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Castaic Power Plant

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pumped back to Pyramid Lake by the use of off peak energy when economical to do so. The pumping function at Castaic hydroelectric plant provides additional water for power generation beyond the supply of water available from the flow of the State Aqueduct. The City of Los Angeles has need for capacity to meet its peak requirements ranging from 3 to 6 hours per day in the winter to 6 to 10 hours per day in summer, depending upon climatic conditions. The water which normally flows through the West Branch of the State Aqueduct during off peak periods, is stored in the higher level Pyramid Lake. This water can be channeled through the turbine generators in a very short time to immediately meet short time peak demands on the DWP's electric system. If the need exists for power for longer than normal peak demand periods, extra water can be pumped back to Pyramid Lake from Elderberry Lake to extend the peaking period.
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was placed in service in February 1972. The unit also serves as a pump-starting unit for the six reversible units. The first main unit became operational in 1973. Unit six, the last unit, was placed in service in 1978. Power is generated at 18,000 volts then stepped up to 230,000 volts to be distributed to various receiving substations in Los Angeles. Each of the six 250,000 kilowatt units function as pumps as well as generators. Each pump will have a power input of 320,000 horsepower (240,000 kW) when pumping at a rate of 2,300 cubic feet per second (65 m/s). The turbines/pumps are used a few percent of the time.
134: 1073: 1101: 25: 1087: 513:. Castaic Lake has a surface area of 2,232 acres (903 ha) and a storage capacity of 324,000 acre-feet (400,000,000 m), with a normal maximum surface elevation of 1,505 feet (459 m) above sea level. The amount of water in the lake varies with the demand for water delivery from the West Branch of the State Aqueduct. 483:
are 130,000 kilowatts. The plant rating is 1,247,000 kilowatts (Nominal installed capacity is higher (over 1,500 MW), however when all main units are operating at full load in generate, they are de-rated by friction losses from the water flow in the Angeles Tunnel). The 55,000 kilowatt unit (Unit 7)
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sits at the south end of the Angeles Tunnel. The surge chamber is 120 feet in diameter and 400 feet high with 160 feet visible above ground. The chamber is there to relieve excess pressure in the tunnel and penstocks if the plant were to experience an emergency shutdown of its generators. It also
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The pumping forebay, which is separated from the main reservoir by a dam located downstream from the Castaic Power Plant, functions in connection with the pumped storage operations of the plant. This assures the availability of at least 10,000 acre-feet (12,000,000 m) of water which can be
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in 1983. Pyramid Lake has a surface area of 1,380 acres (560 ha) and a storage capacity of 180,000 acre-feet (220,000,000 m) with a maximum water surface elevation of 2,578 feet (786 m) above sea level. Pyramid Lake is the upper
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17 feet (5.2 m) in diameter. Under the cooperative development, this tunnel was enlarged to 30 feet (9.1 m) in diameter. The 7.2-mile (11.6 km) long tunnel, including the
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The Castaic Power Plant has six reversible 250,000 kilowatt main units and one conventional 55,000 kilowatt auxiliary unit. By comparison the largest
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Water from the Castaic Power Plant is discharged into Elderberry Lake (pumping forebay) from which it can be released into
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supplies water for quickly starting the plant's generators while water gains speed in the 7 mile long Angeles Tunnel.
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Image of a worker inspecting 13-foot conduits at the Castaic Hydroelectric Power Plant, California, 1973.
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Image of three California State Water Project employees picketing Castaic Reservoir, California, 1972.
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California State Aqueduct water en route to Southern California is pumped up through the
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The Castaic Power Plant is located about 22 miles (35 km) from the northern
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Pumped-storage hydroelectric power station in Los Angeles County, California
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Photographic Archive (Collection 1429). UCLA Library Special Collections,
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Photographic Archive (Collection 1429). UCLA Library Special Collections,
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Visible from Templin Highway and normally mistaken for a water tank, the
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Pumped-storage hydroelectric power stations in the United States
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Department of Water Resources of the State of California
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power from the falling water on the West Branch of the
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The Warne Plant was constructed by the 370:Los Angeles Department of Water and Power 259:186,000 acre⋅ft (229,427,622 m) 109:Learn how and when to remove this message 1780:Hydroelectric power plants in California 938:California Department of Water Resources 1775:Energy infrastructure completed in 1978 1770:Energy infrastructure completed in 1973 1034:Historic Pump-Storage Operation in WSCC 965: 282:28,400 acre⋅ft (35,030,884 m) 1150:University of California, Los Angeles 1133:University of California, Los Angeles 121:Dam in Los Angeles County, California 7: 47:adding citations to reliable sources 1643:Imperial Solar Energy Center South 1416:Big Creek No. 1, 2, 2A, 3, 4 and 8 1340:Los Esteros Critical Energy Center 814:Sacramento–San Joaquin River Delta 14: 1648:Imperial Solar Energy Center West 1146:Charles E. Young Research Library 1129:Charles E. Young Research Library 1099: 1085: 1071: 907:O'Neill Pumping-Generating Plant 23: 1709:Solar Energy Generating Systems 1633:Desert Stateline Solar Facility 1335:Huntington Beach Energy Project 1320:Donald Von Raesfeld Power Plant 34:needs additional citations for 1628:Centinela Solar Energy Project 1608:California Flats Solar Project 556:California State Water Project 1: 1613:California Valley Solar Ranch 445:for the Castaic Power Plant. 1699:Ivanpah Solar Power Facility 1694:Genesis Solar Energy Project 1245:Puente Hills Energy Recovery 366:pumped-storage hydroelectric 362:Castaic Pumped-Storage Plant 138:Front of Castaic Power Plant 1739:San Gorgonio Pass Wind Farm 1593:Antelope Valley Solar Ranch 948:Bay Delta Conservation Plan 912:Oroville–Thermalito Complex 897:Feather River Fish Hatchery 1801: 1653:McCoy Solar Energy Project 1638:Desert Sunlight Solar Farm 1603:Blythe Solar Power Project 1360:Russell City Energy Center 1325:Gateway Generating Station 452: 297:1,060 ft (323 m) 195:34.5873111°N 118.6566333°W 1663:Panoche Valley Solar Farm 1618:Campo Verde Solar Project 872:Buena Vista Pumping Plant 378:California State Aqueduct 131: 1749:Tehachapi Pass Wind Farm 1355:Moss Landing Power Plant 1266:Argus Cogeneration Plant 933:CALFED Bay-Delta Program 887:Dos Amigos Pumping Plant 882:Devil Canyon Power Plant 735:Little Panoche Reservoir 517:Pumped-storage operation 200:34.5873111; -118.6566333 1744:Shiloh Wind Power Plant 1734:Altamont Pass Wind Farm 1729:Alta Wind Energy Center 1456:Mammoth Pool Powerhouse 1107:Renewable energy portal 917:South Bay Pumping Plant 892:Edmonston Pumping Plant 418:Edmonston Pumping Plant 368:plant, operated by the 321:Installed capacity 211:Construction began 1623:Catalina Solar Project 1501:San Francisquito No. 1 1315:Alamitos Energy Center 1250:Sunshine Gas Producers 337:Annual generation 1516:White Rock Powerhouse 1345:Metcalf Energy Center 700:Clifton Court Forebay 58:"Castaic Power Plant" 1704:Mojave Solar Project 1673:Springbok Solar Farm 1598:Beacon Solar Project 1466:New Bullards Bar Dam 1451:Loon Lake Powerhouse 662:Thermalito Diversion 360:, also known as the 43:improve this article 1564:William R. Gianelli 1461:Moccasin Powerhouse 1426:Caribou No. 1 and 2 1330:Glenarm Power Plant 902:Kern River Intertie 877:Castaic Power Plant 867:Banks Pumping Plant 841:California Aqueduct 792:and bodies of water 775:Thermalito Afterbay 740:Los Banos Reservoir 657:Thermalito Afterbay 438:state of California 414:Tehachapi Mountains 358:Castaic Power Plant 279:Total capacity 256:Total capacity 191: /  147:Castaic Power Plant 127:Castaic Power Plant 1658:Mount Signal Solar 1441:Jaybird Powerhouse 990:on 13 January 2020 851:South Bay Aqueduct 846:North Bay Aqueduct 780:Thermalito Forebay 770:Tehachapi Afterbay 760:San Luis Reservoir 705:Elderberry Forebay 667:Thermalito Forebay 602:Elderberry Forebay 364:, is a seven unit 345:(gross, 2001–2012) 273:Elderberry Forebay 164:Los Angeles County 1757: 1756: 1717: 1716: 1572: 1571: 1476:New Exchequer Dam 1471:New Don Pedro Dam 1421:Camino Powerhouse 1411:Belden Powerhouse 1142:Los Angeles Times 1125:Los Angeles Times 1079:California portal 956: 955: 690:Bethany Reservoir 501:Castaic Reservoir 372:, which provides 355: 354: 219:Opening date 119: 118: 111: 93: 1792: 1678:Topaz Solar Farm 1581: 1521:William E. Warne 1406:Balch Powerhouse 1396: 1180: 1173: 1166: 1157: 1109: 1104: 1103: 1095: 1090: 1089: 1081: 1076: 1075: 1074: 1061: 1060: 1058: 1057: 1043: 1037: 1031: 1025: 1024: 1022: 1021: 1006: 1000: 999: 997: 995: 989: 978: 970: 943:Peripheral Canal 860:Other facilities 809:Sacramento River 549: 542: 535: 526: 351:(net, 2001–2012) 206: 205: 203: 202: 201: 196: 192: 189: 188: 187: 184: 136: 124: 114: 107: 103: 100: 94: 92: 51: 27: 19: 1800: 1799: 1795: 1794: 1793: 1791: 1790: 1789: 1760: 1759: 1758: 1753: 1713: 1682: 1568: 1531: 1525: 1481:New Melones Dam 1391: 1385: 1369: 1307: 1301: 1292:Imperial Valley 1270: 1254: 1228: 1222: 1218:Elkhorn Battery 1201: 1199: 1193: 1184: 1118: 1113: 1112: 1105: 1098: 1091: 1084: 1077: 1072: 1070: 1065: 1064: 1055: 1053: 1045: 1044: 1040: 1032: 1028: 1019: 1017: 1008: 1007: 1003: 993: 991: 987: 976: 972: 971: 967: 962: 957: 952: 921: 855: 823: 784: 765:Silverwood Lake 745:O'Neill Forebay 671: 558: 553: 519: 503: 490: 473: 457: 451: 410: 394: 346: 331:1247 MW (rated) 330: 312:Pump-generators 264:Lower reservoir 241:Upper reservoir 199: 197: 193: 190: 185: 182: 180: 178: 177: 139: 122: 115: 104: 98: 95: 52: 50: 40: 28: 17: 12: 11: 5: 1798: 1796: 1788: 1787: 1782: 1777: 1772: 1762: 1761: 1755: 1754: 1752: 1751: 1746: 1741: 1736: 1731: 1725: 1723: 1719: 1718: 1715: 1714: 1712: 1711: 1706: 1701: 1696: 1690: 1688: 1684: 1683: 1681: 1680: 1675: 1670: 1665: 1660: 1655: 1650: 1645: 1640: 1635: 1630: 1625: 1620: 1615: 1610: 1605: 1600: 1595: 1589: 1587: 1578: 1574: 1573: 1570: 1569: 1567: 1566: 1561: 1556: 1551: 1546: 1541: 1535: 1533: 1527: 1526: 1524: 1523: 1518: 1513: 1508: 1503: 1498: 1493: 1488: 1483: 1478: 1473: 1468: 1463: 1458: 1453: 1448: 1443: 1438: 1433: 1428: 1423: 1418: 1413: 1408: 1402: 1400: 1393: 1387: 1386: 1384: 1383: 1377: 1375: 1371: 1370: 1368: 1367: 1362: 1357: 1352: 1347: 1342: 1337: 1332: 1327: 1322: 1317: 1311: 1309: 1303: 1302: 1300: 1299: 1294: 1289: 1284: 1278: 1276: 1272: 1271: 1269: 1268: 1262: 1260: 1256: 1255: 1253: 1252: 1247: 1242: 1236: 1234: 1224: 1223: 1221: 1220: 1215: 1209: 1207: 1195: 1194: 1187:Power stations 1185: 1183: 1182: 1175: 1168: 1160: 1154: 1153: 1136: 1117: 1116:External links 1114: 1111: 1110: 1096: 1082: 1067: 1066: 1063: 1062: 1038: 1026: 1001: 964: 963: 961: 958: 954: 953: 951: 950: 945: 940: 935: 929: 927: 923: 922: 920: 919: 914: 909: 904: 899: 894: 889: 884: 879: 874: 869: 863: 861: 857: 856: 854: 853: 848: 843: 837: 835: 825: 824: 822: 821: 819:San Luis Creek 816: 811: 806: 801: 795: 793: 786: 785: 783: 782: 777: 772: 767: 762: 757: 752: 747: 742: 737: 732: 727: 722: 720:Lake Del Valle 717: 712: 710:Frenchman Lake 707: 702: 697: 692: 687: 681: 679: 673: 672: 670: 669: 664: 659: 654: 649: 644: 639: 634: 629: 624: 622:Little Panoche 619: 617:Grizzly Valley 614: 609: 604: 599: 594: 589: 584: 579: 574: 568: 566: 560: 559: 554: 552: 551: 544: 537: 529: 518: 515: 502: 499: 489: 486: 472: 469: 455:Angeles Tunnel 453:Main article: 450: 449:Angeles Tunnel 447: 409: 406: 393: 390: 353: 352: 339: 333: 332: 323: 317: 316: 313: 309: 308: 305: 299: 298: 295: 293:Hydraulic head 289: 288: 284: 283: 280: 276: 275: 270: 266: 265: 261: 260: 257: 253: 252: 247: 243: 242: 238: 237: 228: 224: 223: 222:July 11, 1973 220: 216: 215: 212: 208: 207: 186:118°39′23.88″W 175: 171: 170: 161: 157: 156: 153: 149: 148: 145: 141: 140: 137: 129: 128: 120: 117: 116: 31: 29: 22: 15: 13: 10: 9: 6: 4: 3: 2: 1797: 1786: 1783: 1781: 1778: 1776: 1773: 1771: 1768: 1767: 1765: 1750: 1747: 1745: 1742: 1740: 1737: 1735: 1732: 1730: 1727: 1726: 1724: 1720: 1710: 1707: 1705: 1702: 1700: 1697: 1695: 1692: 1691: 1689: 1685: 1679: 1676: 1674: 1671: 1669: 1666: 1664: 1661: 1659: 1656: 1654: 1651: 1649: 1646: 1644: 1641: 1639: 1636: 1634: 1631: 1629: 1626: 1624: 1621: 1619: 1616: 1614: 1611: 1609: 1606: 1604: 1601: 1599: 1596: 1594: 1591: 1590: 1588: 1586: 1582: 1579: 1575: 1565: 1562: 1560: 1557: 1555: 1552: 1550: 1549:J.S. 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Sisk 465:penstocks 374:peak load 329:(nominal) 99:July 2016 1530:Pumped- 1392:electric 1306:Natural 1227:Biomass 1200:storage 1198:Battery 1051:clui.org 637:Oroville 572:Antelope 471:Turbines 428:East of 416:(by the 392:Location 384:and the 303:Turbines 227:Owner(s) 160:Location 1687:Thermal 1554:O'Neill 1539:Castaic 1532:storage 1390:Hydro- 1374:Nuclear 1297:Mammoth 926:Related 647:Pyramid 632:O'Neill 587:Castaic 582:Bethany 443:forebay 424:, near 269:Creates 246:Creates 152:Country 83:scholar 1365:Valley 833:canals 790:Rivers 642:Perris 461:tunnel 430:Gorman 85:  78:  71:  64:  56:  1577:Solar 1544:Helms 988:(PDF) 981:LADWP 977:(PDF) 382:LADWP 325:1507 235:LADWP 90:JSTOR 76:books 1722:Wind 1282:Coso 1259:Coal 1229:(≥10 1202:(≥10 996:2019 831:and 564:Dams 231:CDWR 214:1966 62:news 1308:gas 1189:in 479:at 349:KWh 343:KWh 233:, 45:by 1766:: 1585:PV 1231:MW 1204:MW 1148:, 1131:, 1049:. 979:. 404:. 327:MW 166:, 1233:) 1206:) 1179:e 1172:t 1165:v 1152:. 1135:. 1059:. 1023:. 998:. 548:e 541:t 534:v 315:6 307:7 112:) 106:( 101:) 97:( 87:· 80:· 73:· 66:· 39:.

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Los Angeles County
California
34°35′14.32″N 118°39′23.88″W / 34.5873111°N 118.6566333°W / 34.5873111; -118.6566333
CDWR
LADWP
Pyramid Lake
Elderberry Forebay
Hydraulic head
Turbines
Installed capacity
MW
Annual generation
KWh
KWh
pumped-storage hydroelectric
Los Angeles Department of Water and Power
peak load
California State Aqueduct

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