Editing Central Valley Project (section)

=== American River ===
[[File:Folsom dam usbr.jpg|thumb|right|Folsom Dam spilling during a flood]]
The American River Division is located in north-central California, on the east side of the Great Central Valley. Its structures use the water of the [[American River]], which drains off the [[Sierra Nevada (U.S.)|Sierra Nevada]] and flows into the [[Sacramento River]]. The division is further divided into three units: the Folsom, Sly Park and Auburn-Folsom South. The American River Division stores water in the American River watershed, to both provide water supply for local settlements, and supply it to the rest of the system. The dams also are an important flood control measure. [[Hydroelectricity]] is generated at Folsom and Nimbus dams, and marketed to the [[Western Area Power Administration]].<ref name="folsomslypark">{{cite web |url=http://www.usbr.gov/projects/Project.jsp?proj_Name=Folsom%20and%20Sly%20Park%20Units%20Project |title=Folsom and Sly Park Units |publisher=U.S. Bureau of Reclamation |work=Central Valley Project |date=2009-09-01 |access-date=2010-01-16 |archive-url=https://web.archive.org/web/20111112081743/http://www.usbr.gov/projects/Project.jsp?proj_Name=Folsom%20and%20Sly%20Park%20Units%20Project |archive-date=November 12, 2011 |url-status=dead }}</ref>

The Folsom Unit consists of [[Folsom Dam]], its primary water storage component, and [[Nimbus Dam]], which serves as its downstream forebay.<ref name="folsomslypark"/> The Folsom Dam is located on the American River, and stores {{convert|1010000|acre.ft|dam3}} of water in its reservoir, [[Folsom Lake]]. Folsom Lake covers {{convert|11550|acre}} and is located inside the [[Folsom Lake State Recreational Area]].<ref name="Folsom">{{cite web |url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Folsom%20Dam |title=Folsom Dam |publisher=U.S. Bureau of Reclamation |work=American River Division |date=2009-06-04 |access-date=2010-01-16 |archive-date=June 13, 2011 |archive-url=https://web.archive.org/web/20110613135900/http://www.usbr.gov/projects/Facility.jsp?fac_Name=Folsom%20Dam |url-status=dead }}</ref> Eight additional earth fill saddle dams are required to keep the reservoir from overflowing. The dam also generates 200 MW from three generators.<ref>{{cite web|url=http://www.usbr.gov/power/data/sites/folsom/folsom.html|title=Folsom Powerplant|publisher=U.S. Bureau of Reclamation|access-date=2009-04-11|archive-url = https://web.archive.org/web/20080303233602/http://www.usbr.gov/power/data/sites/folsom/folsom.html |archive-date = March 3, 2008|url-status=dead}}</ref> About {{convert|7|mi|abbr=on}} downstream of Folsom Dam is the [[Nimbus Dam]], forming [[Lake Natoma]].<ref name="Nimbus">{{cite web |url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Nimbus+Dam&groupName=General |title=Nimbus Dam |publisher=U.S. Bureau of Reclamation |work=American River Division |date=2009-06-04 |access-date=2010-01-16}}</ref> The dam generates 7.7 MW from two [[Kaplan turbine]]s on the north side of the river. The ''[[Nimbus Fish Hatchery]]'' is located downstream of Nimbus Dam, to compensate for the two dams' destruction of American River spawning grounds.<ref>{{cite web|url=http://www.recreation.gov/detail.cfm?ID=26 |title=Nimbus Fish Hatchery |url-status=dead |archive-url=https://web.archive.org/web/20060926044213/http://www.recreation.gov/detail.cfm?ID=26 |archive-date=September 26, 2006 }}</ref>

[[File:Slyparkdam.jpg|thumb|right|Sly Park Dam (left) and auxiliary dam (right)]]
The Sly Park Unit includes [[Sly Park Dam]], Jenkinson Lake, the Camp Creek Diversion Dam, and two diversion tunnels. The Sly Park Dam and its similarly-sized auxiliary dam form Jenkinson Lake, which covers {{convert|650|acre}}.<ref name="SlyPark">{{cite web |url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Sly+Park+Dam&groupName=Overview |title=Sly Park Dam |publisher=U.S. Bureau of Reclamation |work=American River Division |date=2009-06-04 |access-date=2010-01-16 |archive-date=June 13, 2011 |archive-url=https://web.archive.org/web/20110613135921/http://www.usbr.gov/projects/Facility.jsp?fac_Name=Sly+Park+Dam&groupName=Overview |url-status=dead }}</ref> Jenkinson Lake feeds the Camino Conduit, a {{convert|5|mi|abbr=on}} [[aqueduct (watercourse)|aqueduct]].<ref name="folsomslypark"/> The Camp Creek Diversion Dam diverts some water from Camp Creek into Jenkinson Lake.<ref name="CampCreek">{{cite web |url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Camp+Creek+Diversion+Dam |title=Camp Creek Diversion Dam |publisher=U.S. Bureau of Reclamation |work=American River Division |date=2009-06-04 |access-date=2010-01-16 |archive-date=June 13, 2011 |archive-url=https://web.archive.org/web/20110613135937/http://www.usbr.gov/projects/Facility.jsp?fac_Name=Camp+Creek+Diversion+Dam |url-status=dead }}</ref>

The third unit is the [[Auburn-Folsom South Unit]], consisting of several dams on American River tributaries. These include [[Sugar Pine Dam]] and Pipeline (supplying water to [[Foresthill, California|Foresthill]]), and the uncompleted Folsom South Canal.<ref name="auburnfolsom">{{cite web |url=http://www.usbr.gov/projects/Project.jsp?proj_Name=Auburn-Folsom%20South%20Unit%20Project |title=Auburn-Folsom South Unit |publisher=U.S. Bureau of Reclamation |author=Central Valley Project |date=2009-08-31 |access-date=2010-01-16 |archive-url=https://web.archive.org/web/20120921004246/http://www.usbr.gov/projects/Project.jsp?proj_Name=Auburn-Folsom%20South%20Unit%20Project |archive-date=September 21, 2012 |url-status=dead }}</ref> The primary component of the unit, concrete thin-arch [[Auburn Dam]], was to be located on the North Fork of the American, but was never built because of the significant risk of earthquakes in the area, and general public opposition to the project.<ref>{{cite web|url=http://www.geoengineer.org/auburn.htm|title=Auburn Dam|publisher=geoengineer.org|access-date=2009-04-11}}</ref> However, the high [[Foresthill Bridge]], built as part of the preliminary work for Auburn Dam, still stands. County Line Dam, about {{convert|10|mi|km}} south of Folsom Dam, was also never built.<ref name="auburnfolsom"/>