Utter Dam is an earth dam located in San Juan County, Washington, built in 1971. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 335 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Utter Dam
The primary purpose of Utter Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Eagle Lake Community Association (private). It impounds the Tr-rosario Strai.
The dam stands 16 feet tall and stretches 335 feet across, creates a reservoir covering 73 acres, has a maximum storage capacity of 98 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1971, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 01/06/2000. That was over 26 years ago.
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Location
| State | Washington |
| County | San Juan |
| River/Stream | Tr-rosario Strai |
| Coordinates | 48.66341, -122.77160 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Length | 335 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 73 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 57 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Eagle Lake Community Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/06/2000 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00127 |
| Federal ID | WA00127 |
| More Info | State Dam Safety Program |