Powell Dam
Powell Dam is an earth dam located in Lewis County, Washington, built in 1963. It carries a Low hazard potential classification.
About Powell Dam
The primary purpose of Powell Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wwood (private). It impounds the Blue Creek.
The dam stands 11 feet tall and stretches 374 feet across, creates a reservoir covering 63 acres, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1963, 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 | Lewis |
| River/Stream | Blue Creek |
| Coordinates | 46.50761, -122.70808 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Length | 374 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Normal Storage | 63 acre-ft |
| Surface Area | 63 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WWood |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WA00109 |
| Federal ID | WA00109 |
| More Info | State Dam Safety Program |