Glendo Dam


Glendo Dam is a zoned earthfill structure on the North Platte River about 4.5 miles southeast of Glendo. The embankment has a structural height of 190 feet and a length of 2,096 feet along the crest. About 2,440 feet of dikes are required across a low area on the south side of the reservoir 1.5 miles west of the dam. The dam forms a reservoir 14 miles in length, having a total capacity of 789,402 acre-feet at water surface elevation 4653, the top of the flood control capacity. Space is provided in the reservoir for storing 115,000 acre-feet of sediment, an estimated 100-year accumulation. There are 454,337 acre-feet allotted for irrigation and power and 271,917 acre-feet for flood control. In addition, a surcharge capacity of 329,251 acre-feet is available. These capacities differ slightly from the original storage allocations because of sediment accumulation.

An uncontrolled concrete spillway 45 feet wide is located about 450 feet north of the right abutment of the dam. The Glendo Powerplant is joined to the Glendo Reservoir by a diversion tunnel 21 feet in diameter and 2,100 feet long. The plant contains two units having a maximum rated head of 130 feet. Each unit has an installed capacity of 12,000 kilowatts.

RegionFacilities in Great Plains | Great Plains Home Page
ProjectPSMBP-Glendo Unit
Dam Type
WatercourseNorth Platte River
Net Generation55,640,430 kWh
Original Construction1955-1958
Modified Construction
National ID NumberWY01291
Hydrologic Unit Code

Structural Height190.0 ft
Hydraulic Height (Normal Operating Depth at Dam)145.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation4653.0 ft
Crest Elevation4675.0 ft
Crest Length
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis4508.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)4635.0 ft
Top of Inactive Conservation Pool (Elevation)4570.0 ft
Top of Dead Storage Pool (Elevation)4545.0 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation10335 cfs at 4669.0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation13000.0 cfs at 4669.0 ft
Diversion Capacity at Elevation
Drainage Area4300 sq mi
Hydrometeorological Report (HMR)HMR 55A
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Manager
OrganizationWyoming Area Office
AddressP.O. Box 1630
CityMills, WY 82644
Phone (Office)307 261-5671
TitleArea Manager
OrganizationWyoming Area Office
AddressP.O. Box 1630
CityMills, WY 82644
Phone (Office)307 261-5671

Last updated: Mar 29, 2013