General

• Vicinity Map
• Region (Map) ............. Pacific Northwest
• State (Map) .......................... Washington
• County .......................................... Benton
• Project ............................................ Yakima
• Dam type ................................... Diversion
• Location ..................... Near Prosser, WA
• Watercourse ....................... Yakima River
• Original Construction ....................... 1904
• Modified .......................... 1932-1933,1956
• National ID Number ................ WA01378
• Hydrologic Unit Code .......................

Dimensions

• Crest Elevation ................................ 633.5 ft
• Structural Height ................................. 9.0 ft
• Hydraulic Height ................................. 7.0 ft
• Crest Length ........................................... NA
• Weir Crest Length .......................... 661.0 ft
• Crest Width ............................................ NA
• Base Width ............................................. NA
• Volume ....................................... 2,500 cu yd

Hydraulics

• Spillway capacity at El. .......................         NA
• Diversion capacity ............................. 1,500 cfs

Headworks

• Concrete structure with three 16- by 7.75-ft top-seal radial gates.