Alcova Dam

Alcova Dam is on the North Platte River about 37 miles downstream from Seminoe Dam and 10 miles downstream from Pathfinder Dam of the North Platte Project. The dam forms a reservoir from which water is diverted into Casper Canal for irrigation of lands in the Kendrick Project. The dam is a zoned earthfill structure rising 265 feet above its foundation, and containing 1,635,000 cubic yards of material. Water is released for other irrigation rights downstream through the Alcova Powerplant or over a controlled spillway. Alcova Powerplant was authorized and built after the completion of Alcova Dam. It is on the right bank of the river opposite the toe of the dam. The plant uses the 165-foot drop from the reservoir to the river for power generation. It consists of two units, each an 18,000-kilowatt vertical-shaft generator driven by a 26,500-horsepower turbine. The reservoir has a total capacity of 184,405 acre-feet, of which only the top 30,606 acre-feet is active capacity available for irrigation.

RegionFacilities in Great Plains | Great Plains Home Page
Dam Type zoned earthfill
WatercourseNorth Platte River
Location 30 miles southwest of Casper, WY
Net GenerationExceeds 100,000,000 kWh annually
Original Construction1935-1938
Modified Construction Powerplant added at base of dam in 1955
National ID NumberWY01290
Hydrologic Unit Code

Structural Height265.00 ft
Hydraulic Height (Normal Operating Depth at Dam)180.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation5460.00 ft
Crest Elevation5510.0 ft
Crest Length763,00 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis5325.00 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)5500.00 ft
Top of Inactive Conservation Pool (Elevation)5487.00 ft
Top of Dead Storage Pool (Elevation)5334.00 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation5500 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation55000 cfs at 5500.0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation2950 cfs at 5498.0 ft
Diversion Capacity at Elevation
Drainage Area65.0 sq mi
Hydrometeorological Report (HMR)HMR 43
Probable Maximum Flood (PMF) Report

Contact Information
TitleFacility Manager
OrganizationNorth Platte Projects Field Office
Address22122 Kortes Road
CityAlcova, WY 82620
Phone (Office)307-261-5960
TitleFacility Manager
OrganizationNorth Platte Projects Field Office
Address22122 Kortes Road
CityAlcova, WY 82620
Phone (Office)307-261-5960

Last updated: May 31, 2013