General

• Region (Map) : .................. Pacific Northwest
• State (Map) ......................... Washington
• County ................................ Grant
• Project: ................................ Columbia Basin
• Dam type: ........................... Zoned Earthfill
• Location: ............................ 2.5mi NE of Stratford
• Watercourse: ..................... Offstream Storage
• Reservoir: ........................... Billy Clapp Lake
• Construction Date: ............1946-1948
• National ID Number .......... WA00269
• Hydrologic Unit Code ......

Dimensions

• Crest Elevation of Dam: .................... 1351.00 ft
• Structural Height of Dam: ................... 130.00 ft
• Crest Length: ...................................... 1900.00 ft
• Top of Joint Use: .......................................... NA
• Top of Active Conservation: ............1335.00 ft
• Top of Inactive Conservation: ......... 1312.76 ft
• Spillway Crest: .................................... 1336.00 ft
• Top of Dead Storage: ........................ 1244.00 ft
• Streambed at Dam Axis : .............................. NA

Hydraulics

• Normal Water Surface Elev: ............... 1335.0 ft
• Hydraulic Height: .................................... 86.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ................................Yes
•    Morning-Glory ............................................ No
•    Crest Length    ..................................... 150.0 ft
•    Gated      ....................................................... No
•    Capacity at Elev: 1343.6 ft,                9,300 cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   .................................... NA
• Outlet Works Capacity at
•     Elevation  1343.6 ft.,  ....................... 1,000 cfs

Hydrology

• Drainage Area: ................................... 190.0 sq mi
• Hydrometeorological Report                  HMR 57
• Flood Type: .................................... June General
• Storm Duration: .........................................  72 hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ....................................... 27,700 cfs
•   Inflow Volume: .......................... 143,900 acre-ft
•   Flow Duration: .........................................8 days
•   PMF Routing MWS Elev.: .......................... NA
•   Initial Routing Elev: .............................1335.0 ft
•   Study Date: ......................................... July 1993