Seminoe Dam

Seminoe Dam
Spillways full open following heavy snowmelt, June 2011
Location of Seminoe Dam in Wyoming
Country	United States
Location	Carbon County, Wyoming
Coordinates	42°09′21″N 106°54′30″W / 42.15583°N 106.90833°W / 42.15583; -106.90833
Status	In use
Construction began	1936
Opening date	1939
Owner(s)	U.S. Bureau of Reclamation
Dam and spillways
Type of dam	Concrete thick gravity-arch
Impounds	North Platte River
Height	295 ft (90 m)[1]
Length	530 ft (160 m)[1]
Width (crest)	15 ft (4.6 m)[1]
Width (base)	85 ft (26 m)
Dam volume	210,000 cu yd (160,000 m3)[1]
Spillways	1
Spillway type	Gated concrete tunnel
Spillway capacity	48,500 cu ft/s (1,370 m3/s)[2]
Reservoir
Creates	Seminoe Reservoir
Total capacity	1,017,279 acre⋅ft (1.254795×109 m3)[2]
Catchment area	7,210 sq mi (18,700 km2)[2]
Surface area	20,291 acres (8,211 ha)
Maximum water depth	206 ft (63 m)[1]
Power Station
Hydraulic head	166 ft (51 m)[3]
Turbines	3x 15 MW
Installed capacity	45 MW
Annual generation	96,406,970 KWh (2007)

Seminoe Dam is a concrete thick-arch dam on the North Platte River in the U.S. state of Wyoming. The dam stores water for irrigation and hydroelectricity generation and is owned and operated by the U.S. Bureau of Reclamation. It is the uppermost dam on the North Platte River and is located directly upstream from the Kortes Dam. It lies in a narrow, isolated canyon formed by the North Platte cutting through the Seminoe Mountains about 40 miles (64 km) northeast of Rawlins. The 295-foot (90 m) dam forms Seminoe Reservoir, which covers more than 20,000 acres (8,100 ha) when full.^[4] Seminoe State Park is adjacent to the reservoir. The small village of Seminoe Dam abuts the dam and reservoir and provides residence for the dam attendants and park services personnel.