General

• Region (Map) : ................... Great Plains
• State (Map) ........................ Wyoming
• County ................................ Fremont
• Project: .................................PSMBP-Boysen Unit
• Dam type: ........................... Earthfill
• Location: ............................ 20 mi S Thermopolis
• Watercourse: ..................... Wind/Bighorn Rivers
• Reservoir: ........................... Boysen
• Construction Date: ............1947-1952
• National ID Number .......... WY01299
• Hydrologic Unit Code .....

Dimensions

• Crest Elevation of Dam: ...................... 4758.0 ft
• Structural Height of Dam: ...................   220.0 ft
• Crest Length: ........................................ 1143.0 ft
• Top of Joint Use: ................................. 4725.0 ft
• Top of Active Conservation: ............. 4717.0 ft
• Top of Inactive Conservation: ........... 4685.0 ft
• Spillway Crest: ...................................... 4700.0 ft
• Top of Dead Storage: .......................... 4657.0 ft
• Streambed at Dam Axis : ..................... 4608.0 ft

Hydraulics

• Normal Water Surface Elev: ................4717.0 ft
• Hydraulic Height: .................................. 117.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ................................ No
•    Morning-Glory ........................................... No
•    Crest Length    ..........................................  NA
•    Gated      ..................................................... Yes
•    Capacity at Elev:  4725.0  ft,            25,000 cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   .................................. 0  cfs
• Outlet Works Capacity at
•     Elevation  0.0 ft.,  ...................................... NA

Hydrology

• Drainage Area: ..................................7,700 sq mi
• Hydrometeorological Report                HMR 55
• Flood Type: .........................April-June General
• Storm Duration: ........................................ 72 hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ................................... 845,000 cfs
•   Inflow Volume: ......................2,820,000 acre-ft
•   Flow Duration: .....................................15 days
•   PMF Routing MWS Elev.: ...................     NA
•   Initial Routing Elev: ...........................4717.0 ft
•   Study Date: ................................ October 1988