Pinto Dam

Overview

Pinto Dam is located just north of Highway 28 in the eastern portion of Grant County. Pinto Dam forms Billy Clapp Lake, an off-stream reservoir which stores water for the Columbia Basin Irrigation Project. The nearest towns are Stratford and Wilson Creek. Just north of the dam is a boat launch and sandy beach area that allows access to Billy Clapp Lake. The Main Canal begins at the headworks at Dry Falls Dam and consists of unlined and concrete-lined sections. Total length of the canal, including siphons, tunnels, and Billy Clapp Lake is 18.4 miles. The first 1.8 miles from Dry Falls Dam to the Bacon Siphon and Tunnel structures has been increased in capacity from 13,200 to 19,300 cubic feet per second. Bacon Siphon and Tunnel structures consist of two siphons, each about 1,000 feet long, and two tunnels, each about 2 miles long, that carry the water to Billy Clapp Lake.


General
RegionFacilities in Pacific Northwest | Pacific Northwest Home Page
StateWashington
CountyGrant
ProjectColumbia Basin
Dam TypeZoned Earthfill
ReservoirBilly Clapp Lake
WatercourseOffstream Storage
Location
Longitude-119.2533
Latitude47.4483
Original Construction1946-1948
Modified Construction
National ID NumberWA00269
Hydrologic Unit Code

Dimensions
Structural Height130.0 ft
Hydraulic Height (Normal Operating Depth at Dam)101.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation1346.8 ft
Crest Elevation1351.0 ft
Crest Length1900.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis1335.0 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)1335.0 ft
Top of Inactive Conservation Pool (Elevation)1312.76 ft
Top of Dead Storage Pool (Elevation)1244.00 ft

Hydraulics & Hydrology
Total Water Storage at Elevation21,200 ac-ft
Maximum Water Surface Elevation
Normal Water Surface Elevation1335.0 ft
Spillway TypeUngated
Auxiliary SpillwayNo
Spillway Capacity at Elevation9,300 cfs at 1346.8 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation1,000 cfs at 1343.6 ft
Diversion Capacity at Elevation9,700 cfs
Drainage Area190.0 sq mi
Hydrometeorological Report (HMR)HMR 57
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationColumbia-Cascades Area Office
Address1917 Marsh Road
CityYakima, WA 98901-2058
Phone (Fax)509 454-5611
Phone (Office)509 575-5848 x202
Operator
TitleArea Office Manager
OrganizationColumbia-Cascades Area Office
Address1917 Marsh Road
CityYakima, WA 98901-2058
Phone (Fax)509 454-5611
Phone (Office)509 575-5848 x202


Last updated: Apr 30, 2009