Eastern Washington Sights

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Potholes Reservoir

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Potholes Reservoir Review

An artificial lake in a natural depression carved by the huge Spokane Floods, the reservoir's waters are contained by O'Sullivan Dam, one of the country's largest earth-filled dams.

    Contact Information

  • Address: Hwy. 17 to Hwy. 170, Moses Lake, WA, 99344
  • Phone: 509/765-6641
  • Cost: Discover Pass (valid at all state parks) $10 per day or $30 for a year
  • Hours: Daily 24 hrs
  • Website: wdfw.wa.gov
  • Location: Moses Lake
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