Durhack Dam No 4 is an earth dam located in San Juan County, Washington, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 184 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 Durhack Dam No 4
The primary purpose of Durhack Dam No 4 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lakedale Resort (private). It impounds the Tr-rocky Bay.
The dam stands 21 feet tall and stretches 184 feet across, creates a reservoir covering 125 acres, has a maximum storage capacity of 150 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1968, 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.
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Location
| State | Washington |
| County | San Juan |
| River/Stream | Tr-rocky Bay |
| Coordinates | 48.57982, -123.08796 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Length | 184 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 125 acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lakedale Resort |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00121 |
| Federal ID | WA00121 |
| More Info | State Dam Safety Program |