECTRICAL EQUIPMENT 600,000 140,000 740,000 STEP UP SUBSTATION (10,000 KVA 4.16-12.47kv) 160,000 100,000 260,000 ENGINEERING FEES 325,000 410,000 735,000 POWER CREEK PRELIMINARY STUDIES §& SURVEYS 0 370,000 370,000 TOTAL**##44e | $2,530,000 3,540,000 6,070,000 NOTE: INVESTMENT ALLOCATIONS WERE BASED ON THE NUMBER OF ACT AND NON ACT BENEFICTARIES AS DETERMINED IN THE 1977 POWER REQUIREMENTS STUDY. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN TWO YEAR INVESTMENT BREAKDOWN CONSTRUCTION COST TRANS FORMERS/METERS ENGINEERING FEES TOTAL COSTS NEW LINES, UNDERGROUND Orca Feeder 1.2 miles $ 86,000 $ 18,000 $ 14,000 $ 118,000 ACT 0 0 0 0 New Main Power Feeders 52,000 8,000 60,000 0 ACT 208,000 0 32,000 240,000 NEW LINES, OVERHEAD Three Mile Bay Feeder 3.0 miles 110,000 F ‘ 0 F.A.A. Feeder Extension 3 miles 110,000 0 CONVERSIONS §& IMPROVEMENTS Dock Feeder Conversion 0.4 mile 0 : 0 44,000 62,000 F.A.A. Feeder Conversion 3 miles 45,000 55,000 0 0 NO.2 Feeder Conversion 3 miles 0 0 ° 235,000 370,000 NO.4 Feeder Conversion 1 mile 0 0 E 65,000 125,000 Sectionalizing 8,000 10,000 32,000 40,000 Work Plans 10,090 0 TOTALAARARA RRR 346,000 473,000 T 584,000 837,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN TWO YEAR INVESTMENT BREAKDOWN GENERAL PLANT ACT NON ACT TOTAL OFFICE EQUIPMENT °& COMPUTER $ 20,000 80,000 $ 100,000 BUCKET TRUCK 16,000 64,000 80,000 TRENCHER 4,000 16,000 20,000 SERVICE TRUCK 4,000 16,000 20,000 PICKUPS 4,000 16,000 20,000 LINE TOOLS § EQUIPMENT 6,000 24,000 30,000 TEST EQUIPMENT 6,000 24,000 30,000 ROTALEERAERE $ 60,000 240,000 300,000 NOTE: INVESTMENT ALLOCATIONS WERE BASED ON THE NUMBER OF ACT AND NON ACT BENEFICIARIES AS DETERMINED IN THE 1977 POWER REQUIREMENTS STUDY. SYSTEM ANALYSIS Sete CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN T9'7-7-- 1979 SYSTEM ANALYSIS Eyak Power Plant At present, all of Cordova's power requirements are served by the existing Eyak Power Plant consisting of six (6) diesel generators. Four (4) of the generators are over thirty (30) years old. Two (2) of the units are out of service permanently. Two (2) of the units are not considered reliable. The total reliable capacity at present is 4,250 KW and firm capacity is 1,950 KW. Present system peak demand is 2,900 KW. The plant borders on the southwest shore of Eyak Lake, a large scenic water body bordering the eastern portion of the City of Cordova. Cooling water for the diesel generators is drawn from the Lake via a cooling pond. Oil and ice fog pollution problems have arisen and the Environmental Protection Agency has fined the Cordova Public Utilities Board as a result. Cordovans living in the vicinity of the plant have also voiced strong objections to the noise and ice fog pollution attributed Expansion of the plant at to the power plant operations. the present site is limited by other buildings and installations. -15- CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 19:7:7-1979 SYSTEM ANALYSIS Eyak Power Plant Substation The existing electric distribution system consists of the Eyak Power Plant Substation, two 2400 volt and two 12,500 volt feeders. NON-ACT beneficiaries are presently served by 2400 volt and 12,500 volt feeders, while ACT beneficiaries are served by 12,500 volt feeders. The Eyak Power Plant Substation consists of one 2400 volt string bus, one 12,500 volt string bus, two 5000 KVA, 2400 - 12,500 volt main power transformers, three oil re- closers, and one 150 KVA station service transformer bank. generators 1 and 2 to No. 1 Main Power Transformer. The bottom lugs of the air disconnects are approximately seven feet from the substation grade. | Three 2400 volt, single air disconnects connect engine The top of the 2400 volt and 12,500 volt reclosers and cable terminators for three feeders are approximately five feet from the substation grade. The cable terminators for the CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN Ag ee. SYSTEM ANALYSIS Eyak Power Plant Substation (continued) fourth 15 KV feeder are approximately two (2) feet from the substation grade and are connected to the overhead 15 KV string bus via bare conductors within easy reach of personnel. The 2,400 volt and 12,470 volt string buses are approximately ten (10) feet from the substation grade. The tops of the station service transformer bank are approximately three (3) feet from the substation grade and are connected to the 2,400 volt string bus via bare copper tubing within easy reach of personnel. All four distribution feeders are routed via URD cables to nearby overhead lines. Feeder breakers consist of old, oil filled reclosers. No. 2 main power transformer is not connected at this time. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS PROTECTIVE RELAYING AND METERING Existing generators are delta connected 2400 volt and do not have differential or ground fault current protection. The main power transformers, 5 MVA, 2400-12470 volts, do not have differential, ground fault, or sudden pressure protection. The main. town feeders and the station service feeders do not have ground fault relaying and do not have kilowatt hour meters. Automatic reclosers are not utilized on any of the feeders. Line fuses, feeder breakers, and generator breakers are not coordinated. C.P.U. generation reports are included in the Appendix of this report and elaborate further on the condition and operation of the system. SER CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977 =1979 SYSTEM ANALYSIS DISTRIBUTION FEEDERS At present, four (4) feeders serve Cordova and originate at the Eyak Power Plant Substation. Two (2) feeders are 2,400 volt delta, and two (2) feeders are 12,470 volt wye. FEEDER NO.1 Feeder No.1 is a 12,470 volt feeder serving eighty two (82) residential and one (1) large commercial loads. Approximately three (3) miles of this feeder are overhead construction and seven (7) miles are underground construction. Calculations indicate a 1.9% voltage drop at the end of the feeder at the F.A.A. facility near the airport. Kilowatt hour metering is not installed on the feeder and loss comparisons can not be determined from meter reading records. C.P.U. operating reports have been initiated recently, however, sufficient operating data is not available to render a determination on its reliability. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS FEEDER NO.1 12,470 volts Voltage recordings obtained at the end of Feeder No.1, ABC4, range from 130 to 133 volts, a 2.3% spread. The voltage level at 130 volts is 10 volts greater than the desired 120 volt level and indicates that transformer taps should be changed. Phase current readings taken simultaneously at the substation on October 1, 1977 indicate readings of 8,14, and 18 amperes on phases A, B, and C respectively at noon. These readings indicate phase load imbalances and should be corrected by transfering loads as required to balance all phase currents. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN LOFT AOS, SYSTEM ANALAYSIS DATA : = rs ee A Neen == SS SS a ee Zt ~ rm ma. x 3 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN DOP Oo) SYSTEM ANALYSIS CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS FEEDER NO.2 Feeder No.2 is a 2,400 volt overhead feeder approximately three (3) miles in length serving two hundred twenty seven (227) residential and small commercial consumers in the central town core. This feeder also serves two large commercial loads. Calculations indicate voltage drops ranging from 10.4% to 16.8% throughout the served area and represent unacceptable voltage levels. Kilowatt hour metering is not installed on the feeder and loss comparisons can not be determined. However, it can be inferred from the voltage drops above that this feeder operates with high losses. C.P.U. operating reports have been initiated recently, however, sufficient operating data is not available to render a determination on its reliability. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197 7-19:79 SYSTEM ANALYSIS FEEDER NO.2 2,400 volts Voltage recordings obtained on Feeder No.2, 2ABC2, range from 110 to 112 volts, a 1.8% spread. The voltage level at 110 volts is 10 volts less than the desired 120 volt level and indicates that transformer taps should be changed. Phase current readings taken simultaneously at the substation on October 1, 1977 indicate readings of 120,86, and 118 amperes on phases A, B, and C respectively at noon. These readings indicate a large load imbalance and should be corrected by transfering loads as required to balance the phase currents. p< 1977-1979 TWO YEAR WORK PLAN SYSTEM ANALYSIS DATA tS a + = + \ CORDOVA PUBLIC UTILITIES CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 97.7 = 1979 SYSTEM ANALYSIS DATA =26- CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS FEEDER NO.3 Feeder No. 3 is a 12,470 volt overhead feeder serving two hundred ninety five (295) residential and small commercial loads, and eighteen (18) large commercial loads which include the fish canneries. Calculations indicate voltage drops ranging from 0.9% to 1.8% throughout the served area Kilowatt hour metering is not installed on the feeder and loss comparisons can not be determined. C.P.U. operating reports have been initiated recently, however, sufficient operating data is not available to render a determination on its reliability. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 977-2979 SYSTEM ANALYSIS FEEDER NO.3 12,470 volts Voltage recordings obtained on Feeder No.3, 3ABC4, range from 105 to 115 volts, a 9.52% spread and indicates that the transformer loading should be checked. Phase current readings obtained simultaneously at the substation on September 25, 1977 indicate readings of 60,38, and 45 amperes on phases A, B, and C respectively at noon. These readings indicate a large load imbalance and should be corrected by transfering loads as required to balance the phase currents. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197.7-1979 SYSTEM ANALYSIS CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS DATA we IAD A SA ELPA I On mate Feet amine nose Z eee es CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN LO77-19:79 SYSTEM ANALYSIS FEEDER NO.4 Feeder No.4 is a 2,400 volt overhead feeder serving one hundred twenty six (126) residential and commercial loads and one (1) large commercial load. Calculations indicate voltage drops ranging from 2.8% to 4. 8% throughout the served area. Approximately 0.5 mile of 3%, 15 KV URD cable has been installed in a utiliduct to eventually replace this feeder. Kilowatt hour metering is not installed on the feeder and loss comparisons can not be determined. C.P.U. operating reports have been initiated recently, however, sufficient operating data is not available to render a determination on its reliability. CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-19.79 SYSTEM ANALYSIS FEEDER NO.4 2,400 volts Voltage recordings were not obtained on this feeder. Phase current readings taken simultaneously at the substation on September 25, 1977 indicate readings of 75,25, and 72 amperes on phases A,B, and C respectively at noon. These readings indicate a large load imbalance and should be corrected by transfering loads as required to balance the phase currents. CORDOVA PUBLIC UTILTIES TWO YEAR WORK PLAN TOT Lode SYSTEM ANALYSIS CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SYSTEM ANALYSIS PROJECTED VOLTAGE DROPS Projected voltage drops were determined by increasing consumers and monthly kwh consumption through 1980 on the propsed distribution system shown on drawing EDS-3. FEEDER NO.1 The number of consumers on the proposed new feeder to Orca, Feeder No.1 remained at 2 large power services thorugh 1980. The voltage drop at the end of the feeder is projected at 0.5%. FEEDER NO.2 For the period through 1980, residential consumers on propsed Feeder No.2 were increased from 525 to 597 and the monthly kwh consumption was incresed to 550 kwh per month per consumer. The highest voltage drop projected on this feeder is projected at 4.2%. FEEDER NO.3 For the period thorugh 1980, residential consumers on propsoed Feeder No.3 were increased from 152 to 180 consumers, commercial consumers were increased by 2, and monthly kwh consumption was increased to 550 kwh per month per consumer. The voltage drop projected is 2.8%. -32A- | U. $. DEPARTMENT OF AGRICULTURE ye Cae ee PUSST ATION SYSTEM DESIGN RURAL ELECTRIFICATION ADMINISTRATION Cordova Public Utilities Main 500 kwh/mo./cons. SYSTEM ENGINEER cIRCcUITS Marks Engineering’ ABC & 2ABC VOLTAGE DROP SHEET Page 1 of 2 DATE October 1977 Loan SECTION CONSUMERS CONCENTRATED DROP A sounce | Loan -| “yma [PEYONO Sie | mean | “rat fosroee] Eouty: END END SECTION|SECTION| MONTH KW SECTION/SECTION/SECTION! 1 6 1 8 9 10 BC3 SOO 2 70d Ol aloe 120 BC2 500 | _15.7| 0 0 0 BC2 500 | 65.8] 0 210 | 210 BCl 121| 53 210 | 237 t Sub | 500 {143} 263 ummary rbial cpnsumeis @ 540 kwh/no. Peas ABC5 111] 90 0 45 | 156 6 3_ | 1.39 0.3 2.6 ABCS STO 0 0 Or81.0 6 3. Pago Os1 0.2 ABC3 253] 47 90 | 114) | 367 2 Ut3 feo 0.1 1.0 ABC3 15.7| 284 FO 1212) 1228 2 3 $339 0.4 ZA ABC2 272] 0 49 491 | 763 2 3 dag 0.2 4.0 ABC2 37.5120 — 0: 17.1 6 v_ | 1.39 0.2 0.4 ABC2 Qo Ob. 27.3 6 Vv [N39 OUT 0.3 ABC] 309] 0 49 491 | 800 2 3 Pgse 0.6 12.5 t Sub 329] 4 820 ammary 208 residentjal and smal} commprcial]| consumers @ [500 kwh/mo. _2 large commercial |@ 105 |& 53 kw; 19]small |comme: 1 Hospital @/35 kw4 1 scHool @ 25 kw} 1 lilrary ial _@ approx 19 kw each; & FORM 2390 REY 3-57 -¢oo- Page 2 of 2 SYSTEM DESIGN 500 kwh/ni,/cons. DATE October 1977 SYSTEM DESIGNATION Corcova Public Utilities SYSTEM ENGINEER Marks Engineering SUBSTATION Main cIRCUITS 3ABC & 4ABC U. $. DEPARTMENT OF AGRICULTURE RURAL ELECTRIFICATION ADMINISTRATION VOLTAGE DROP SHEET A Eno VOLTAGE SECTION CONSUMERS CONCENTRATED ROP : € & voutace|“ENGTH DRO! WITHIN |BEYONO] EQuiv.| KWH WITHIN |BEYOND] Equiv. jOURCE THIS THIS THIS PER PEAK THIS THIS THIS DROP becTIO ENO SECTION|SECTION|SECTION| MONTH| KW = |SECTION|SECTION|SECTION 5 FACTOR | IN MI. 500 | 25.2] 430 500 | 19.6} 115 22 121] 195 Len 32.9 0 96.7| 50 304} 30 isis 404 1545 nall dommerftial cdnsumers @ 5 d 180, 420, 100, 100), 60, 4 small a 1 @ approx. oti @ 5p kw. sae 3 |lift station @ 30]kw; school @ a2 kw 34.8 oe me 34.8 6 Vv 5.7 _|4AB5 { Ye¥t:) 119 6 3 1,391 54.9 5.3 |4ABC3 BC2 500 60.8 “ 60.8 6 Vv 1.39/109.8 4.6 |4AC4 BCI 123] 500 | 204] 2 35 300 | 6 | 3 [1.39] 54.9 3.3 [4ABC2 Sub 500 207 106 313 4ABC1 mmary : all commer¢ial cdnsumers @ 50D kwh/mo. bas gp comm¢rcial |@ 53 § 32 kw; oe St tal fo statijon @ 2) kw 500 | 940 | 2405 ee: | [ FORM 239 «REV 3-57 -~o- PROPOSED SYSTEM WITH ORCA EXTENSION SYSTEM DESIGNATION Proposed SUBSTATION SYSTEM DESIGN U. 8. DEPARTMENT OF AGRICULTURE nURAL SVERTAIRICATION ADMINISTRATION Cordova Public Utilities New Main 500 kwh/mo./cons. SYSTEM ENGINEER ciRCcUITS DATE VOLTAGE DROP SHEET Marks Engineering ABC, 2ABC & 3ABC October 1977 SECTION CONSUMERS CONCENTRATED SONDUCT. LENGTH DROP WITHIN ul K TOTAL Jor size roars OF oe sounce A-OAD THis, | rms | rais|| perm | peak wt ns. eons Kw cu. ba DROP KsecTION wes END ENO SECTION|SECTIONISECTION) MONTH Kw mae | SECTION/SECTION Equiv. FACTOR IN Mi. 1 2 M4 15 16 17 BCl ABC2 7.2 +828 | 1.8 675 t Sub ummary:| 2 larg 3 4 5 6 1 10 ll 12 0 0 0 0 0 rae a 375 | 375 2 0 0 450 450 commdrcial consumers @/300 &1150 kw (Orcal exten$ion) | : 4BC13 | 2ABC14 24 oO; 12 {| 500 27 210.-[ 200: | 237 2 > ahve ~818 | 7.2 | 1706 2 A ABC12 | 2ABC13 19 24 | 34 | 500 66 210 a8 | 276 2 3 14.2.) .966°) 3,1 856 +9 |2ABC13 4BC12 | 2C15 10 1 6 | 500 16 0 Oo 16 CT EE a 13 »2 {2C15 ABC5S 2ABC12 28 54 | 68 | 500 | 121 - 210 | 225 | 346 AS Stee 0.2 69 «1 }2ABC12 ABC5 2ABC11 0 3 500 7 yas 0 11 18 2 3 Ae2 0.1 2 20 \BC4 2ABC5 87 | 139 [500 | 229 SO.) Gn 276: |). 505 2 5 ime 0.7 354 +0 \BC4 2ABC10 0} 60 | 500 | 108 85 0 43 | 151 2 3 thee 0.6 91 8 \BC7 2ABC9 7} 14 | 500 31 0 0 0 31 2 3 tee 0.1 3 4 \BC7 2ABC8 0 1 { 500 3 47 0 24 27 2 7 tae 0.1 3 a \BC3 2ABC7 22.4.8) <VS00.4) lek 90 AE 92 | 293t44 2 a tee 0.3 70 4 \BC3 2ABC6 1 6 | 500 16 0 60 60 Tora 2 a ive 0.4 30 aa \BC2 2ABC4 310 | 328} 500 | 496 99: Ah 376" |G426: | 922 1s 22 3 ivi 1.4 369 ae \BC2 2ABC3 131i. 353 251 55 197 | 225 | 476 a 5 itue Dial 48 +3 \BC1 2ABC2 503 514 766 0 727 727 _|1493 1 3 752 . 1 Re) 1941 23 : Sub ee S25 dat ee 778 727 1505 | mmar: al_an commercial |consuners @ 600 kwh/mo. a d B2 kw; |hospitlal & lfibrary|@ 47 kw; 1 qchooll @ 32 kw; 2|well pumps @|30 kw ; FAA and airport compllex @ 2|10 kw:|28 small conmerciial @|approx} 7.6 kw each \BC2 a 430 215 Tie 349. |c a57 \BC1 1225 1043 at h742 2065 Sub = 1903 wm 5 commércial|consuners @ 600 kwh/mo. 10 Larke_cond e commercial] @ 300, 200) 180, |120 100 60, 63 & 34 kw;|} 1 School @ $2 kw;|1 lift |station @ 34 1_sewape — t @ 50 kw: 15 small co nr Ox. 2 “ each. tal f = 677 500 | 940 | 2832 | 3772 -——} =} : w ' FORM 239 0 0@Ev 3-57 uw U. 5. DEPARTMENT OF AGRICULTURE RURAL ELECTRIFICATION ADMINISTRATION VOLTAGE DROP SHEET PROPOSED SYSTEM WITH ORCA EXTENSION (1980 LOADING) SUBSTATION New Main cIRCUITS ABC, 2ABC & 3ABC SYSTEM DESIGNATION Proposed Cordova Public Utilities SVSTEM ENGINEER Marks Engineering SYSTEM DESIGN 550 kwh/mo,/cons, DATE October 1977 Load LINE VOLTAGE SECTION CONSUMERS CONCENTRATED ay | Le DROP iE WITHIN |BEYOND| EQuiv KWH WITHIN |BEYOND] EQuiv Reg ona ie oe a SOURCE Loan THIS THIS THis | Per | PEAK THis | THIS THIS” kw cu. ROP ecto mices | THIS POINT Pa END ENO SECTION|SECTION/SECTIO MONTH Kw SECTION/SECTION|SECTION EQuiv FACTOR IN Mi. SECTION | 1 2 3 4 5 6 1 9 10 tt 12 3 | | 17 18 20 ABC1 ABC2 0 0 0 04 o 150 350-17:375 | 2379 1:1) 2 3 ER | .828 a 675 0.6 |0.6 |ABC2 At Sub 0 0 | 450 450 | | | | ABC1 Summary:| 2 largp comm@¢rcial |consunjers @| 300 &|150 kw (Orca}l Extenbion) | | | | | 2anc13 | 2aBc14 | __ 28 | 34 Ge eeoton ain. | age. [sibat hi spe 2el e.e0es| 7 28a 57e 1A 2ABC14 2ABC12 22 81 0. f 210715 210 | 1 299:]::1\2 ee ee a 2ABC13 2ABC12 2C15 Lf 19 0 0 0 19] 4 Ws 7s 2h 6a 0.8 15 O21 ACLS | 2ABC5 2ABC12 148 30 2107} 1225 4. '373 ya So aeae, -966 | 0.2 75 0.1 2ABC12 2ABC5 | 2ABC11 (Oe oo) TEREER BAK 2 2] .966| 0 s ABCLL 2ABC4 2ABC5 279 30 261 { 276 | 555 2 Se BT a2 +9607) :0.7 389 0.4/2.5 [2ABC5 2ABC4 2ABC10 133 Bete 0 43 | 176 2 a: Pee -828 | 0.6 105 0.2 [2.0 |2ABC10 2ABC7 2ABC9 36 0 0 0 36 2 . eh) -966 | 0.1 4 - | 1.7 [2ABC9 2ABC7 2ABC8 3 47 0 24 27 2 3 Tne -966 O.7 3 - Ry _|2ABCB 2ABC3 2ABC7 rat 90 47 92 | 263 2 3 Pia tie Been | Oss 79 0.1 {1.7 |[2ABC7 2ABC3 2ABC6 17 0 60 60 77 2 SET 2a 96ee| Oe 31 - [1.6 |2ABC6 2ABC2 2 ABC. 629 _99 376 | 426 {1055 | 2 3 R752 966: 0.4 422 0.4/1.9 [2aBc4 2ABC2 303 55 197 225 528 2 J 229661001 33 0.1] 1.6 |2ABC3 2AB 943 0 727 727 | 1670 1 72 -671 2 2371 13) 1.5 22ABC2 At Sub 962 727 1689 | a) ee es [Dab ‘I | consume s_ @ QO kwh/mo. 32 | hospiltal and librhr 7_kw: Jone schoo} at 32|kw; 2|well pimps at! 30 kw each; nd _firpor lex @ 2/10 kw:| 28 smh1l commerclial @| approx} 7.6 kw each f 27351 a 80 Oj} 215 | 488 2 3; bese -966 | 3.9 | 1903 1.8 | 3ABC3 StS fhe s 430 | 1043 | 1356 i 3 ey SOLE 1.6 2170 153: | ds | SABC2 ga3 1655 1968 | 3ABC1 180 rebidentjal and small) commprcial|consuners @ [550 kwh/mo. | | 10 large compercia] @ 304, 400) 180,{120 6, 100, 100, 60, 53 & 3Q kw;} 1 school at}82 kw | lift station]@ 30 Kw; 1 gewage}] plant|@ 50 Kw; 15 |small fommerfial @ sabe 16.2 kw each. | 2 Total a Sub ALE 550 — 2832 | 4080 IL | : od a i es. HEA FORM 239 atv 3-57 CONSTRUCTION PROGRAM CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197.7=19'79 CONSTRUCTION PROGRAM INTERIM POWER GENERATION Interim power generating diesel unit(s) are to be procured immediately on an emergency basis to allow C.P.U. to have firm generating capacity capable of meeting the 3,100 KW peak demand projected for this coming winter of 1977-1978. The diesel unit(s) should be skid mounted and capable of generating a minimum of 1500 KW on a continuous basis. The units would be placed in the existing Eyak Power Plant and would serve as back up generation when the existing units 1 and 2 are relocated to the proposed new plant site during - the latter part of 1976: COST ESTIMATE 1500 KW Skid Mounted Diesel Generator §& Equipment $ 150,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 19:77-1979 CONSTRUCTION PROGRAM EYAK POWER PLANT AND SUBSTATION RELOCATION The existing power plant and substation would be relocated to another site far removed from Eyak Lake and residential areas and preferably, close to waste heat utilization loads. A new site would be prepared and new buldings would be constructed by mid 1978 to house the diesel generators, offices and warehouse facilities. The 1978 and 1979 diesel generator additions, Units 3 and 4, would be installed at the new site and existing diesel generators 1 and 2 would be relocated to the new site during the latter half of 1978. The new substation would consist of two (2) new 5 MVA, 4160-12470 volts main power transformers, 15 KV tube bus, and oil filled transformer and feeder circuit breakers. COST ESTIMATE Plant Relocation and new facilities 2,400,000 Diesel generator Unit 3, used, 2650 KW 1,000,000 Diesel generator Unit 4, new, 3500 KW 1,750,000 Substation relocation 5,450,000 240s CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN HOV = 297.9) CONSTRUCTION PROGRAM NEW MAIN POWER FEEDERS Two (2) new main power feeders, 39, 15 KV, URD, 2/0 would originate at the proposed new plant site North of the City Dock. One feeder would serve the concentrated cannery loads and the second feeder would serve residential and commercial loads. The existing 5,000 KVA, 2,400-12,470 volt transformer at the existing substation would be utilized to feed 2,400 volt loads until conversion work is completed. COST ESTIMATE 3.0 miles of 2/0 URD Feeder and Utiliduct $ 300,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197-7=19:79 CONSTRUCTION PROGRAM NEW ORCA FEEDER Five (5) alternate methods of supplying power to the New England Cannery at Orca and the Cordova Dock and Holding Co. have been considered: A new, 2,5 mile, 3% submarine cable from the present City Dock to Orca with intermiediate shore splice points would be installed in Orca Intet. The cable would be subject to damage from silt and rock movements, tide action, and future rockfill developments and extensions. This alternate is not recommended because of its high cost and the high potential for damage. A new 3.0 mile, 3@ overhead line from the City Ski Lift area across Tripod Hill and Mt. Eyak to Orca would be constructed. 8 =A4 Ao CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN LOTT L979 CONSTRUCTION PROGRAM Access to the line crossing the two mountains would be difficult during summer months and impossible during winter months. The line would be subjected to heavy snow and wind loads during the winter season. This alternate is not recommended. A new. 2.5 mile, 38 overhead line from the City Dock would be constructed to Orca via the narrow road carved from the steep sides of Mt. Eyak and bordered by Orca Inlet. It would not be practical to construct the line along the narrow roadway since the road borders the high, steep sides of Mt. Eyak. The line would also be subject to heavy ice and high wind loads during the winter season. This alternate is not recommended. 6 As CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 CONSTRUCTION PROGRAM A new, 2.5 mile, 3% URD feeder and utiliduct would be installed on the inside shoulder of the rock and gravel road to Orca. The 18"x12"x4" thick concrete utiliduct would be precast in 12' sections and the top of the utiliduct would be 12" below grade. However, the cost of installed concrete utiliduct in Cordova is prohibitive. This alternate is not recommended. A new 1.2 mile, 3@ URD feeder direct buried in a sand bed at a 30" depth on the inside shoulder of road to Orca would be installed from the proposed new plant site. This alternate is the most reliable and economic method to supply power to the new loads. This alternate is recommended. COST ESTIMATE 1.2 miles URD feeder, direct buried $ 100,000 8 CAPA CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 CONSTRUCTION PROGRAM FEEDER NO.2 Feeder No.2, a 2,400 volt overhead feeder with high voltage drops would be converted to a 12,470 volt URD feeder, approximately 3.0 miles in total length. Shallow, concrete utiliducts would be installed in alleyways and streets to serve consumers in the central core town area along first, second, and third avenues. The utiliduct would be capable of carrying power, telephone, and TV cables. COST ESTIMATE 3.0 miles URD Feeder and Utiliduct $ 360,000 FEEDER NO.4 Feeder No.4, a 2,400 volt overhead feeder would be converted to a 12,470 volt URD feeder, approximately 1.0 mile in length. Approximately 0.5 mile of URD cable is now installed in utiliduct along Lake Avenue. COST ESTIMATE 1.0 mile URD Feeder $--120'-000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 197.7-1979 CONSTRUCTION PROGRAM DOCK FEEDER CONVERSION The existing 0.4 mile, 30, 12,470 volt feeder serving the canneries at the dock area would be installed underground to prevent further outages caused by seagulls short circuiting the lines. COST ESTIMATE 0.4 mile URD 15 KV Conversion THREE MILE BAY FEEDER COMPLETION A 3.0 mile, 34, 15 KV, overhead line extension would be added to the existing line to complete the feeder at Pt. Whitshed. COST ESTIMATE 3.0 mile 15 KV Feeder extension CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN LOTIALS7 9 CONSTRUCTION PROGRAM F.A.A. FEEDER CONVERSION The existing 3.0 mile, 2400 volt F.A.A. Feeder would be converted to a 12,470 volt overhead feeder to serve the new airport and F.A.A. facilities. COST ESTIMATE 3.0 mile 15 KV overhead conversion F.A.A. FEEDER EXTENSION A new, 3.0 mile, 12,470 volt, 30, overhead feeder would be installed to serve the new, proposed F.A.A. Radar Site near the airport. COST ESTIMATE New 3.0 mile 15 KV overhead line $ 90,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 4197-71979 CONSTRUCTION PROGRAM POWER CREEK HYDROELECTRIC PLANT The construction of an access road, geologic surveys, core drtidings: site investigations, preliminary engineering, and FPC licensing application would be conducted during 1978 and 1979 to develop an initial 5,000 KW run of river hydroelectric plant at Power Creek. COST ESTIMATE Access Road, Surveys, Licensing, Engineering $ 470,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-49179 CONSTRUCTION PROGRAM POWER CREEK MAIN FEEDER A 15 KV, 30, 2/0, URD Main Feeder approximately seven (7) miles in length would be installed in Eyak Lake from the mouth of Power Creek to Cordova. The proposed 10,000 KW run of river plant would supply power to Cordova during summer and autumn months. COST ESTIMATE 7.0 mile Power Creek Feeder $ 600,000 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN LOT TOT 9 CONSTRUCTION PROGRAM NEW RESIDENTIAL SERVICE COST 50 KVA pad mounted transformer Service wire Labor § Equipment No. of consumers served Cost per residential consumer NEW COMMERCIAL SERVICE COST 39 100 KVA pad mounted transformer Service wire Labor and Equipment No. of consumers served Cost per commercial consumer LARGE POWER SERVICE COST 39 500 KVA pad mounted transformer Service wire Labor §& Equipment CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 CONSTRUCTION PROGRAM The following new services have been projected by the 1977 Power Requirements Study: SERVICES Residential 1978-1981 $ 150,000 Commercial 1978-1981 30,000 Large Power 1978-1981 30,000 Residential 1982-1987 275,000 Commercial 1982-1987 45,000 Large Power 1982-1987 60,000 C.P.U. cost records for the installation of new services in Cordova are not available at this time. The cost estimates above were determined assuming $600 per residential service in 1978, $1000 per commercial service in 1978, and $10,000 per large power service in 1978. Construction costs were escalated at 10% per year based on the assumed 1978 costs to determine new service costs in 1982. SERVICE STANDARDS AND POWER CONSUMPTION CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-1979 SERVICE STANDARDS AND POWER CONSUMPTION Upon completion of construction of the facilities proposed herein, the system will provide adequate and dependable service as follows: Eight hundred eighty (880) residential consumers using 600 kwh per consumer per month by 1981. Two hundred fifty five (255) commercial consumers using i,700 kwh per consumer per month by 1981. Seven (7) large power loads which are to be provided for on an individual basis by 1981, EXHIBITS CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 1977-2979: PROPOSED GENERATION SYSTEM : Gtat)--ciug) “_ a! oe _ 3 T 4 joctoe 12,470 V,.1200-A ) ) ) ) ey i160" 12470 4160-12470 Ss : 2000 A lili 5 UNIT 7 UNIT 1 UNIT 2 UNITS UNIT 4 UNIT 5 UNIT 6 TURBINE DIESEL DIESEL DIESEL DIESEL HYDRO HYDRO RECOVERY POWER CREEK 4000 KW 1950 KW 2650 KW 2650 KW 3500 KW 5000 KW 5000 KW 1987 Cxast: exist, 1978 1979 1982 1987 NOTE: Power Creek Units 5 and 6 are run of river units. RESIDENTIAL RESIDENTIAL COMMERCIAL COMMERCIAL LARGE POWER LARGE POWER RESIDENTIAL COMMERCIAL LARGE POWER CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN Ivete 17S AVERAGE NUMBER OF CONSUMERS DATA 1976 1981 240 640 20 CORDOVA PUBLIC UTILITIES TWO YEAR WORK PLAN 19:.77-19:79 NUMBER OF CONSUMERS AND DEMAND The recent power requirements study for Cordova, Alaska indicated the following ACT and NON ACT consumers and power demands: No. consumers 1976 1981 ACT 134 18.4% 264 NON ACT 4721-81-64 878 TOTAL 861 1142 Power Demand ACT KW 15.8% 1125 KW 27.6% 1885 KW 31.6% NON ACT KW 84.2% 2950 KW 72.4% 4080 KW 68.4% TOTAL KW 4075 KW His redics PARTAENT OF THE LHTERION POWER CREEK NEAR CORDOVA, ALASKA sorte aal cy es ; Febees’ sREEK aa | 5 6 Gordove Pultic Urilities 1977 POWER COST STUDY 12,500 KW — 30 10 80 GWH/ Ye. zbuszdh YAK LAKE DAM SITE (0m 27 SHEET) ‘Scat 1 $6000 1 ch = #00 fat ry ° 05 he ‘osc ase mene a (Corto terval on and 20 teat Centusstaral on ones aoce 5 est Datum sn ban ovat F aheet wh dam we and pte ‘i cons (X) ave plane able bench smaska except hone mashed BM POWER CREEK. f i fas Pon 38 ONE SHEET -1S- | | ‘ i | { ! thn Biren cael eh | . TSK, 12O{2OBN MILE et 4 STATION SVC kA00 3 124 Toy Teed —>-- SMA Ct) RESOKW 1000 Kw OUT OF TSO KW CEO KH e& SERVICE SINGLE LINE CORDOVA, ALASKA POWER PLANT ie SUE TT] LAKE Kok, 3 Le BAY 00 KVA C66 KYA) a, 18K A (éKkvb 124 10/ 1200 {3 ALE a. TOWN FEEDER /080 KYA 150 KWVA (260 KNA) CSKVA) 2520 WA (83KY AxsA se a e SS nee as 12410) 1200 G4L KVR tls * * NOT MEASURED “DEFERENCE BETWEEN GENERATOR AND OTHER LORDS. | (XXX) FEEDER UNBALANCE we D © ZE50KW /OOCOKW OUT OF 750 KW 50 Kw 1750 WN SERVICE POWER PLANT LOADS , oO Oo SUE 24,1977 a CORDOVA PUBLIC UTILITIES POWER GENERATION DEPARTMEN October 3, 1977 TOs General Manager SUBJECT: Monthly Report, September LOAD: Total generation was 1,13),2h0 KWH compared to 1,173,960 KWH last month and 1,059,480 KWH this month a year ago. This is an increase of 0.87% from last month and an increase of 11.77% from this month a year ago. The indicated peak was 2570 XW this month compared to 2500 KW last month and 2275 XW this month a year ago. This is an increase of 2.8% from last month and an increase of 12.96% from this month a year ago. Total generation for the first nine months of 1977 was 10,799,620 KWH compared to 10,328,280 “iH during the same period last year; this is an increase of 4.56% FUEL AND LUBE DATA: No. 2 Fuel Oil Used Svecific Fuel Consumption Lube Used “ Sed 88,35 Gal 13.40 XWH/lal 1395 Gal ** Oil changed in Unit No. 1 ENTERPRISE LUSE OLL CONSUMPTION DATA: Unit Wo. 1 Oil and filters were changed on September 26th completing the oil cycle which began on July 8th. Total hours on oil was 1274:15. First set of filters were used 597 Ers 15 Min; the second set was used 676 Hrs 30 Min. Initial charge of oil 660 Gal KWH Generation End 267k Oil added during cycle 385 Gal Start 2168 Total Oil expended LOLS Gal “506 x3200 1,619,200 «7H 10h5 Gal at $ 1.92/cal = 3 2006.L0 28 Oil filters at $13.90/Each $ 389.20 Total 3 2395.60 3 2395.60 ‘ : ‘ z —“T5515,200 man? eOOLL8/M7H or 1.13 milis/<WH 1,619,200 SwH | HP REO 2170,509 HP.uR 2,170,509 HP.HR ea a if 305 cal 5637 eee BOs SUBJECT: Monthly Report, Seotember Octcber 3, 1977 Unit No. 2 Overation of this unit was limited during the month because of high lube oil consumption and high copper in lube oil samples. 229 Gal Oil at $1.92/cal = $ 1.22.h0 KWH Generation End 3885 Start 3838 uz xl:120 193,640 ii $ 22.0 “53-00 ERC‘ TS? -00218/KVH or 2.18 mills/KiH 290 5ST AH 259,571 3a 220 Gal Unit No. 10 (GMC Due to increased operating hours imposed on this unit, with No. 21 emergency service, sufficient data has become available to establish a lube oil consumption rate, 275 Gal Oil at $ 1.92/cGal = § 528.00 AWH Generation En be Ses {wc NON ONC YOVMwWHo COLO r}o. a if c be mm X . 3 528.0 Sos 5 ,0027/KH or 2.7 milis/KWH 9200 Kut 195,206 SH = 261,562 SPER 261,562 BPR Loca zp up 275 GaL , oie Cay e~ Hartman ce BLLo TLS At ot uit vol ea sec cath QCctover 3, 1977 we Jeneral Manaver erm, - SU2sTOTs Veekly Lerort ta a u a Q i i) . ' “diame aeneration vas 2h, 060 Total KWH compared to 263,0C0 last waek, a Szerease of 3,203, Tho naxicun caily generation was 38,400 Kw comaaured to 235.7C “a dast week, a decrease of 12.1274. fhe indicated peak cnia week was 2035, emeared to 2245 K4 last week, a cacrease of 7.12%. NIT SUTAGS alD RELAY OFERATIONs 23 at Midnight Unit No. 7 out of service for repair. “Sep 29 at 11:40 an Liner Fuals, pic ston wes cyliacer | to Thursday Saat injectic replaceteat ni gates operation of she unit ay Sep 25 at 7:30 an. Unit Ne. 8 out of service with cofsctive a = ta Pars suay Sep 29th at 93:CO pn water pump. cum wag removed, shart slceve Yeniacec and packing reneweca. Test opnration 2 the unit was satisfactory. a3 e 1 out of service “or at 9:00 pr Late oil and filters changed, rex exciter orushes, and doiled cus water heat exchanger. day Sep 25 a et “Duenday Se m Unit No. 1 out of service to clean Lube oil 7 pressure strainer. 64> CORDOVA PUBLIC UTILITIES POWER GENERATION DEDERDEN September 26, 1977 TO: General SUBJECT: Status of Engine Generator Sets Unit No. 1 Unit out of service for maintenance, oil and.filter change, replacement of exciter brushes and boiling out tne jacket water heat exchanger. Unit No. 7 Not operable, the seer has a defective piston and or cylinder liner w umos oil, Removal of the cylinder head revealed the unit has deen run excessivel ly hot in the t; the elevated temperatures damaged the cylinder head Ring seals. Unit-No.-8 Unit is op peraving, continuing to have difficulty with water pump packing due to a galled impeller shaft. Metallic particles from a blower or pisto: re found in the air box. Accumulation of these particles doesn't seem rapid enough to sugzest a catastrophic failure is lik oO o Ho Sq . Unit No. 10 Lube oil analysis revealed high content of copper, iron and chromium. Unit has an extremely high oil consumption rate. Unit must be scheduled out of service to permit checking th connecting rod bearings and inspecting the liners and piston for obvicus signs of trouble. 8 Fa Unit No. 2 Remains in standby service (operating todsy)scheduled 7 ed for overhaul as soon as of ther generators are restored to a condition which will permit maintaining service without Unit No. 2. Hartman -65- CORDOVA PUBLIC UTILITICS POWER GENERATION SEPARTMENT Septemoer 26, 1977 General Manager SURJNCT: veekly Report naptemcer, LOAD: total plant generation was 263,CCO S/H compared to 273,500 KWH last week, a z3 of 2,015. The maximum daily generation was 43,700 SiH eanpared tw (cH Last week an increase of 5.0L. The indicateac seak this week sas 22k5 Si compared to 2390 Ki last week, a cecrease of 5.67%. SNIT OUTAGS AND RELAY CPERATICNs “encay Sep 19 at 9:30 am Unit No. 2 cut of service for water pump to sednesday Sep 21 at 7:15: mm repairs and water test fo cylincer head gasket leaks. “piday 3e. 23 at $230 om Unit No. 7 cut of service with a orcdlen to Saturday Sep 2h.at Nicnignt causing tha No. 9 cylinder to pump«oils, Tear down of the unit to identity provls is in progress. ; saya tam a LOADS SUAVEYs ht recording ammeters were connected to Ssecera in the suostation on Saturday the 2 the Two voltage and one pewer recorder were also connected in the electrical switchboard of Unit No. 2. Current data on tne sucstation f2ecers will be recorded 2a hd-72 hours, the next step will be “he ttermination of voltae crop on feeders, -66- SOyk 2§ILIg UTILttis aA SIDE Ui seed ced PCATR GENS TI DEPARTMENP? September 19, 1977 iGs jeneral Manager ots “eekly Report The folicwing is a summary of power plant operations for tine week of Liel7 eLe 329 %. The maximuz daily ; sempared to 2570 Ki last week, a de ree see Gio OUTAGE 64 93° Didste AHD wien jeneration was 272,500 «s# compared to 29, 085 x seneraticn was last work, a cacrease of 245s The indlcatse : bd 30 29- ore ase of 7. Jrtcay Sep 16 at 1300 an Unit Ko. 7 wit of service for a iude oi2 +o 73:00 am filver change. ine CLL ANALISISs call was received from the oil lab at iio Machinery on Seotemser llth regarding the oil samples sent to 7. Nde7y Oe 3 and Ho. 19. tio problem was noted with tne cya tr The. sample from Unit Ho. 7 revealad 26 Soy Copser, a follow sanp nd of an adcivional 260 hours of onvration. Th si mple Pa Fon, 0 FH Chrome, 17 2:2: Lead and 19 Pi cece red Dearing anc crankshart wsar and a Serene Rao Ping Zor analysis. velocing. 4 follow up samole from Unit 2. 10 1 mas oeen saiisc of 3.33%. CORDOVA PUBLIC UTILITY POWER GEMATION GEPARTHCLT someared to 2425 ka STO Armes = T) Cy iam Aad See AY OPER: ate 7 Seo 3 at 11:00 an day Sep 9tr at 5300 pm pe 3 v lant zeneration was 294,060 wil compared to 284,530 huH last week an The maximum SIH last week, an increace-of 2.47%. The indicate $ Mera us ily zeneration was lo,hc0 | eccmpared to peak tnis week was) - eek an increase of 5.95. Sontinued troubleshooting Unit io. 1 oy tracing and sxetching tno fuel oil. sysven. Prom this it was determined the el 311 return Line was dlocked, necessary valve changes were rade and ail Nel ofl filters changed, The Unit was started un ana put uncer load far test. Performed savisisctorily . excent for a bad fuel. cil leak on a fuel o12 gauze sensing line scal oct. The unit was. secured, the seal pot removed and retaireca and the unit returned to service. Unit iio 2 out of service cue lew turto lube oil pressure, 7 2 traced to a hole -crn in the gause se line. wefective tucing was cut out anc reolaced, Line fault on Mile 15 line caused Line recloser to open and stay off, Ling: en made necess*ry repairs. a68= ee WATICN DEF Septemoer 6, 1977 iw oving 1s a summary of power plant operations for the week of Aucust Septemoer 3, 1977. LOASs Total slaat generation was 234,530 KwH compared to 267,0C0 NWH last wesk, an increase of 5.26%. The maximum daily generation was 45,250 svH comvarea to 41,5090 HH last week, an increase cf 5.05%, The indicatec tais week was 2425 K¥ compared to 2300 K/ last week, an increase of 5.43%. UNI? CUTAGE AND RELAY OPERATION Friday Sen 20 at 92:10 an Unit No. 1 and No, 10 were on, Unit fic. 1 tesll:h5 an lost load, the oserator noted the exciter Grive belt slipoin; during the onset of this oreblem; an attempt was mace to iise connect the load feeders but the AC trip units failed to operate, the operater then began manually tripping the feeder breakers in the substation. On the reduction of load Unit No. 10 tripped on overspeed causing total loss of service. ixtensive delay and problers were encountered due to waitias ime for diesel starting air; cifficulty was also experienced transferring ths Liznt fuel o13 pumps fron Unit No. 1 to Unit No, 2 (tne heavy fuel oil pumps whieh normally supoly Lizht fuel oil to Unit No, 1 nad deen securec cue to excessive leakage from a seal pot on an ins*rument zauze line), Unit No, 2 was started, ran briefly wita the towm loads and shutdown on low control air pressure, This shutdown was caused by air leaking fron an air filterecryer at a rate greater than the compressor was capaole of replacing. The filter dryer was bypassed, Unit No. 2 started and all service restored at apnroximately 113h5 am. SUBJECT: ‘Veekl 4 oricay Sep 23 to Saturcay Se . az P uspert August 23 9:10 an 3 at Midnight 269= Septemoer 3, 1977 Septenver 5, 1977 Unit sio. 1 out of service for troublesnooting re revair. Meggered main generator ficla, it showed an infinite insulavion resistance to ground at 5CO volts. Checked exciter brushes and commutator; brushes are worn short cut were seating perfectly (no replacenents were in stock), excellent commutator film, no evidence of sparking. No exciter bearing proolem found, The exciter crive belt was worn excessively, rubber on face of vee's was cnecked and oroken. The drive belt was replaced with an old belt which was in vetter condition, this celt was aligned and properly tensioned. Sutensive effort was reauired to resolve a control air oroolen which prevented startup cr tne engine, replaced a 2208125 PSIG pressure regulator and unclogzed control air lines (this control air problem may have caused the unscheduled loss of the unit‘'at 9:10 am). The unit was started up Saturday evening and <laced under load, it ran well at 2508500 Li cut shutcow when load was increased to approximately d00 Ki, reverse sower relay overated and trirppec the generator oresker wnen wae eangine shutdown. Fuel oil was founc lea} trom the No. |; fuel injection pump, after this unscheduled snutdown, this plus we sautdown suzgests a fuel vroclen. Ss. », ww © o. Bag ‘ere mae eee 3 ey August 29, 1277 Jeneral “anager ‘CTs scekly Seport following is a summary of poxer plant operations for tne week of 21-27 \is2 tal clant generation was 267,500 AWH compared to 279,C2G Aad la REN, 2 creasn of 4.02%. The maximum caily generation was 41,5C0 “+H <ne same as st weck,. The indicated peak this week was 2300 hw comsarea to 2500 he lass ek, a cecreace of 3.05. GUTAJS AXD RELAY CPERATICH s unit wo. 2 held off administratively for evaluation of high leac am copper in Labe 3 Ma & os oil, ivailaole for emer: Unit No. 2 out of servica for reciaceent of main air starting valve anc trcudle- shooting of pneumatic contrel systcm Replaced AND=9 and valve ?=3, jar device interlock valve lgakec and was bypassed. A replacement ordered. SSeS sive Wale ’ mpresegion tests (175 RF¥) were completed on Unit Ho. 2 she arterncen of Pressure 390 PST 470 iST LSO SI MEO. INE n the following results: -70- -71- CORLSVA P se ad} gt Abies 1977 Ths General Jlanazer SUIJECT: Weekly i mt The following is a summary of power slant cperations for the v22k of 1i-20 AQLUST. LGAs lant generation was 279,020 avi ccompared to aul ocg nH Last week, an or 15. 77%. The maximum daily seneration was 41,000 sii conjared tu week was H last re an increase of 5.33%. The indicated peak t:.i compared to 2200 KW last week, an increase of 13.53%. \ND RELAY OPZRATION: % Midnizh Unit Ne. 2 held of? admin eerie for 30 at “Midnight evaluation of aish lead and copper in luce oil, Available for emergency ae Init No. 3 cut of service Zor re cylinder liner seals, piston rings cylinder neac gasket and seals on cyl Now Fe aan CORDOVA PUBLIC JTILITY POWER GENERATION DEPARTY ENT August 15, 1977 TOs General Manaser SUBJECT: Weekly Reoort The following is a summary of power plant operations for the week of 7=13 August. LOAD: Total plant generation was 241,000 KWH compared to 278,140 KuH last week, a decrease of 13.35%. The maximum daily generation was 39,120 K.-H compared to 45,500 K/H last week, a decrease of 14.21%, The indicated peak this week was 2200 Ki compared to 2500 KW last week, a decrease of 12%. UNIT OUTAGE ALD RELAY OPERATION: “ednesday Aug 10 at 1:00 pm Unit No. 2 out of service for a lube oil filcer to 6:55 pm changes; 15 micron filters were installed, a7 ol Yartman 393s CORLOVA PUBLIC UTILITY POWER GENERATION DEPART ENT August 8, 1977 TOs yeneral Manager SUBJECT: Weekly Report The following is a summary of power plant cperations for the week of 31 July- ©} August. LOAD s Total plant generation was 278,10 XwH compared to 313,080 KiH last week, a Gecrease cf 11.15%. The maximum daily generation was 45,500 KH compared to 47,580 KeH last week, a decrease of 1.36%. The incicatea peak this week was 2500 KW compared to 2650 KW last week, a decrease of 5.66%. casem A UNIT OUTASE AND RELAY OPERATION: Saturday July 31 at Midnizht Unit No. 7 not available; required one drum of to Friday Aug 5 at 8:00 pm SAE LO weight oil before operation. Since no LO weight oil was available from the Chevron Gealer the plants Limited supoly was reserved for the Enterprise engines. Tuesday Aug 2 at 3t30spm. Unit No. 2 out of service for a lube oil to 6°00 pm filter change. Wednesday Aug 3 at 8:00 am Unit No. 2 out of service for repacking heaa ic! to 1:30 pm on jacket cooling water heat exchanger (one ring of packing was added) shorter bonnet odclis were installed to eliminate an interference problem wnichn had prevented tightening the bolts fully. A leak on the lube oil cooler odonnet was corrected and valve cover zaskets on cylincers No. 1, 2, 3, 4 & 6 renewed. The generator circuit breaker and its cubicle were cleaned and inspected, Line overcurrent relays and reverse power relay tripping circuits were checked and tripping of the generator circuit breaker verified. Luring these checks it was determined that the instant- aneous overcurrent relay trip contact was not. connected, A jumper must be installed cetween terminals 1 & 2 on the rear of the relay case to place the instantaneous trip contact in the circuit oreaker trip circuit. — SURILCL: Weekly Report 31 July-5 August 1977 Thurscay Aug L at 8:00 am to 4:30 pm Fricay Aug 5 at 8:00 am to 6:00 pm Saturday Aug 6 at 7:00 pm to 103230 om Beek nard =, Hartman ower Plant Surerintencent FA August 3, 1277 Unit No. 3 out of service for replacexent of she cylinder head gasket and seals on the ic, 10 cylinder, Unit No. 2 shutdown during warmup cue < matic control problem. The aizficuit; to a defective control valve ?=3, in control sanel and to a defective air starsing rlock valve was valve. The barring device inv defective out was restored to serviceable condition by disassembly and cleaning. Vaive v=} was renewed; attempts to repair the air starting valve were unsuccessful. The engine was started oy ciscon- necting the si:mal line,for the air start val from the barring a: vice interlock vaive (the Line connection in the interiock val and applying 150 PSIG air from a stavion air outlet to the starting valve signal line. a new air start valve will be required. Unit No. 2 out of service for a lube cil filter change. Ns “VA PUBLIC UTILITY LRATION DEPARTS: August 1. 1977 TOs General Manager SUSJECT: Weekly Report The following is a summary of power plant operations Zor the week of 24-30 July. Loabs eae Total clant generation was 312,059 KWH compared to 329,760 KwH last cecrease of 5.0550 | The maximum Gaily generation was 47,530 Ku campuses 50,760 <wH last week, a decrease of 5.06%. The incicated peak this week was 2550 Ki compared to 2500 Kw last week, an increase cf 1.92 UNIT CUTAGE AND RELAY OPERATION: Tuescay July 25 at 9:45 om Unit No. 8 out of service wita a water pump to friday July 29 at 11339 an problem. Water pump was repaired and unit returned to service. Jacket water syscem was hycrostatically testec at 30 FSIS and leaks identified as follows: Cylinder No. 9 + has a liner leak into the airoox. Cylincers No. 5 & No. 10 have leaking head sasieis. Maintenance to correct these deficicncics will be scheculed. No. 7 was taken out of service due to oil dilution of the lube oil. Three injectors wers foind leaking anc ired. - OO Fe hr cr Sry ty Cc @ "9 om 4:33 pm A seagull caused a pnase to phase fault on the 12.47 KV feeder near the St. Elias cannery. The short circuit caused the ricic .. on the No. 2 generator to collapse and + : engine tripped on overspeed (12), there were no relay targets; Unit No. 10 trippea on overload. Station service was restored at approximately 4:33 pm and feeders energized at 5:00 pm after lineman had checkea he fault location and determined the Line was clear, Station Cutage - 5 minutes Feeders “27 minutes Saturday July 30 at 8:CO am to 5:30 pm : Sk Bernard 2, Hartman Power Plant Superintendent August 1, 1977 Unit No. 2 out of service for maintenance. Jacket water heat exchanger was cleaned, crankcase vacuum pump inlet screen cleaned and cover gasket renewed, repaired air leak on the No. 5 cylinder air inlet manifold, renewed valve cover zasket on on the No. 5 cylinder. Replaced crankcase cover gaskets on opposite control side of engine, recacked floating head on jacket water heat exchanger. CORDOVA PUBLIC UTILITY PCWER G: NERATION DEPARTMENT TOs general Manager SUULCT: Weekly Report The following is a summary of power plant operations for the week of 17-23 July. ~% generation was 329, fie 3 GA oO > eee 4 ‘) i compared to 2790 Ki last week, a decrease of 3.70%. ho UIT OUTAGE AND RELAY OPERATION Sesurday 16th at midnight to Friday 22nd at 1:30 om Dah ay, 2. Sernard E, dartman Power Plant Suverintendent 260 KH compared to 331,960 x: pie 0.562%. The maximum daily generation was 50,760 KWH compared to “Pk last week, a decrease of 1.22%. The indicated peak this week was 43 Unit No. 2 out of service with mechanical and electrical problems. Exciter. suppressor assemolies were received and installed Monaay evening, starve up of the unit revealed a leaking nead zasket on the No. 5 cylincer which was renewed on Tuesday. Following renewal. of the head gasket tae unit was started up and a problem with tae vel né regulator identified. Friday the 22nd a rnsostat was installed between the control power cavcery supply and the exciter field, unit built up voltage and secame available for emerzency use under manual voltage control. Bob Uryden of X.W. Retherford Associates, Anchersge, arrived to troudlesacot the regulaser. He quickly located a defective suppressor the regulator, CRell shown on Electric Proaucts Drawing No. D72029007h0. This supsressor is _ across the controlled [C exciter fiela suoply, - One of the Sarkes Tarzan ST-561-2 suppressors obtained as spares for the exciter was installed as a temporary replacement and the regulators, both auto and manual were returned to service, Unit was test operated and an air leak on % No. 5 cylinder head air intake manizola Zo this leak was repaired and tne unit returned to service, -78- ORDOVA PUBLIC UTILITY POWER GENERATION D? PARTMENT July 18, 1977 TO: General Manager SULJ.ST: Veekly Report The following is a summary of power plant operations far the week of 10-16 July. LOAD: ‘ - Total olant generation was 331,960 KH compared to 305,960 Kati last week, an increase of 3.504. The maximum daily generation was 53,900 KWH compared to 47,200 KWH last week, an increase of 12.25%. The indicated peak tnis week was 2789 Kui, the same as last week. T OJTAJE AND RELAY CPERATION: Sanday 10th at 12:00 o Unit No. 1 out of service with a fuel supply to “onday llth at 330. problem. Difficulty traced to an open valve which allowed the fuel to be returned to the = supply tank. “on zlth at 7:30 am Unit No. 7 lube oil diluted with fuel cil. to snesday 15th at 7:00 om Six fuel injection nozzles sere removed and seals replaced. Lube oil changed anc engine test operated with satisfactory results. tuesday 12th at 12:20 am Unit No. 2 shutdown during a system line fault and Unit No. 8 tripped causing loss of - all services. The suppressor assemblies on Unit No. 2 rotating brushless exciter were burned cut. Unit No. 2 Phase "C" instantaneous overcurrent relay (50) onerated but the generator breaker failed to trip; engine tripped on overspeed (12). Unit ic. © cn the , bus at 12:25 am restoring station service. : Unit No. 1 on at 12:l2, delay cue to cooling water and lube oil pump problems. 7200 volt town feeder closed at 1:05 pm. Lala oad - Feeder closed at 1:03 pm. 3 Mile Say Feeder Closed at 1:12 pm. Delay in picking uo feeders due to OCB closing procedure. Cperator as not aware that 0C3 control switch had to helu closed for 30 seconds for the closin; mechanism to actuate. Station Outage - 5 minutes 7200 Town Feeder = 45 minutes Lake Road Feeder - 3 minutes 3 Mile Bay 7eeder= 52 minutes -79- SUBJECT: Yeekly Report 10-16 Jul duly 13, 1977. MAINTENANCEs Firing pressure tests and “alancing of firing pressures was accomplished, No. 5 cylinder heac gaskets and seals renewec, Fuel injection pump ané governor linkaze cleaned anc acjustea, two fuel o.mo racks were sticking. \ir starting check valves were checkec ind air distrioutor removed for cleanings anc freeing of ccopet valves that were sticking. Uylincer Liners inspected for leaks, none were found. visconrecved Lisid leacs from exciter and meggerea zererator field, 50-150 megohms fron windings to ground. Unit remains out of service cue to need for suppreesor assermolies for the rain generator Jicid. The suppressor assembly is Sarkes Tarzan No. S-56l-3, available from ST Semicon Inc., 3leomington, Inuiana. JUnit No. 8 Gcvernor reported not to resncond to lower si; checked no orobdlem found. . Hartran nt Superintenden+ General Manager 280 CORDOVA PUBLIC UTILITY POWER GENERATION DEP. RIMENT July 11, 1977 The following is a summary of power plant operations for tne week of 3-9 Jul;. LOAD: Total plant generation was 305,960 KvH compared to 301,320 KwH last week, an increase of 1.37%. The maximum daily generation was 47,200 KiH compared %o 5,560 KWH last week, an increase of 3.32%. The indicated ceak this week was 2709 KN compared to 2650 Xi st week, an increase of 1,88,. tiie UIT OUTAGE AND RILAY OPERATION: Sunday 3rd at 2:00 am to Saturday 9th at 6:36 pm funday 3ra at 10:00 om to 9:00 mm OTHER PLANT PROBLEMS: Unit No. 1 out of service with cracked cylinder head, number 6 cylinder, itebuilt head with valve guides was obtained from leLaval in Cakland, nead was built up in plant for installation, Unit No. 10 out of service, water in engine air cox. Possible water contamination of lube oil. Approximately 10 gallons of water was puinved from lube cil sump tank. Renewed jaskets on air tox and crankcase handhole covers. Unit was satisfactorily test operated. Unit Noe 1 secured for lube oil filter chanze and cleaning of lube oil pressure strainer, Oil strainer support insice housing was damaged, the necessary repairs were made oy the operators. Unit No. 1 has several ninor water leaks which must be repaired, Unit No. 2 needs to have work done on the fuel injection system to balance eylinder loading, make compensating adjustments on the governor, renew the cylinder head gaskets and seals on the No. 5 cylinder, repair oil and water leaks cn the jacket water and lube oil coolers; clean ali heat exchangers to inorove 2fficiency of the cooling system. Unit cavaoility is currently Linited to approximately 2200 KW due to rise in temperature or cutlet oil. SUBJECT: 'Yeekly Report 3-9 July Jue Lore Plant cleanup continues, some money will te re-2 empty oil drums, each drum reauired a 315 deposi account when the drum is returned. ‘ned by returning unnecessary % which can be credited to the Bernard ©. ‘artman Power Plant Superintendent 90°. CORDOVA PUBLIC UTILITY POWER GENERATION DEPARTMENT July 8, 1977 TOs General Manager SUBJECT: Protective Relays The power plant has sustained total interruption of service twice since June 19 as a result of electrical faults on the transmission lines. During these faults no plant protective relay functioned to disconnect the faulted feeder or the generators. Generators have stayed connected to the faulted line until prime movers shutdown, apparently due to the generator field collapsing or voltage being lowerec to levels that cause controllers for the diesel engine auxiliary ecuipment to drop out. Incidents of this type cause unnecessary interruption of service, may damage generator windings by overheating and cause thermal anc mechanical shock to the ciesel engines. An effort must be ~ade to resolve this problem and develop a selective trip system, this would insure that only the faulted feeder is disconnected. The generator relays would operate as tackup or on faults near the generator. A brief survey of the plant relays has revealed the following problem areas. (1) No fault current or protective devices coordination stucy. (2) No drawings of current transformer amd relay wiring. (3) No drawings of circuit breaker control. (i) Feeder relays and treaker control are not identified such that they can be keved to a breaker location in the substation. (5) Feeder OCB's are 230 volt 60 Hz trip and close. (5) Feeders have 2 CT's on the load side of the OC5-most common overcurrent relay arrangements use 3 CT's. (7) Three feeders have no relays Mile l?-rAs-has recloser on line some cistance from the plant. (b) Local transformer banks are fused (2 feeders). (8) 12 KV transformer has no protection-breakers and relays or fuses. (9) 12 KV wye has no ground relay. (10) Generators have no differential relays. (11) Generators 7, 8, 9, 10 have no overcurrent relays; OC3B's for these units have series overcurrent trips. -83- SUBJECT: Protective Relays July 8, 1977 Recommend a high priority be given to resolving the difficulty with relays on on the feeders, Since the reverse power relays on the generators function it is likely the overcurrent relays can be put in working order by some simple adjust— ments. I do not recommend installation of any new overcurrent relays at this time. A tabulation of plant overcurrent relays with present setting is attached also a single line diagram. Kp ee Bermard E, Eartmm Power Plant Superintendent -84- ORDOVA POWER PLANT OVERCURRENT REIAY DATA Feeder No. 1 Westinghouse C0-3° Tap Range 2-6 A Instantaneous 10-0 A Instructions 1-101 SET Tap 5A Dial 5 Inst. LOA CT Ratio 00:5 (2) Feeder No. 2 Westinzhouse CO0-8 Tap Range 0.5=2.5 A No Instantaneous Instructions 41-101 Ser Tap 0.5 A Dial 5 CT Ratio 00:5 (2) Feeder No. 3 Westinghouse CO-3 Tap Range 2-6 A Instantaneous 10-0 Instructions 1-101 SET. Tap SA Dial 10 Inst. LOA CT Ratio 00:5 (2) Generator No. 1 house CO-3 e 2e5 4 T Ratio 800:5 (3) Generator lio. 2 Westinghouse Cov-8 Tap Range 2-6 A Instantaneous 10-0 A Voltage 120 Instructions L1-115 eer Tap 5A Dial & Inst. 15 A CT Ratio Unknown -85- CORDOVA PUBLIC UTILITY POWER GENERATION DEragT: DT TOs General Manager SUBJECT: Weekly Report duly 5, 1977 The following is a summary of power plant operations for the week of 25 June - 2 July. LOAD: Total plant generation was 301,320 KH compared to 290, 020 KWH last week, an increase of 4.06%. The maximum daily generation was 5630 KWH com rred to i900 KH last week, an increase of 1.60%. The incicated peak this week was 2050 Ky comoared to 2550 iW last week, an increase of 3.92%. UNTT CUTAGE AND RELAY OPERATIONS: Monday 27th at 6:00 pm to Tuesday 23th at 5:00 pm Tuescay 2th at 5:h5 om to 9:00 pm Thursce 30th at 4:30 am to 5:15 an at 12:30 pn 2nd at 13:30 an Unit No. 7 out of service cue to dilution of crankcase oil from a leaking fuel injection nozzle. Nozzle repaired and crankcase oil changed. : Unit No. 2 out of service for lube oil filter change. Unit No. 2 out of service to repair fucl teak on engine fuel heacer,. Unit No. 2 out of service to revlace oroken head bolt on cylinder No. S. Unit 10 radiator fans triprec on tiermal over- load and engine shutdown cn over temperature causing loss of 300 KW. when the engine shut- down the reverse power relay (07) ana engine overspeed device (12) operated. Unit No. 1 generator breaker tripped, there were no relay targets, its engine continued to rin without electrical load. The operatcr manually tripped feeder OC3's in the substation yard, started Unit No. 7 and restored power to plant services and Mile 13-FAA. Unit No. 1 and Unit ilo. 3 were placed on the dus anc all services restorsc, Station & FAA Outage - 5 minutes Feeder Outaze -15 minutes or ou OTHER PLAiT PROBLE?S: Saturday 2nd at 9:00 am Saturday 2nd at 10:00 am Saturday 2nd at 11:15 am Bernard E, Hartran Power Plant Superintendent -86- JECT: ‘Weekly Report 26 June - 2 July Jaly 5, 1977 An instrument line on the No. 1 engine fuel system ruptured. The fuel leak was isolated and tne Line repaired. A bolt holding a fuel and oil line support oracket on <he No. 2 engine broke causing a Large oil leak. Repairs were ~ade by the operator. \ proper bolt was not available, temporary repair made with a longer bolt and spacers. 3 A fuel pressure gauge line on Unit No. 3 ruptured, it was isolatec and reraired by the operator. -87- CORDOVA PUBLIC UTILITY POVER GENERATION DEPARTMENT June 27, 1977 TO: General Marmger SUBJECT: Load Survey A load survey was conducted on June 2h, 1977 to determine the distribution of load. The data collected is not precise but will serve to identify feeder unbalances and the general load pattern. Data obtained is tabulated below. Feeder , Load-KVA Maximum Unbdelance Generator 2520 83 KVA (3.29%) 3 Mile Bay (2.LXV) 200 66 KVA (33%) Lake Road (2.LKV) 430 36 AVA (8.3%) Power Plant Service 18 6 KVA (33%) Mile 13-Faa 150 5 KVA (3.3%) 12470 Town Feeder 1080 260 KVA (2k%) Unidentified Feeder 62 Unknown Power plant station service is not metered, this represents a loss of about 150,000 KWi/year. The feeder unbalances increase line voltage drop which is an unnecessary loss of power, The 12470/7200 Volt Town Feeder, 3 Mile 3ay and Lake Road Feeders are examples of this problem. Data was not obtained on a sixth feeder which is not identified and not easily accessible for current measurements. A sketch with distribution of system loads is attached. Saul ae rd Grae eee Berrard E. Hartman Power Plant Superintendent =§8- SUBJECT: Weekly Report 19-25 June June 27, 1977 LOSS OF PIANT ON LINE FAULTS: Station generation was lost twice during the week in conjunction with Line faults. No feeder protective relays operated; perhaps the generator voltage regulator fails to provide sufficient boost during faults and the generator field collapses causing loss cf lead. Since the engine governor is operating sluggishly it is likely the unit would trip on overspeed on the loss of load. An examination of protective relaying arrangements at the power plant will be accomplished, after which recommendations on necessary corrective action will be provided. gerne, tee Berrard =. Hartman Power Plant Superintendent =e9- CORDOVA PUBLIC UTILITY POWER GENERATION DT PARTMENT June 27, 1977 TOs General Manager SUBJECT: Weekly Report The following is a summary of power plant operations for the week of 13925 June. LOAD: ‘Total plant generation was 290,020 KvH ‘compared to 273,140 Ki last week, an increase of 6.17%. The maximum daily generation was 4,900 K.H ccmpared to 49,350 KWH last week, a decrease of 8.95%. The incicated peak this week was 2550 KW compared to 2750 Kv last week, a decrease of 7.27%. URIT OUTAGE ANL RELAY OPERATIONS: Suncay 19th at 2:h5pm: Fault on 12KV Town Feeder near St. Elias cannery trincea the No. 2 generator, Station Outage =-30 minutes 12 KY Town Feeder-l5 minutes Pricay 2hth at 8:25pm: Fault on 12KV Town feeder near St. ilias cannery wrinnec the No. 2 generator. Station Outage -10 minutes 12 KV Town Feeder-10 minutes FULL AND LUBE DATA: : Station Specific iioe2 Fuel Oil Fuel Consumption Luce Cil 22228 Gal 13.04 Ka/Gal dod Gal SUIMARY °F G.SRATCR CONDITION: Discussion with operators and observation has revealed the following lini ccnaitions for operation: Unit Rating Capability Renarks a: 1950 KW 1500 KW Cracked block, insuificient cooling for jacket water and lute oil. 2 2650 KW 2h00 Kw Insufficient cooling for jac! 2nG lube oil-zovernor will not ncl frequency stable. my 600 KW S00 KW Leaking cylinder liners anc/or cylinder heads, 8 750 KW 600 Kw = 9 750 KW Out of Service , .Bad crankshaft, cracked clock. Bad raaiator. 10 1100 Kw 900 Ki =90- SUBJECT: Weekly Report 19225 June June 27, 1977 LOSS OF PIANT ON LINE FAULTS: Station generation was lost twice during the week in conjunction with line faults. No feeder protective relays operated; perhaps the generator voltae regulator fails to provide sufficient boost during faults and txe senerator field collapses causing loss of load. Since the engine governor is cocraving sluggishly it is likely the unit would trip on overspeed on tne loss of load. An examinavion of protective relaying arrangements at the power plant will be accomplished, after which recommendations on necessary correctis action will be provided. Bermrd E, dartzan Power Plant Superintencent APPENDIX 1977 POWER REQUIREMENTS STUDY CORDOVA PUBLIC UTILITIES INTRODUCTION Alaska 16 Cordova serves both Act and Non Act Consumers. The Act beneficiaries are located along Whitshed Road to Three Mile Bay and along the Copper River Highway to Mile 13 at Cordova Airport. The Non Act beneficiaries are located in the centrally developed district on the shores of Orca Inlet between Mt. Eyak and Mt. Eccies: GENERAL DATA Cordova, Alaska is located on the southeast shore of Orca Inlet near the eastern entrance to Prince William Sound. The community is surrounded by the Chugach National Forest, with most of its development on the foothills of Mt. Eyak facing across Orca Inlet toward Hawkins Island extending from the coast back to Eyak Lake across a narrow divide between the slopes of Mt. Eyak to the north and Mt. Eccles to the south. Five thin lines of settlement radiate from the central development, two extend around both sides of Eyak Lake, one along Whitshed Road, one along Orca Road, CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY and one along the Copper River Highway to Mile 13 at the Cordova Airport. Cordova is approximately 160 air miles southeast of Anchorage and 410 miles northwest of Juneau, while the nearest community, Valdez, lies 65 air miles to the northwest. Presently, Cordova is accessible only by air and water. Plans for the construction of an overland connection to the State Highway System have been delayed, perhaps indef- initely. Cordova was founded in the early 1900's to ship coal, oil, and copper from the Wrangell Mountains. Today, the fishing and fish processing industries forms the base of the commun- ity's seasonal economy. Recently, Cordova began assuming prominence because of offshore oil and gas exploration activities in the Gulf of Alaska and because of its proximity to Gravina, a possible terminus of a pipeline transporting North Slope Gas. At present, Cordova has a permanent population of approxi- mately 2,300 persons, but each summer an influx of transient fishermen and cannery workers double Cordova's population. CORDOVA PUBLIC UTILITIES 1977. POWER COST STUDY The Cordova Public Utilities Board operates the Municipal Power System certificated but not regulated by the Alaska Public Utilities Commission. The power system consists of a diesel generating plant on the southwestern shore of Eyak Lake near the Copper River Highway and presently provides service north to the Municipal Dock, south to Three Mile Bay, and east to Cordova Airport on Mile 13 of the Copper River Highway. Six diesel generators are installed at the Eyak Power Plant; T=" OSURW, 1 = 7oURNEett red), fo = TEOOKW: 1-2, 650KW...: The 6SO0KW and 7SOKW units were used units purchased and installed in the early 1960's while the 1,950KW and 2,650KW units were new units purchased and installed in the early 1970's. Kilowatt hour sales, including non-revenue producing loads, street lights, and the system's own use have increased 70% during the past five years and is attributed largely to a switch by fish processors from a seasonal to an essential ly year round operation. Cordova Public Utilities has been upgrading the distribution system with the majority of lines scheduled to go underground CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY within the next five years. A new, 3-mile, 15KV feeder extension from the Municipal Dock along Orca Road to the New England Cannery at Orca is being considered for installa- tion within a year. Although power needs in Cordova have been temporarily satis- fied, the increasing demand and the need for adequate firm capacity has necessitated the need for additional generation to be installed within a year. Since diesel generation is costly, the Cordova Public Utilities has been investigating the feasibility of a hydroelectric plant at Power Creek, approximately six miles from Cordova. FISHING AND FISH PROCESSING Cordova's economy is presently dominated by the fishing and fish processing industry. However, other existing and poten- tial sources of economic strength are found in wood products, tourism, oil, gas, and the mineral industries along with government activities, notably those of the U. S. Coast Guard, the Federal Aviation Administration, and the Alaska Department of Fish and Game. Although mining was-the early basis of Cordova's economy, fishing and fish processing have nevertheless been important -97 CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY since the turn of the century and is the major economic activ- ity today. Cordova is the center of fishing and fish pro- cessing operations in Prince William Sound and the Copper and Bering River areas. The fisheries industry of the Cordova area has become highly diversified in recent years and has effected an increase in year round employment. All five species of salmon are taken along with King, Dungeness, and Tanner crab, shrimp, herring, herring roe in kelp, halibut, and Razor clams. Salmon is the most important fishery and accounts for three-quarters of the value of all fish and shellfish harvested in Prince William Sound. Presently, six major seafood companies operate in Cordova, although not all have processing facilities in the community. St. Elias Ocean Products, Morpac, North Pacific Processors, and the New England Fish Company can and freeze salmon and King, Dungeness, and Tanner crab. Alaska Packers has a pro- cessing facility in the community which is not used because of tectonic uplift associated with the 1964 earthquake. Whitney-Fildalgo § Peter Pan Seafoods have been active in Cordova sometimes. EEE CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY A number of other companies conduct highly specialized seasonal operations out of Cordova, particularly in the herring sac roe and salmon egg fisheries. Finally, Cordova has several small locally based firms which primarily pro- duce specialty products. Included in this group are Bayside Cold Storage, Odiak Smokeries, Blake's Canning, Glacier Packing, and others. CLIMATE The Cordova area has a maritime climate characterized by cool summers, mild winters and heavy year round precipitation. This type of climate is typical of the southeastern and southern coastal area of Alaska where the ocean exerts a modifying influence to cause relatively low seasonal and diurnal tem- perature variations. The nearness to the ocean, plus the frequent lows which develop or move out of the Gulf of Alaska, result in heavy precipitation. Precipitation levels in the Cordova area are further exaggerated by the rugged Chugach Mountains, while the steeply rising slopes of Mount Eyak and Mount Eccles cause still higher precipitation totals in the City itself. Cordova's winters are relatively mild. The coldest month (January) averages about 23 degrees F and, although CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY temperatures as low as -33 degrees F have been recorded, extremely cold weather usually is of short duration. On the other hand, summer temperatures in the community tend to be on the cool side, averaging between 50 degrees F and 55 degrees F, with daily maximums reaching into the low 60 degrees in July and August. The record high temperature in Cordova is 84 degrees F, a mark set back in 1946. As with extremely cold weather, however, lengthy periods of high temperatures in Cordova are rare. Heavy year round precipitation is a dominant feature of the Cordova area. Total precipitation averages 81 inches per year at the Cordova Airport and 168 inches annually in the City itself. In winter, precipitation occurs as snow and, since winter temperatures in Cordova are relatively mild, the snow here has a high water content and snow loading factors are very high. According to the U. S. Army Corps of Engineers, the design snow load factor for Cordova should be 100 lbs. per square foot, the highest in the State. In practical terms, it means that people have to guard against excessive snow accumulations on roofs, boats and light airplanes. Cordova experiences few strong winds although fishermen out in Prince William Sound often encounter severe storms. iV. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY Average annual wind speed at Cordova is less than 5 miles per hour, with easterlies being prevalent except in April and May when winds shift to east south east and in June when the prevailing winds are from the southwest. Occasionally, however, pressure patterns cause cold air from the Interior to flow across the coastal ranges to the Pacific Ocean. When this happens in the Cordova area, these winds funnel down across two glaciers near the airport to cause strong cross winds and sometimes prevent aircraft from landing. VEGETATION AND WILDLIFE Cordova is surrounded by the Chugach National Forest. The timber in this area is characterized by overmature mixed stands of Sitka spruce and western hemlock, with minor amounts of mountain hemlock and black cottonwood. Pure Sitka spruce stands usually only occur along river banks, although this species does dominate stands on the glacial flats in the Copper, Martin and Bering River valleys. The Copper River delta flats are a vast tidal marsh with a vegetation cover of salt and freshwater marsh grass and grasslike plants, willow, alder, plus a few scattered stands of Sitka spruce and cottonwood. This is a major resting, -101- CORDOVA PUBLIC UTILITIES 1977. POWER COST STUDY feeding and nesting area for migratory birds in the Pacific flyway and is within the 330,000 acre Copper Delta Game Management Area which was jointly established by the U.S. Forest Service and the Alaska Department of Fish and Game in 1962. The productivity of the waterfowl habitat in the area was greatly reduced by the 1964 earthquake which uplifted the beach by about 6 feet and converted productive brackish ponds into infertile freshwater ponds. To some extent, this loss has been offset by the uplifting of islands and sandbars and their subsequent conversion to prime wildlife habitat. Big game animals in the Cordova area include black bear, mountain goat, deer and moose, while glacier bear have been observed in Port Gravina. Moose, however, are not native to this area and the present herd of 500 or so is descended from 26 animals which were transplanted here in 1949. Furbearers are also plentiful and include wolf, wolverine, lynx, beaver, mink, muskrat, marten, land otter, fox, weasel and coyote. While a number of big game hunters are attracted to Cordova, the area is best known for its waterfowl resources. The largest known concentrations of Trumpeter Swans in North = 102 = CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY America nest here, as well as 15,000 to 20,000 Dusky Canada geese and a variety of ducks, geese, cranes, shore birds and other sea birds. Bald eagles are also numerous, although the highest concentrations are in the Port Fidalgo area, closer to Valdez. Sea lion and seal inhabit several areas along the coast, while the coastal waters and streams afford a range of fishing opportunities to the sportsman. The Copper, Bering and Eyak River systems contain large king, red and coho salmon fisheries which are used by both commercial and sport fishermen, with the Eyak River red and coho salmon fishery and several small trout lakes being especially popular with local sportsmen. Clam digging is a popular pastime, while the waters of Prince William Sound provide excellent fishing opportunities for salmon, red snapper, flounder, halibut, crab. and shrimp. POPULATION Since 1960, Cordova has experienced a period of steady growth, due primarily to expansion within the fishing and fish pro- cessing industry and the resulting lessening of seasonality in that industry. Between 1960 and 1970, Cordova's population a 73 Vi. CORDOVA PUBLIC UTILITIES 1977. POWER COST STUDY increased 28.6 percent and this rate has been surpassed since 1970. The estimated population of 2,000 in the Cordova area in 1975 is 32.2 percent above the 1,513 persons recorded as living in Cordova and Meakerville by the 1970 census. However, some of this apparent increase is due to the fact that the Cordova planning area (Cordova and road-connected areas as far out as Cordova Airport) is larger than the two census enumeration districts. TRANSPORTATION Cordova is presently accessible only by water and by air. The rugged Chugach Mountains, with their massive icefieids and glaciers, have greatly restricted access to Prince William Sound. Only two land routes into the area are developed at this time. One of these is via railroad tunnels between Portage and Whittier and the second is via the Richardson Highway south of Glenallen to Valdez. No land routes connect any of the communities on Prince William Sound since the deeply indented coastline makes the cost of such connections prohibitive. However, to some extent, the Southwest marine highway system does fulfill this function. During the next twenty years, regional transportation routes serving Cordova are expected to undergo a fundamental change. era \ K ) LasTii -104- CORDOVA PUBLIC UTILITIES 1977. POWER COST STUDY A highway route via the Copper River valley to Chitina should connect the community to the Interior highway system and improved automobile access to Whittier and an upgraded ferry service should also be available. As a result, Cordova will become more accessible for highway travelers although air should remain the primary mode of travel for Alaskan visitors to the community and for Cordova residents. Even by Alaska standards, Cordova has exceptional airport facilities and airline service for a town of its size. The community has two State airports. Cordova Airport, located at Mile 13 of the Copper River Highway, has a 7,500 foot paved runway capable of accommodating jet traffic. The Eyak Lake Airstrip, located on the north shore of Eyak Lake, has weighing up to 12,500 pounds. Two heliport facilities are also located at this airstrip although only one of these has a wooden platform. Finally, Eyak Lake itself serves as a seaplane base and has a 10,000 foot landing area which is used by float planes or those equipped with skis, depending upon the time of year. VII. O1LAND.GAS a 1,950 foot gravel runway which is used by small planes Oil and gas developments played a role in Cordova's economy =105- CORDOVA PUBLIC UTILITIES 1977. POWER COST STUDY in the early days and promise to do so again in the future. The Katalla field, discovered in 1902, was Alaska's first producing oil field. Thirty-six shallow wells were drilled here although only 18 produced oil in commercial quantities and the most productive yielded a mere 20 barrels of crude oil per day. All told, the entire Katalla field produced only about 154,000 barrels of oil in over 30 years of oper- ation. Upcoming oil and gas-related developments, however, promise to have a much more substantial and permanent impact on Cordova's economy. The Gulf of Alaska is a major undeveloped petroleum province although estimates of its magnitude remain highly specu- lative. For example, the Alaska Department of Natural Resources has estimated the Gulf to have combined onshore and offshore reserves in the vicinity of 8.8 billion barrels of recov- erable oil and 64.2 trillion cubit feet of natural gas. The U. S. Geological Survey's estimates are rather more conserva- tive. That agency estimated the scale of undiscovered recoverable oil and gas resources of the entire south coastal area of Alaska to be in the neighborhood of .5 to 2 billion barrels of oil and 1 to S trillion cubit feet of natural gas from onshore lands and between 1 and 6 billion barrels of oil and 2 and 17 trillion cubic feet of natural gas from CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY offshore areas. The Bureau of Land Management's estimates for the area between Cordova and Yakutat which is scheduled to be leased are the "high" estimates developed by the U. S. Geological Survey, i.e. 2.8 billion barrels of oil and 9 trillion cubic feet of natural gas. Although the Trans Alaska pipeline route for transporting North Slope oil has been established and has been completed, the route for transporting North Slope natural gas has yet to be determined. Three major route proposals are under consid- eration. Arctic Gas proposes to construct a line from Prudhoe Bay, through Canada, to the U. S. Midwest. Alcan proposes to construct a line from Prudhoe Bay to Fairbanks, through Canada, to the U. S. Midwest. El Paso proposes to con- struct a line from Prudhoe Bay to Pt. Gravina near Cordova, and transport LNG from Pt. Gravina to points in California. If a pipeline route through Canada is selected, Cordova will feel very little impact from this development. If, on the other hand, the El Paso route is selected, Cordova would feel a substantial direct impact since the proposed terminal at Gravina Point is in the vicinity of the community. This impact would continue to persist after the construction phase e106 - CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY since a large share of employment associated with the terminal and liquefaction plant is expected to live in the City. WOOD PRODUCTS The wood products industry has been a small but significant element in Cordova's economy since the community was founded. In the early days, timber was cut sporadically to meet demands for mine timbers, railroad ties, fish traps, dock pilings and community needs. Today, a small sawmill at Point Whitshed cuts dimension lumber primarily for use in the local area. MINERAL DEVELOPMENT Although mining played an important part in Cordova's econ- omy in the past, exploration and development of metallic and non-metallic minerals in the region is presently at a fairly low level. This does not mean that the region has a low mineral potential. Known occurrences of metallic minerals include copper, gold, silver, molybdenum, antimony, nickel, iron, lead and zinc and known non-metallic minerals include coal, limestone and sand and gravel. Most of the copper produced in Alaska came from the Kenni- cott mones in the Chitina River valley between 1911 and 1938. CORDOVA PUBLIC UTILITIES 1977: POWER: COST: STUDY Four mines in this area yielded about 1.2 billion pounds of copper from ore averaging an extremely high 12.4 percent copper. The discovery of these deposits led to the construc- tion of the Copper River and Northwestern Railroad and the development of port facilities at Cordova. However, these deposits are believed to be now largely depleted although small scale operations are periodically undertaken, such as a recent operation which was engaged in hand sorting old tailings and flying out the ore. Gold and silver have been produced in the Cordova region the past but no major gold rush occurred here. Coal, on other hand, has long been of interest. The Bering River coal field, east of the Copper River, was discovered in 1896 and practically all..of it<wassoon.covered: by..coal. claims. The withdrawal from entry of Alaska's coal lands in 1906 caused a good deal of ill feeling in the Cordova area, resulting in the dumping of some Canadian coal in the bay in 1911. However, although coal of high quality, including both coking coal and anthracite, is believed to be present in large quantities in the Bering River field, the prospects for proving a large reserve tonnage of economically minable coal in a single block are not very encouraging. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY TREND DATA Kilowatt hour sales in millions less sales to the large commercial classification for the period 1967 through 1976 were trended. The large commercial loads over 350 KVA were removed to "normalize" the historical growth as much as possible. Both logarithmic and curvilinear projections were established and reviewed based upon recent growth and anticipated growth. The projected values of the mathematical trends exceeded the KWHR estimates by 12% in 1981 and by 17% in 1986. The large commercial loads with an installed transformer capacity of and above 350 KVA were individually reviewed and estimated. The small commercial loads including those between 50 and 350 KVA were reviewed and estimated on a group basis. CPU's records had been previously set up to include loads between 50 and 350 KVA in the small commercial classi- fication. XI. COMMENTS BY CONSUMER CLASSIFICATION Town Residential, ACT In 1976, KWHR sales to this classification represented 25% of Sere CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY the system's total KWHR sales. Estimates indicate 25.4% in 1981. and25.7%: tor 1986. Projection values for residential KWHR sales were based on historical growth between 1967 and 1976. Small Commercial, ACT The number of consumers and KWHR monthly usage have shown a steady increase over the trended period between 1967 and L976% In 1976, KWHR sales to this classification represented 4% of the system's total KWHR sales. Estimates indicate 4% in 1981 and 4.6% for 1986. Projections were based on historical growth. Small Commercial, NON-ACT The number of consumers have increased steadily since 1966, however, the monthly usage was relatively constant between 1966 and 1975, however, in 1976, the monthly usage increased dramatically and the cause is unknown at this time. The 1981 and’ 1986 usage forecasts for this classification were based on an assumed annual growth of 65 KWH/mo per year CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY through 1981 and 60 KWH/mo per year through 1986. In 1976: KWHR sales to. this classification: represented 28.7% of the system's total KWHR sales. Estimates indicate 26.6%. tn 1984 and::25 294. for 1986: Large Commercial, ACT Large commercial users between 50 KVA and 350 KVA are included in the small commercial classification due to CPU's existing record keeping system. The large commercial user over 350 KVA is- the F.A.A. complex at the new Cordova Airport. Two named potential and one unnamed potential large commer- cial users over 350 KVA are projected through 1981 and two additional through 1986. Large Commercial, NON-ACT Large commercial users between 50 KVA and 350 KVA are included in the small commercial classification due to CPU's existing record keeping system. +112 - - CORDOVA PUBLIC UTILITIES . 1977 POWER COST STUDY The four large commercial users over 350 KVA are cannery oper- ations. Large commercial additions were not projected through 198i and two unnamed potential loads were projected through 1986. Municipal, NON-ACT The one municipal user from 1966 to 1976 consists of the Cordova City Hall. A new City Hall complex is under con- struction and scheduled for completion in 1977. Slight increases in KWHR usage have been projected for 1981 and 1986. In 1976, KWHR sales to the municipality represented 8.2% of total KWHR sales. Estimates indicate 5.6% in 1981 and 5.1% in 1986. Street Lights, NON-ACT In 1976, street lighting KWHR usage represented 2.5% of total KWHR sales. Estimates indicate 1.7% in 1981 and Lit; am T9386. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY SYSTEM LOSSES System loss historical data between 1967 and 1976 is erratic; varying from 1.3% in: 1969" t615-2%.in 1973; however, the average system loss is 12.5% between 1972 and 1976, and an average of 9.2% between 1967 and 1976. An average of 10% was assumed to derive the projected system losses from the standard curve. CLOSING COMMENTS The annual KWHR estimate for 1981 exceeds the logarithmic trend by 11.7% and the logarithmic trend exceeded the estim- ate by 16°63 in 1986. The KWHR sales estimates for 1981 and 1986 were based upon general knowledge of the area obtained from utility manage- ment and personnel, land use studies, and historical data. Future load growth for Cordova is considered to be excellent as new industries and commerce develops. The potential gasification plant at Pt. Gravina would impact CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY the load growth substantially and revised estimates should be projected as major industries develop in the Cordova area. x =215- FORM APPROVED SYSTEM DESIGNATION OMB NO. 40-R3881 Alaska 16 Cordova NAME OF SYSTEM USDA - REA ACT SUMMARY OF CONSUMERS AND kwh ESTIMATES ] kwh ESTIMATES * Ceaenton constihes NO. OF CONSUMERS wh ESTIMATES 1981 | 19 86 1981 |__ 1986 1, RURAL RESIOENTIAL | 240 | 390 | 700 | 800 j T | 2. SEASONAL (Ann.) ( months) | | | | | i | 3. TOWN RESIDENTIAL | | | } | 4. IRRIGATION (Ann.) Ap.) | | | | | | S. SECURITY LIGHTS (Ann.) | 1 j ae 6. SMALL COMMERCIAL | 20 25 i:3:5000 ' 4,000 | l | 7. PUBLIC STREET & HIGHWAY LIGHTING (Ann.) 1 as ! 8. PUSLIC BUILSINGS i { | | | 9. O1L WELLS fAnn.) © Ap.) | : 10. BORROWER'S OWN USE (NON-REVENUE PROCUCING) | (ann.) {= iA) ae | 5,000 | 5,000 l: | 11, LARGE COMMERCIAL (Ann.) (Under 350 kw) | | TOTAL POWER REQUIREMENTS fa i ITEM | 19 76 181 ! 19 86 | | “ | 12, ANNUAL kwh REQUIREMENTS feet Od) 15,270,000 18,830,000 |_13. INCLUOING LossEse 5 10.0% | 10.0% 14, ANNUAL LOAD FACTOR (Based on non-coincident | i i monthly system peak demand) | 60.7% | §3..5* | 53.5%) r 1S. NON-COINCIOENT MONTHLY SYSTEM PEAK | DEMANO (kw) 404 : i LEZ5 1,385 16. SOURCEIS) OF SUPPLY SELF GENERATION “REVISION OF kwh ESTIMATES DATED ESTABLISHED 8Y REVIEWEO BY MARKS ENGINEERING Li, f Ls ES Vij REA Form 341 (7-73 FORM APPROVES 2 313sTEM .SIGNATION cca OMB NO. 40-R368! Alaska 16 Cordova NAME OF SYSTEM Cordova Public Utilities USDA -REA NoN-ACT SUMMARY OF CONSUMERS AND kwh ESTIMATES | 1 | { A fn ESTIMATES * i | CLASS OF CONSUMER fac eee ND LOR CONSENS ee SEROMA RRS et 1 1 ! { 1. RURAL RESIOENTIAL 640 800 600 700 2. SEASONAL (Ann.) ¢ months) | TOWN RESIOENTIAL ! heen 4. IRRIGATION (Ann.) £ Ap.) S$. SECURITY LIGHTS (Ann.) | 5. SMALL COMMERCIAL 235 i 7. PUBLIC STREET & HIGHWAY LIGHTING (Ann.) ' i 1 j { ' g } |_ 2xPoexERKERNEX Municipal 1 ' 1 85.000 90,000 i } { ’ ; | j | 9. OIL WELLS (Aan.) ¢ Ap.) | } 10. BORROWER'S OWN USE (NON-REVENUE PROOUCING) : i | t j tAan.) : CE) Ez Cr) | 250,000 _ 250,000 11, LARGE COMMERCIAL (Ann.) (Under 350 kw) | ! ! TOTAL POWER REQUIREMENTS ‘ ti | iTEM | 19 76 19 7 13 86 | j { | j | | as xy an, ao MRS 11,400,000 | 13,800,000 19,100,000 ‘| { 1 é | ! eae eee aan | 12.3 % 10.0 % 10.0 %| 14, ANNUAL LOAO FACTOR (Based on nonecoincident monthly system peak demand) | 60:7. ¢ % 53.4 % 53.4 %, | DEMAND (ew fs os enG 29150 4,080 \ 16. SOURCE(S) OF SUPPLY Se G i * REVISION OF kwh ESTIMATES CATED a | ESTABLISHED BY | REVIEWED BY Marks Engineering REA Form 34) 7-73 ~ eee eee FORM APPROVED | SYSTEM DESIGNATION f OMB NO. 40-R3881 | | Alaska v NAME OF SYSTEM | Cordova Public Utilities LARGE COMMERCIAL ACT ATE |. cdnalays 2 7is BOTT | | INSTRUCTIONS - Snow number of consumers involved and include all large power consumers, sales for resale, wheeling | arrangements, etc. | USDA - REA | | NNR OR CAa ce NRE R | ESTIMATED kw BILLING CEMANO kwh USAGE | 3 ; 198] | 19 13 l 13 86 Sol. ene Besa ee) gi | | | | LL FAA L603 i 160 | 600,000 600,000 | *New England Fish Co. 1500 : 500 400,000 400,000 | j j j | Cordova Dock + Holding 350 | 350 500,000 | 500.000 | | P i i | | | | i. Unnamed Potential - 200 | ss | 500,000 __Unnan tial |= __ 200 is 500,000 wan pepe * Seasonal fociat REA FORMJ41a 7-73 ois —_———— FORM APPROVED SYSTEM SESIGNATION Sere eos | Alaska 16 Cordova : | USOA-REA NON-ACT | NAME OF SYSTEM | Cordova Public Utilities LARGE COMMERCIAL | OATE | | | Late 7 FOF 7 | INSTRUCTIONS - Show number of consumers involved and include all large power consumers, sales for resale, wheeling | arrangements, etc. Seen eee | ESTIMATED kw BILLING CEMAND | kwh USAGE \ j M820. | ig Ries | 19 8] | 13396 Es Nom thinbacdseckc | 200 ~| 200 ! 800,000 | 800,000 | Morpac | 400 ~ | 400 1,150,000 | 1,150,000 [.2St. Ettes 1007 | 100 | 300,000 300.000 | Unnamed potential | 140 | 600,000 | Unnamed potential | 140 600,000 REA FORM34ia 7-73 i090 = SYSTEM DESIGNATION FORM APPROVED 11, LARGE COMMERCIAL (Ann.) (Under 350 kw) Hl | TOTAL POWER REQUIREMENTS OMB NO. 40-R2881 Alaska 16 Cordova USDA Se REA ACT NAME OF SYSTEM SUMMARY OF CONSUMERS AND kwh ESTIMATES CL ASS‘OF CONSUMER i NO. OF CONSUMERS kwh ESTIMATES * | | 13981 19 86 1981 | 1986 i 1, RURAL RESIOENTIAL 240 390 (oko 800 2. SEASONAL (Ann.) c months) | 3. TOWN RESIDENTIAL | | | es r 4. IRRIGATION (Ann.) ( hp.) | | | | | } S. SECURITY LIGHTS (Ann.) | | | 6. SMALL COMMERCIAL | 20 25 3,000 4,000 = 7. PUBLIC STREET & 4IGHWAY LIGHTING (Ann.) LS | 1 + 1 ; 8. PUBLIC BUILOINGS | | ' | | | | 9. OIL WELLS (Ann.) ¢ hp.) | i | oe ' | 10. SORROWER’S OWN USE (NON-REVENUE PROOUCING) | | | \ (Ann.) eC | (1) 15,000 1 §,000 : | | | | —_—_——e—eeee——eeeeeee—eeeeeee ESE | Leh (TEM | 19 76 | 138 1 | 19 86 eNO TCLoR RECUR ERENT S | 2,150,000 15,270,000 _18,830,000 | 13. INCLUOING Lossese | 1253-%.| ‘10.0% | 10.0% 14. ANNUAL LOAO FACTOR (Based on nonecaincident | 1 monthly system peak demand) 60.7%! 53.5% 53.5% 1S. NONeCOINCIOENT MONTHLY SYSTEM PEAK | ; |___SEMANO ‘kw) | 404 ! E125 i eo 16. SOURCEIS) OF SUPPLY pig MR TORE CRE a nai Sige Peet ee eae ka See * REVISION OF kwh ESTIMATES OATED REVIEWED BY ESTABLISHED BY MARKS ENGINEERING REA Form 341 7-73 FORM APPROVED sr2i EM -SIGNATION Se ee atoeae. | Alaska 16 Cordova an } : NAME OF SYSTEM USOA-REA is Haresces, pas Cordova Public Utilities SUMMARY OF CONSUMERS AND kwh ESTIMATES ote : CLASS OF CONSUMER NO. OF CONSUMERS kwh ESTIMATES * te 19 3 1986 9 3 1 ! 1s 86 640 800 600 | 700 oss SEASONAL (Ann.) ( months) | 3. TOWN RESIDENTIAL | | | 4. IRRIGATION (Aan.) ¢ Ap.) | | ' | | | $. SECURITY LIGHTS (Ann.) CL) (1) 300,000 300,060 | | 8. SMALL COMMERCIAL 235 260 7-66 2,000 | {| 7. PUBLIC ST T & HIGHWAY LIGHTING (Aan.) | | : SSPURKKAKSRNSK Municipal 1 l 85,000 90,000 I | 9. OL WELLS fAnn.) ¢ Ap.) | 10, SORROWER’S OWN USE iNON-REVENUE PRODUCING) | | ! (ann) Ci) (1) 250.000 250,000 | COMMERCIAL (Ann.) (Under 350 kw) } m 11. LARS | TOTAL POWER REQUIREMENTS | iTEM 19 76 19 81 13 86 | 12. ANNUAL kwh REQUIREMENTS 11,400,000 13,800,000 19,100,000 | 3 1 | 13. INCLUOING LOssese ee % Telleeath % 10.0 % | ory | 14 ANNUAL LOAS FACTOR (Based on non-coincident ' | | monthly system peak demand) 60.7 % Bt % 53.4 % | 15. NON-COINCIDENT MONTHLY SYSTEM PEAK i | | | DEMAND (mv) | 2,146 2,950 4,080 | 16. SOURCEISI OF SUPPLY Self Generat * REVISION OF kwh ESTIMATES OATED | €STA@LISHED BY | REVIEWED By | Marks Engineering REA Form 341 7-73 FORM APPROVED | SYSTEM OESIGNATION =rer~ OMB NO. 40-3881 | | Alaska 16 Cordova | USDA-REA NAME OF SYSTEM | Cordova Public Utilities | LARGE COMMERCIAL ACT DATE [taly <2, LOTT | INSTRUCTIONS - Show number of consumers involved and include all large power consumers, sales for resale, wheeling | arrangements, etc. | ESTIMATED kw BILLING OEMAND | kwh USAGE | NAME OF LARGE COMMERCIAL | 1381 | 1986 i 193] | 19 86 | | | | | 1 FAA | 160 | 160 | 600.000 600,000 *New England Fish Co. 1 500 500 | 400,000 400,000 | | | Cordova Dock + Holding | 350 | 350 500,000 | 500 000 i } | Unnamed Potential - 200 - 500,000 | Bie yon 1 os | 200 - 500,000 | | ; \ | | | | See 1 | | | a | * Seasonal — REA FORM341a 7-73 =122- FORM APPROVED | SYSTEM SESIGNATION Re aon | Alaska 16 Cordova | USDA-REA NON-ACT NAME OF SYSTEM | | Cordova Public Utilities LARGE COMMERCIAL OaTEe | Ju | INSTRUCTIONS - Snow number of consumers involved and include all large power consumers, sales for resale, wheeling | arrangements, etc. NAME OF LARGE COMMERCIAL | ESEIDATEO kr BIEEING) OEMONO- | AUSAGE faci k use pee Ba 1986 | North Pacific 200 | 200 | 800,000 __800,000 Morpac 400 | 400 1,150,000 | 12750 ..000 St. Elias | 100 | 100 300,000 300.000 |__Unnamed_ potential TAO 600,000 | Unnamed potential | 140 600,000 REA FORM34ic0 7-73 EXISTING PLANT FACILITIES CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY EXISTING PLANT FACILITIES EYAK POWER PLANT AND SUBSTATION GENERAL The Cordova Public Utilities Board operates the Municipal power system certificated by but not regulated by the Alaska Public Utilities Commission. The power system consists of a diesel generating plant on the western shore of Eyak Lake near the Copper River Highway. Power is distributed at 2400 volts (delta) and 7200/12500 volts. The 2400 volt system is overhead while the 7200/12500 volt system is overhead and underground construction. LAND The Eyak Power Plant is located on the southwestern shore of Eyak Lake and north of the Copper River Highway. CORDOVA PUBLIC UTILITIES 1977 . POWER COST STUDY. STRUCTURES The power plant. structures-measure 60! x. 32" x 14'..and 120! x 54" x 14"... Both buildings consist ofa concrete floor,..metal framework, and are covered with uninsulated, corrugated metal siding. An enclosed space, approximately 8' x 8', serves as the oper- ator's office. Units _7,--8,9,-10,-switchgear,-andauxiliaries—are-located inthe 60" "x32" "building while units I and 2° are located in the 120" x 54" building adjacent. and connected to the 60' x 32! Structure, An—open—area,_50'-x 50',-adjacent to Unit 2 serves as a laydown area and maintenance shop. This area can be utilized to install an additional unit similar to Unit .2Z. A 20' x 24' x 8' metal framework and sheet siding structure located approximately 50 feet north of the main plant structure houses the cooling water pumps for all units. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY The pumps draw cooling water from Eyak Lake and return the heated water to a cooling pond through a perforated spray pipe. A 50' x 80' x 18' metal building is adjacent and connected to the power plant building and houses a municipal vehicle and repair shop. PRIME MOVERS AND GENERATORS Six diesel generating units are presently installed in the power plant buildings; 1 - 600 KW, 2 - 750 KW, 1 - 1100 kW, 1 + .1950::KW, and. 1 =" 2650-KW.. Units 7, 8, 9 and 10 were used units purchased and installed between 1961 and 1966. Units 1 and 2 were new units purchased and installed in 1971 and 1975, respectively. Units 7, 8, and 9 were purchased in 1960 and had been installed in a war-time Marine freighter in 1945. These units are G.M. diesel, 12 cylinder ATLS, developing 900 BHP at 900 RPM with super chargers. All three units drive Crocker-Wheeler gener- ators and 10 KW exciters, directly connected. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY Units 7, 8 and 9 and their auxiliaries were valued at approxi- mately $175,000 in 1968. Unit 9 is no longer in service due to a cracked block and damaged crankshaft. Units 7 and 8 suffer a number of maladies such as fuel and water leakage into the lubrication oil due to worn components, water leakage into the pressurized combustion air boxes. Unit 10, 1100 KW, was purchased used from Federal Government Surplus in 1966 as an emergency measure. Unit 10 was originally purchased in 1950 for government use, and is a G.M. Diesel, 16 cylinder, developing 1700 BHP at 750 RPM, driving a Crocker- Wheeler generator and exciter, directly connected. Unit 10 was valued at approximately $100,000 in 1968. It is also beset by fuel and water problems due to worn and deteriorating com- ponents. Units 7, 8, and 10 have outlived their usefulness and have become increasingly difficult and expensive to operate and Maintain. Their reliability is poor and occasionally, they are pressed into service during emergencies to meet peak loads or black plant start up. Their value for spare parts is CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY minimal since they are similar units and similar parts have worn or deteriorated during the last 30 years. The fuel efficiencies of Units 7, 8, and 10 are not known at this time since fuel to the engines is not metered individually. However, it is suspected that fuel efficiencies have decreased substantially. Unit 1, 1950 KW, was purchased new and installed in 1971 at an approximate cost of $613,000. Unit 1 is a DeLaval Enterprise DSR-46 diesel, 185 BMEP, 6 cylinder, turbocharged, developing 2670 BHP at 400 RPM, driving an Electric Products Co. generator and exciter. Unit 1 is presently running on a cracked block attributed to a casting flaw. Cracked heads have plagued the unit in the last several years. The cracked block is scheduled for replace- ment in September 1977. Lube oil cooling problems limit the unit's full output. Unit 2, 2650 KW, was purchased new and installed in 1975 at an approximate cost of $465,000. Unit 2 is a DeLaval Enterprise DSR-46 diesel, 225 BMEP, 6 cylinder, turbocharged, developing CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY 3657: BHP at-450 RPM; driving “an Etectric. Products Co.. gener - ator and exciter. Unit 2 has also been plagued with cracked heads and broken oil pumps. Lube oil cooling problems also limit the unit's full output to approximately 2200 KW. SWITCHGEAR Units 7, 8, 9, and 10 are connected to a Westinghouse, Type 6P, metalclad, 2400 volt metalclad switchgear lineup and control panels with 400 AMP manually operated oil circuit breakers. Unit Its connected: to 4: rederal Pacific Electric: Co...5: KV. 75 MVA, 1200 AMP, air circuit breaker. Unit 2 is connected to a Westinghouse 5 KV, 250 MVA, 1200 AMP, air circuit breaker. SUBSTATION The Eyak Power Plant Substation is a 42' x 42' fenced en- closure adjacent to the western end of the plant building. The substation consists of one 2400 volt string bus and one 12,500 volt string bus approximately 15 feet long, two 5,000 KVA, 2400/12,500 volt main power transformers, three, 39 oil CORDOVA PUBLIC UTILITIES 1977 -POWER COST STUDY reclosers, and one 150 KVA, 2400/480 volt station service transformer bank. Three 2400 volt, 19, fused cut out disconnects connect the 2400 volt switchgear for Units 7, 8, 9, and 10 to the 2400 volt string bus. The 2400 volt and 12,500 volt string buses are approximately 12 feet from the substation grade. The top of the 2400 volt and 12,500 volt reclosers and cable terminators for three outgoing feeders are approximately five feet from the substation grade. The cable terminators for the fourth 15 KV feeder are approximately two feet from the sub- station grade and are connected to the overhead 15 KV bus via bare conductors. The tops of the 150 KVA station service transformers are approxi- mately three feet from the substation grade and are connected to the 2400 volt string bus via bare copper tubing. All four distribution feeders, two at 2400 volts and two at 12,500 volt are routed via URD cable to nearby overhead lines. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY Three: :I5 KV; 20, <fused cut out dasconnects:the-URD. feeder to a 150 KVA, Wye Delta pad mounted transformer bank, serving the cooling water pump house with 240/480 volt service. No. 2 main power transformer is not connected at the present time. FUEL TANKS The existing fuel oil tanks consist of the following: Tank No. 1 Steel,--welded;~reund,;~-vertical;—30'D°x" 22" high 115,000 gallon capacity. Tank.No. 2 Steer, riveced, cylindrical, norizonta., 7" D x30": Tong 10,000 gallon capacity. Tank No. 3 Steel, welded, cylindrical, horizontal, 6' Dx 15' long 3,000 gallon capacity. CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY PLANT OPERATING PERSONNEL’ At present, a Plant Superintendent supervises four operators. Breakdown and routine maintenance is performed by operating personnel At least one operator per shift is assigned to operate and maintain the generating units. FUEL INVESTIGATION -134- CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY GPS; PGS: 1977 Fuel Sources At present, only Chevron (Standard Oil) distributes fuel oil, gasoline, lubricants, and other petroleum products in Cordova. Approximately 4.5 million gallons were distributed in Cordova in 1976. The dramatic increases in the cost of fuel in the early 1970's is attributed to the removal of price controls and the O.P.E.C. crude oil price increases. The price of Alaskan North Slope oil will be on a price parity with imported oil on the U. S. West Coast. It is anticipated that the cost of fuel oil in Cordova will continue to increase as cheaper supply sources will not be avail- able since domestic production cannot meet the U. S. demand and the 0.P.E.C. cartel continues to extract a higher price for crude Os The projected cost of fuel oil for 1977 through 1980 was based on the trend established during 1975, 1976, and 1977. -LS5~ CORDOVA PUBLIC UTILITIES 1977: POWER COST STUDY The University of Alaska's Institute of Social and Economic Research determined in 1970 that a cost escalation factor of 6% per year beyond 1980 would be applicable to fuel oil. How- ever, the trend in Cordova exceeds the UA determination and a fuel escalation factor of 10% per year has been assumed for the years 1980 through 1992 given Cordova's location, accessibility, supply source, and world oil prices. It was further assumed that major price increases such as the 0.P.E.C. increases will not occur during the ensuing years through 1992. At present, Cordova utilizes diesel fuel to generate electricity. The fuel oil is barged from Valdez which obtains its fuel oil from refineries in Kenai, Alaska and from Richmond, Washington. Two separate investor groups have proposed refineries at Valdez utilizing Alaska's royalty oil from the Alyeska Pipeline. A refinery in Valdez would secure Cordova's source of fuel oil, however, it is doubtful that significant cost reductions, if any, would become possible. Several major oil companies are now exploring the Outer Contin- ental Shelf in the Gulf of Alaska near Cordova and the possibility of securing a natural gas supply to generate electricity appears remote since cost of the gas may be prohibitive and emerging CORDOVA PUBLIC UTILITIES 1977 POWER COST STUDY national energy policies will discourage or prohibit its use for power generation. The El Paso Gas Line proposal could make Alaska North Slope gas available at Pt. Gravina near Cordova but again, the cost of gas and policies will prohibit its use for power generation. However, there is a possibility that power could be transmitted to Cordova from Pt. Gravina's liquefaction plant. At this time, the gas line route has not been determined and it may be late 1977 before the final decision is made by President Carter and Congress. Coal, gas, and some oil are available in the Kattala area, approximately 50 miles east of Cordova, however, the lands have been withdrawn from further development and it appears doubtful that these fuel sources would be politically and economically viable in the next 15 years. Coal from the Beluga Coal Fields or from Canada can be shipped into Cordova and may prove to be a viable alternative if hydro- electric power cannot be developed economically near Cordova within the next 15 years. ea oo= DISTRIBUTION SYSTEM DIAGRAMS POWER CREEK | HYDRO ELECTRIC 5 eral Is GORDOVA PUBLIC UTILITIES 7.2/12.47 KV LARGE POWER LOADS POINT INSTALLED KVA DEMAND KVA TYPE OF LOAD 1 75 KvA 30KVA Well Pump 3aece = 1/AcSR 2 m2 eva 30 kVA Lift Station 3 ‘167 Eva e2 rv School ‘ s s 150 Eva 30 KVA Sewage Plant 6 ma 30 vA 2 Small Comercial LARGE POWER LOADS 75 xva 33 Kva 10 Small Comercial POINT INSTALLED KVA DEMAND KVA TYPE OF LOAD , 43 mv 25 KVA = 3 Small Commercial 45 cma 20 KvA 2 Small Commercial 2 300 EVA 210 Rva FAA & Airport Complex 45 vA 20 KVA 2 Small Comercial 2 75 xva 33 Kva Well Pump 6 Power Plant 1000 Eva 200 KVA 1 Large Comercial 1000 KVvA 300 KVA 1 Large Commercial a57 mm 60 EVA I Large Comercial Man) 1 Large Comercial om 2 Small Comercial Bm 3 Small Comercial 1 Large Comercial 2 Large Commercial 1 Large Comercial 1 Large Comercial 1 Large Comercial LARGE PowmR LoaDs POINT INSTALLED EVA DEMAND EVA TYPE OF LOAD om Co Mospital & Library 7 33 Large Commercial 7 33 2 Small Commercial Large Commercial 2 Small Commercial Small Commercial 3 Small Commercial School 4 Small Commercial 7 Small Commercial ‘LamcE PowER LoaDs POURT INSTALLED KYA DEAMD KVA TYPE OF LoaD 1 30 ma 2 vA Life Station 2 45 EWA 32 EVA Large Comercial > 73 vA S3 EVA 1 Large Commercial PMOsECT* CORDOVA PUBLIC UTILITIES MAIN SUBSTATION FEEDERS GORDOVA PUBLIG UPRILITIELS REVISION eneo : DRawn: WPS Gwackao : TWL Bara: OCT.7,1977 cape: NT LARGE POWER LOADS POINT INSTALLED KVA DEMAND KVA eaeSbGu tb sb 8 8 $a 88 sBecereosaust S86 EF 8 EE TYPE OF Loan 1 Large Comercial 1 Large Comercial & Power Plant 1 Large Comercial 1 Large Comercial 2/0 RO AL, 8T 1 Large Commercial 1 Large Commercial 1 Large Commercial 2 Large Commercial 1 Large Commercial 2 Small Commercial 2 Small Commercial ‘3 Small Commercial 2 Large Commercial 3 Small Commercial 1 Small Commercial 2 Small Commercial 2 Seall Commercial 1 Large Commercial 1 Large Commercial School Lift station Sewage Plant 2 Small Commercial 10 Small Commercial 2 Smell Commercial 3 Small Commercial Hospital & Library School 4 Smell Comercial PROVECT: PROPOSED CORDOVA PUBLIC UTILITIES MAIN 8. eccrance « suestarion reeves GORDOVA PUBLIC VUFILITIES .-| nevision . OmaWwN + WPS Guackso +TWL Bara: OCT. Il, 1977 . scaie ' NTS ‘