Grassy Lake Dam is a small dam operated by the U.S. Bureau of Reclamation in Teton County, Wyoming, immediately to the south of Yellowstone National Park. The dam lies in a corridor of Bridger-Teton National Forest that runs between Yellowstone and Grand Teton National Parks. The dam structure and outlets are within a few hundred feet of the south boundary of Yellowstone. The zoned earthfill dam was built between 1937 and 1939 as part of the Minidoka Project, which provides water to irrigate farmland in Idaho's Snake River Plain. The dam provides only water storage, impounding . Given the small catchment area of Grassy Creek, inflow is augmented by a ditch that moves water from Cascade Creek into the reservoir.
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Grassy Lake Road Designated Campsites
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Parking
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Pets Allowed
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Restrooms
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Wifi
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Wheelchair Accessible
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Credit Cards Accepted
- Max Stay
- 14
- Affiliation
- National forest
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Fifty Amp
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Tent Sites
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Full Hookup
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Paved Sites
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Sewer Hookup
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Water Hookup
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Standard Tent Sites
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