O'Sullivan Dam is the largest earthfill dam in the United States, more than three and a half miles long.
Location:
Othello Washington
(Moses Lake) Grant County Fair
(Othello) O'Sullivan Dam
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01/08 Coming to The Othello area
Apple Blossom Festival Wenatchee WA April1-May5 A delicious part of the Apple Blossom Festival is the Washington State Apple Blossom Festival Food Fair.
Leavenworth Spring Bird Fest Leavenworth WA May16-19 Learn about the wide variety of migratory birds that come here for a brief, but important part of their year: the breeding season. Hear the songs sung only during the breeding season.
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