One hundred eighty miles below Alcova Dam and 25 miles below Glendo Dam, the Guernsey Dam controls river flow. Water released from Pathfinder Reservoir can be stored and released to fit varying irrigation demands. Water is released through the Guernsey Powerplant.
Guernsey Dam is in a rocky canyon 2 miles upstream from Guernsey, Wyo. It is a diaphragm-type embankment of sluiced clay, sand and gravel that forms an impervious core. Its slopes are protected by a thick layer of rock riprap. The structural height of the dam is 135 feet. The original capacity of the reservoir was 73,810 acre-feet, but this has been greatly reduced by silt deposits. The powerplant is on the right bank below the dam and has two 2,400-kilowatt generators. Power is transmitted to towns and industries down the valley over project and other interconnected transmission system lines.
General
Project
North Platte
Latitude
42.2903
Watercourse
North Platte River
Original Construction
1925-1927
Longitude
-104.7631
Reservoir
Guernsey
National ID Number
WY01293
Dimensions
Structural Height
135.0 ft
Crest Length
560.0 ft
Top of Active Conservation Pool (Elevation)
4420.0 ft
Top of Inactive Conservation Pool (Elevation)
4370.0 ft
Crest Elevation
4430.0 ft
Hydraulic Height (Normal Operating Depth at Dam)
92.0 ft
Hydraulics & Hydrology
Spillway Capacity at Elevation
52000.0 cfs at 4420.0 ft
Auxiliary Spillway
No
Drainage Area
2145.0 sq mi
Hydrometeorological Report (HMR)
HMR
Normal Water Surface Elevation
4420.0 ft
Net Generation
12,108,622 kWh
Contact
Owner
Title: Facility Manager Organization: North Platte Projects Field Office Address: 22122 Kortes Road City: Alcova, WY 82620 Phone: 307-261-5960
Operator
Title: Facility Manager Organization: North Platte Projects Field Office Address: 22122 Kortes Road City: Alcova, WY 82620 Phone: 307-261-5960
More Information about the U.S. Bureau of Reclamation
