|Location||Carbon County, Wyoming|
|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)|
|Length||530 ft (160 m)|
|Width (crest)||15 ft (4.6 m)|
|Width (base)||85 ft (26 m)|
|Dam volume||210,000 cu yd (160,000 m3)|
|Spillway type||Gated concrete tunnel|
|Spillway capacity||48,500 cu ft/s (1,370 m3/s)|
|Total capacity||1,017,279 acre⋅ft (1.254795×109 m3)|
|Catchment area||7,210 sq mi (18,700 km2)|
|Surface area||20,291 acres (8,211 ha)|
|Maximum water depth||206 ft (63 m)|
|Hydraulic head||166 ft (51 m)|
|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. 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.
This dam was first proposed in the 1930s as part of the Bureau of Reclamation's Kendrick Project, which would regulate the flow of the North Platte River in order to improve agriculture in the valleys surrounding Casper, Wyoming. Originally known as the Casper-Alcova Project, it was authorized by the National Industrial Recovery Act on June 16, 1933 in response to the Great Depression. The project was renamed the Kendrick Project on August 9, 1937 in honor of Wyoming politician John B. Kendrick.
In 1934, Winston Brothers Company and Associates won the construction contract of Seminoe Dam. Groundbreaking of the site was on February 20, 1936, with preliminary blasting and excavations. The diversion tunnel for the North Platte was completed on January 17, 1937, with one fatality, and by May of that year, a cofferdam was completed to a sufficient height to divert the river into the new channel. Concrete pouring began on January 19, 1938, and the last bucket was emptied on December 21, 1938. Water storage began on April 2, 1939, when the outlet tunnels were closed. The dam's power station was finished and the entire project was declared operational on August 3, 1939. A total of two deaths and several serious injuries resulted from the construction, and a pair of active faults that cut across the canyon near the dam site had to be excavated and filled in.
On March 25, 1969, a helicopter experienced engine problems and crashed into the rocky canyon near Seminoe dam killing Bureau of Reclamation employees David McMillan and Howard Leroy Gates. (Altoona Mirror, April 21, 1969)
When the project was first completed, it delivered water to just 600 acres (240 ha), but has progressed steadily, and by 1980 supplied irrigation water to 22,581 acres (9,138 ha) in the Casper valley.
The dam is suffering from a degrading Alkali–silica reaction that has damaged its structural integrity.
The Seminoe Reservoir is stocked with fish by the Wyoming Game and Fish Commission, and is open to boating and fishing, although access to the shoreline is limited and sometimes difficult due to the lack of development and distance from major cities.
Glen Canyon Dam is a concrete arch-gravity dam on the Colorado River in northern Arizona, United States, near the town of Page. The 710-foot (220 m) high dam was built by the U.S. Bureau of Reclamation (USBR) from 1956 to 1966 and forms Lake Powell, one of the largest man-made reservoirs in the U.S. with a capacity of 27 million acre-feet (33 km3). The dam is named for Glen Canyon, a series of deep sandstone gorges now flooded by the reservoir; Lake Powell is named for John Wesley Powell, who in 1869 led the first expedition to traverse the Colorado's Grand Canyon by boat.
The North Platte River is a major tributary of the Platte River and is approximately 716 miles (1,152 km) long, counting its many curves. In a straight line, it travels about 550 miles (890 km), along its course through the U.S. states of Colorado, Wyoming, and Nebraska.
New Melones Dam is an earth and rock filled embankment dam on the Stanislaus River, about 5 miles (8.0 km) west of Jamestown, California, United States, on the border of Calaveras County and Tuolumne County. The water impounded by the 625-foot (191 m)-tall dam forms New Melones Lake, California's fourth largest reservoir, in the foothills of the Sierra Nevada east of the San Joaquin Valley. The dam serves mainly for irrigation water supply, and also provides hydropower generation, flood control, and recreation benefits.
Friant Dam is a concrete gravity dam on the San Joaquin River in central California in the United States, on the boundary of Fresno and Madera Counties. It was built between 1937 and 1942 as part of a U.S. Bureau of Reclamation (USBR) water project to provide irrigation water to the southern San Joaquin Valley. The dam impounds Millerton Lake, a 4,900-acre (2,000 ha) reservoir about 15 miles (24 km) north of Fresno.
Pathfinder Dam is a masonry dam, located on the North Platte River, approximately 47 miles (76 km) southwest of Casper, Wyoming. It was originally constructed between 1905 and 1909 as part of the North Platte Project and has been modified several times since then. It is included on the National Register of Historic Places. Construction of the dam created Pathfinder Reservoir which provides water storage for 226,000 acres (910 km2) of irrigation in Wyoming and Nebraska. The dam is named for General John Charles Fremont, who had explored the area in 1842 and was nicknamed the "Pathfinder of the West."
Flaming Gorge Dam is a concrete thin-arch dam on the Green River, a major tributary of the Colorado River, in northern Utah in the United States. Flaming Gorge Dam forms the Flaming Gorge Reservoir, which extends 91 miles (146 km) into southern Wyoming, submerging four distinct gorges of the Green River. The dam is a major component of the Colorado River Storage Project, which stores and distributes upper Colorado River Basin water.
The Shoshone Project is an irrigation project in the U.S. state of Wyoming. The project provides irrigation for approximately 107,000 acres (430 km2) of crops in the Big Horn Basin, fulfilling the vision of local resident and developer Buffalo Bill Cody, who hoped to make the semi-arid basin into agricultural land. Buffalo Bill Dam on the Shoshone River impounds water for the project in Buffalo Bill Reservoir. In addition to its role in irrigation, the project provides flood control on the Shoshone and generates power, using the 350-foot (110 m) height of Buffalo Bill Dam, once a world record, and the considerable fall of the river through Shoshone Canyon to generate hydroelectric power. Chief crops in the Big Horn Basin are sugar beets, alfalfa, barley, oats, corn and beans.
Buffalo Bill State Park is a public recreation area surrounding the reservoir formed by the Buffalo Bill Dam, an impoundment of the Shoshone River, in Park County, Wyoming. The state park, reservoir and dam were named after William "Buffalo Bill" Cody, who founded the nearby town of Cody and who owned much of the land now occupied by the reservoir and park. The park offers camping, hiking, boating, fishing, and picnicking and is managed by Wyoming Division of State Parks and Historic Sites.
Buffalo Bill Dam is a concrete arch-gravity dam on the Shoshone River in the U.S. state of Wyoming. It is named after the famous Wild West figure William "Buffalo Bill" Cody, who founded the nearby town of Cody and owned much of the land now covered by the reservoir formed by its construction. The dam is part of the Shoshone Project, successor to several visionary schemes promoted by Cody to irrigate the Bighorn Basin and turn it from a semi-arid sagebrush-covered plain to productive agricultural land. Known at the time of its construction as Shoshone Dam, it was renamed in 1946 to honor Cody.
Glendo Reservoir is a reservoir located on the North Platte River in Platte County and Converse County in the U.S. State of Wyoming. The reservoir is formed by Glendo Dam. The earthfill dam is 2,096 feet (639 m) feet long and 190 feet (58 m) high and contains two hydroelectric turbines capable of generating 38 megawatts of power. The reservoir retains a maximum of 1,170,505 acre-feet (1.443797×109 m3) of water used primarily for irrigation and flood control.
Guernsey Dam is an earthfill dam on the North Platte River in Platte County in the U.S. State of Wyoming. The dam creates Guernsey Reservoir, the last of the 5 major reservoirs on the North Platte River in Wyoming. The dam contains a hydroelectric plant capable of 6.4 megawatts of electricity. The total capacity of the reservoir is 71,040 acre-feet (87,630,000 m3) of water which is used mainly for irrigation. Morrison-Knudsen and Utah Construction Company constructed Guernsey Dam and the hydroelectric plant as part of the North Platte Project to provide irrigation to eastern Wyoming and western Nebraska. Guernsey helps control the river flow and stores water released from the project's primary storage upstream at Pathfinder Reservoir. About 8 miles (13 km) downstream of the dam the Whalen Diversion Dam diverts water into the Fort Laramie and Interstate Canals that service farms in Wyoming and Nebraska.
The North Platte Project is an irrigation project in the U.S. states of Wyoming and Nebraska. The project provides irrigation service to about 335,000 acres (1,360 km2). The primary water storage for the project is in Pathfinder Reservoir in Wyoming. Downstream, Guernsey Dam manages river flow and provides secondary storage for water released from Pathfinder. Near Fort Laramie the Whalen Diversion Dam diverts water into Fort Laramie Canal and Interstate Canal which distribute water to farms in Wyoming and Nebraska.
The Boysen Dam is a rockfill dam on the Wind River in the U.S. state of Wyoming. The dam lies at the head of Wind River Canyon through the Owl Creek Mountains in western Wyoming and creates Boysen Reservoir. It is owned by the U.S. Bureau of Reclamation and furnishes irrigation water supply to the Bighorn Basin as well as providing flood control and hydroelectric power.
Alcova Dam is a 265-foot (81 m) tall zoned earthfill dam in central Wyoming, built in 1935-38 on the North Platte River and operated by the U.S. Bureau of Reclamation for water storage and hydroelectric power generation. The dam was built as part of the Kendrick Project, formerly the Casper-Alcova Project, whose central features are Alcova and Seminoe dams.
The San Juan–Chama Project is a U.S. Bureau of Reclamation interbasin water transfer project located in the states of New Mexico and Colorado in the United States. The project consists of a series of tunnels and diversions that take water from the drainage basin of the San Juan River – a tributary of the Colorado River – to supplement water resources in the Rio Grande watershed. The project furnishes water for irrigation and municipal water supply to cities along the Rio Grande including Albuquerque and Santa Fe.
Gibson Dam is a concrete arch dam on the Sun River, a tributary of the Missouri River, about 60 miles (97 km) west of Great Falls, Montana in the United States. Located on the eastern edge of the Rocky Mountains, the dam was built by the U.S. Bureau of Reclamation (USBR) between 1926 and 1929 as part of the Sun River Project to develop about 93,000 acres (38,000 ha) of irrigated land in the Sun River Valley.
Kortes Dam is a dam in Carbon County, Wyoming.
Heron Dam is a storage dam Rio Arriba County, in northern New Mexico in the southwestern United States, just north of the El Vado Dam. It is owned and operated by the United States Bureau of Reclamation. The dam is about 9 miles west of the town of Tierra Amarilla.