Rio Mount Dam, located in Snohomish, Washington, is a private earth dam completed in 1979 with a primary purpose of recreation.
Wind
Humidity
The dam, standing at 20 feet tall with a hydraulic height of 22 feet, impounds water from the Tr-Stillaguamish River, creating a 60 acre-foot reservoir for recreational activities. The dam has a low hazard potential and is currently not rated for its condition.
Managed by the Washington Department of Ecology, Rio Mount Dam is state regulated, permitted, inspected, and enforced. It falls under the jurisdiction of Congressional District 01 and is represented by Suzan K. DelBene (D). With a drainage area of 1.14 square miles and a maximum discharge of 80 cubic feet per second, the dam provides both flood control and water storage benefits to the surrounding area. For water resource and climate enthusiasts, Rio Mount Dam serves as a unique case study in private dam ownership and management for recreation purposes.
Year Completed |
1979 |
Dam Length |
300 |
River Or Stream |
Tr-Stillaguamish River |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
22 |
Drainage Area |
1.14 |
Nid Storage |
60 |
Structural Height |
20 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
| Location | Reservations | Toilets |
|---|---|---|
River Meadows County Park
|
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Wenberg County Park
|
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Kayak Point Regional Park
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Steelhead Group Camp
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Meadow Fields Camp Site
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Grouse Camp Site
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