Location

Potholes Reservoir and O'Sullivan Dam (POT)

O'Sullivan Dam, one of the larger zoned earthfill dams in the United States, is on Crab Creek about 13 miles west of Warden, Washington. Potholes Reservoir, which is formed by this dam, collects return flows from all irrigation in the upper portion of the project for reuse in the southern portion. The dam was constructed from 1947 to 1949. Columbia Basin Teletype (CBTT) = POT.
Location Tags Potholes Reservoir, O'Sullivan Dam
Location Parent
State(s) Washington
Unified Region(s) Columbia-Pacific Northwest
Reclamation Region(s) (Legacy) Pacific Northwest
Timezone PT
Elevation 1,055 ft
Vertical Datum NAVD88
Coordinates (lat, long) (46.9831158, -119.2755127)
Horizontal Datum WGS84
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