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General
Vicinity Map
Region (Map) ............. Pacific Northwest
State (Map) ......................... Washington
County ........................................... Yakima
Project ............................................ Yakima
Dam type ................. Concrete thick arch
Location ........... 48 mi W of Yakima, WA
Watercourse ....................... Tieton River
Reservoir ................................. Clear Lake
Original construction ....................... 1914
Modified .............. 1918, 1964, 1990, 1993
National ID Number ............... WA00264
Hydrologic Unit Code .................. |
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Hydraulics
Total storage to
El. 3013.0 ............................. 5,300 acre-ft
Service spillway
Capacity at El. 3015 ................. 2,400 cfs
Dam crest
Capacity at El. 3020 ............... 11,530 cfs
36-inch Outlet works
Capacity at El. 3011 (both gates) ... 612 cfs
48-inch Outlet works
Capacity at El. 3011 .................... 467 cfs
18-inch Fish bypass
Capacity at El. 3011 ...................... 66 cfs |
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Dimensions
Crest Elevation .................................. 3015 ft
Structural Height ................................... 84 ft
Hydraulic Height ................................... 57 ft
Crest Length ........................................ 404 ft
(210 ft at El. 3015, 194 ft at El. 3016)
Crest Width .................................. 3 ft & 5 ft
Base Width ............................................ 54 ft
Volume of Concrete
Original Arch ......................... 6,000 cu yd
Downstream Buttress ............ 7,000 cu yd |
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Hydrology
Drainage area ................................. 60 sq mi
Hydrometeorological Report ............... NA
PMF . 1984 General rain-on-frozen ground
Volume .......... 58,200 acre-feet over 7 days
Peak inflow .................................. 36,450 cfs
Maximum water surface ............. 3022.09 ft |
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