General

• Region (Map) : ................... Great Plains
• State (Map) .......................  Montana
• County ................................ Beaverhead
• Project: ................................ PSMBP-East Bench
• Dam type: ........................... Earthfill
• Location: ............................ 20mi SW of Dillion
• Watercourse: ..................... Beaverhead River
• Reservoir: ........................... Clark Canyon
• Construction Date: ............1961-1964
• National ID Number .......... MT00569
• Hydrologic Unit Code .......

Dimensions

• Crest Elevation of Dam: ...................... 5578.0 ft
• Structural Height of Dam: ....................  147.0 ft
• Crest Length: ........................................ 2950.0 ft
• Top of Joint Use: ................................. 5546.1 ft
• Top of Active Conservation: ............. 5535.7 ft
• Top of Inactive Conservation: ........... 5470.6 ft
• Spillway Crest: ...................................... 5560.4 ft
• Top of Dead Storage: .......................... 5455.0 ft
• Streambed at Dam Axis : ..................... 5446.5 ft

Hydraulics

• Normal Water Surface Elev: ...............5535.7 ft
• Hydraulic Height: ................................. 113.9 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ...............................Yes
•    Morning-Glory ........................................... No
•    Crest Length    ......................................... 67 ft
•    Gated      ...................................................... No
•    Capacity at Elev:  5571.9  ft,             9,520 cfs
• Auxiliary Spillway ........................................ No
•     Capacity at Elev.   .................................. 0 cfs
• Outlet Works Capacity at
•     Elevation  5547.0 ft.,  ....................... 2,325 cfs 

Hydrology

• Drainage Area: .................................2,315 sq mi
• Hydrometeorological Report               HMR 55
• Flood Type: ...............................Winter General
• Storm Duration: ....................................... 72 hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ............................. ..... 166,800 cfs
•   Inflow Volume: ........................ 361,900 acre-ft
•   Flow Duration: .....................................30 days
•   PMF Routing MWS Elev.: ............... 5535.7 ft
•   Initial Routing Elev: .......................... 5535.7 ft
•   Study Date: ....................................... July 1985