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612:. The diversion bypassed a canyon section of the Klamath River that historically consisted of some steep rapids. The dam was required to maintain a minimum release of 10 cu ft/s (0.28 m/s) to prevent this stretch from being entirely dewatered. Because it had no effective storage capacity, Dam No. 2 depended entirely on the regulated flows released from Copco Lake. The dam was demolished in 2023 during the Klamath River Renewal Project.
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On
January 23, 2024, the drawdown of water and sediment from Copco Lake was initiated via a detonation at the foot of Copco Number 1 Dam. The lake was expected to take three to four weeks to fully drain, at which point crews will plant native vegetation along the emerged riverbank. This was the final
355:(FERC). The plan was delayed in 2020 due to conditions placed on the project by FERC. In February 2022, the FERC released their final Environmental Impact Statement (EIS) on the dam's removal, and the dam was slated for removal in 2024. Copco 2 was demolished in 2023.
607:
located just below Dam No. 1. The dam diverted most of the flow of the river, about 2,400 to 2,500 cu ft/s (68 to 71 m/s), through a flume and tunnels to a 27 megawatt powerhouse 1.5 miles (2.4 km) downstream, on the upstream end of
367:
The lake was used for kayaking, fishing, swimming, windsurfing, power boating, and sailing. The surrounding area had facilities for picnicking and hiking. In the summer months, the lake often experienced large blooms of toxic
350:
As of
February 2016, the states of Oregon and California, the dam owners, federal regulators and other parties had reached an agreement to remove all four dams by the year 2020, pending approval by the
595:
owned the dam prior to its transfer to the
Klamath River Renewal Corporation in 2022. The dam is scheduled to be demolished in 2024 as part of the Klamath River Renewal Project.
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916:"FERC Staff Issues the Draft Environmental Impact Statement for the Hydropower License Surrender and Decommissioning of the Lower Klamath Project No. 14803 (P-14803-001)"
315:
Copco Lake was created by the construction of Copco Number 1 Dam. This dam was completed in 1922 by the
California Oregon Power Company (COPCO). COPCO was merged into
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Copco Number 1 Dam (National ID CA00323) is a gravity dam 415 feet (126 m) long and 132 feet (40 m) high, with 19.5 feet (5.9 m) of freeboard.
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of the four dams to be breached as part of the
Klamath River Renewal Project. Removal of the dam structure began in March 2024.
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The dam was breached in
January 2024 as a component of the Klamath River Renewal Project following decades of activism from the
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Klamath River, Beaver Creek, Raymond Gulch, Spannaus Gulch, Snackenburg Creek, Milk Creek, Parks Canyon, Indian Creek,
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https://www.usatoday.com/story/news/nation/2024/05/12/demolition-starts-iron-gate-dam-klamath-river-dams/73647405007/
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https://klamathrenewal.org/ferc-approves-license-surrender-and-decommissioning-of-the-lower-klamath-project-dams/
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in the 2020s as part of the
Klamath River Renewal Project. The social movement to
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890:"Agency throws curveball in largest US dam demolition plan along Oregon border"
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movement. The dam structure is planned to be fully removed by the end of 2024.
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1061:"WORld's LARGEST SALMON RESTORATION PROJECT UNDERWAY – Klamath River Renewal"
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1089:"Work on Copco No. 2 Dam Removal Comes to a Close – Klamath River Renewal"
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710:. California Department of Water Resources, Division of Safety of Dams
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777:"Dams Are Threatening California Salmon and a Native Tribe's Culture"
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876:"New plan to remove Klamath River dams without help from Congress"
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Copco Number 1 and Number 2 Dams were two of the four dams in the
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941:"Major hurdle cleared in plan to demolish 4 Klamath River dams"
705:"Dams Within the Jurisdiction of the State of California (A-G)"
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1075:"Copco No. 2: The dam produces power but no irrigation water"
1023:"Trying to Tame the Klamath River Filled It with Toxic Algae"
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rendering the water unsafe for human contact or consumption.
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The basin left by the draining of Copco Lake in spring 2024
1106:
COPCO LAKE Five Year Photos KLAMATH RIVER KLAMATH DAMS
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851:"Copco Lake: Homeowners worry as property values drop"
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804:. Gathard Engineering Consulting. November 2006
799:"Klamath River Dam and Sediment Investigation"
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296:, which was completed in 1922 as part of the
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966:"Fourth dam breached on the Klamath River"
730:"California Oregon Power Company or COPCO"
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1575:Reservoirs in Siskiyou County, California
622:List of dams and reservoirs in California
319:in 1961, and is now known as Pacificorp.
666:United States Department of the Interior
27:Reservoir in Siskiyou County, California
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922:. Federal Energy Regulatory Commission
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823:Fimrite, Peter (September 30, 2009).
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1595:2024 disestablishments in California
755:"Doctor's Orders: Undam the Klamath"
559:77,000 acre-feet (95,000,000 m)
353:Federal Energy Regulatory Commission
339:had been ongoing for over 20 years.
263:77,000 acre-feet (95,000,000 m)
1511:Klamath River Hydroelectric Project
657:Geographic Names Information System
569:4,300 square miles (11,000 km)
329:Klamath River Hydroelectric Project
298:Klamath River Hydroelectric Project
208:4,300 square miles (11,000 km)
538:70,312 cubic yards (53,757 m)
385:Dam in Siskiyou County, California
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1590:1922 establishments in California
1585:Reservoirs in Northern California
964:Neumann, Erik (24 January 2024).
849:Aschbrenner, Joel (Mar 8, 2012).
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787:from the original on 2020-10-23.
765:from the original on 2011-05-18.
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603:Copco Number 2 Dam was a gated
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280:was an artificial lake on the
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825:"Deal to raze 4 Klamath dams"
753:Hartel, Diana (25 May 2011).
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106:Show map of the United States
519:Elevation at crest
1404:Lava Beds National Monument
1344:Course of the Klamath River
627:List of lakes in California
417:Siskiyou County, California
286:Siskiyou County, California
120:Siskiyou County, California
1611:
1554:California State Route 169
1394:Six Rivers National Forest
585:1,200 yards (1,100 m)
239:1,200 yards (1,100 m)
1549:California State Route 96
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247:1,000 acres (400 ha)
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1580:Reservoirs in California
1496:Dams and infrastructure
1399:Klamath National Forest
1002:"Copco lake - Kayaking"
829:San Francisco Chronicle
522:2,613 feet (796 m)
317:Pacific Power and Light
271:2,605 feet (794 m)
44:Copco Lake in the 1990s
1413:Native American tribes
444:41.98000°N 122.33444°W
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149:41.97944°N 122.30361°W
76:Show map of California
577:3 miles (4.8 km)
514:415 feet (126 m)
484:Type of dam
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231:3 miles (4.8 km)
1466:Hudson's Bay Company
1461:California Gold Rush
894:The Associated Press
506:132 feet (40 m)
449:41.98000; -122.33444
154:41.97944; -122.30361
1077:. 16 February 2012.
1028:Scientific American
783:. 22 October 2020.
610:Iron Gate Reservoir
574:Maximum length
565:Catchment area
556:Total capacity
530:9 feet (2.7 m)
440: /
255:77 feet (23 m)
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1354:Lower Klamath Lake
1349:Upper Klamath Lake
1245:Significant cities
878:. 3 February 2016.
599:Copco Number 2 Dam
582:Maximum width
527:Width (crest)
391:Copco Number 1 Dam
381:Copco Number 1 Dam
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337:Un-Dam the Klamath
305:Un-Dam the Klamath
294:Copco Number 1 Dam
18:Copco Number 2 Dam
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1477:Klamath Diversion
1379:Klamath Mountains
1286:Major tributaries
759:High Country News
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460:Opening date
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896:. Jul 17, 2020
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1539:Copco Dam #2
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1534:Copco Dam #1
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1514:(PacifiCorp)
1384:Trinity Alps
1374:Mount Shasta
1369:Trinity Lake
1323:Salmon River
1313:Shasta River
1272:Klamath Glen
1222:
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1208:
1201:
1194:
1180:
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1166:
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1069:
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1032:. Retrieved
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1007:December 21,
1005:. Retrieved
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924:. Retrieved
920:www.ferc.gov
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860:December 21,
858:. Retrieved
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834:December 21,
832:. Retrieved
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808:December 21,
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793:
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738:December 21,
736:. Retrieved
724:
714:December 21,
712:. Retrieved
655:
652:"Copco Lake"
602:
590:
366:
357:
349:
326:
314:
302:
293:
277:
276:
260:Water volume
244:Surface area
1318:Scott River
1308:Butte Creek
447: /
435:122°20′04″W
423:Coordinates
331:which were
323:Dam removal
288:, near the
228:Max. length
152: /
140:122°18′13″W
127:Coordinates
1569:Categories
1303:Lost River
1257:Happy Camp
1190:California
1034:August 10,
975:8 February
950:2022-04-30
926:2022-04-30
633:References
593:PacifiCorp
472:PacifiCorp
432:41°58′48″N
363:Recreation
278:Copco Lake
236:Max. width
137:41°58′46″N
100:Copco Lake
70:Copco Lake
33:Copco Lake
1482:Modoc War
1473:(defunct)
1359:Tule Lake
1337:Geography
1262:Weitchpec
1224:Del Norte
781:VICE News
543:Reservoir
171:reservoir
1524:Keno Dam
1210:Humboldt
1196:Siskiyou
1154:counties
785:Archived
763:Archived
616:See also
493:Impounds
468:Owner(s)
413:Location
116:Location
1454:History
1435:Klamath
1277:Klamath
1267:Orleans
1217:Trinity
1182:Jackson
1168:Klamath
548:Creates
488:Gravity
405:Country
333:removed
311:History
1162:Oregon
1150:States
900:20 Jul
511:Length
503:Height
290:Oregon
1445:Yurok
1440:Modoc
1430:Karuk
1203:Modoc
802:(PDF)
733:(PDF)
708:(PDF)
214:Basin
1425:Hupa
1175:Lake
1152:and
1036:2020
1009:2012
977:2024
902:2020
862:2012
836:2012
810:2012
740:2012
716:2012
463:1922
376:Dams
166:Type
970:opb
945:opb
284:in
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20:)
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