Weyerhaeuser Dam
Weyerhaeuser Dam is an earth dam located in King County, Washington, built in 1970. It carries a Low hazard potential classification.
About Weyerhaeuser Dam
The primary purpose of Weyerhaeuser Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Weyerhaeuser (private). It impounds the Tr-hylebos Creek near Milton.
The dam stands 15 feet tall and stretches 310 feet across, creates a reservoir covering 57 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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 12/19/1999. That was over 26 years ago.
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Location
| State | Washington |
| County | King |
| Nearest City | Milton |
| River/Stream | Tr-hylebos Creek |
| Coordinates | 47.29718, -122.29882 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Length | 310 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 57 acre-ft |
| Surface Area | 57 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 105 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Weyerhaeuser |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 12/19/1999 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00191 |
| Federal ID | WA00191 |
| More Info | State Dam Safety Program |