Cusick Polishing Lagoon is an earth dam located in Pend Oreille County, Washington, built in 1978. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 1,950 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 Cusick Polishing Lagoon
Cusick Polishing Lagoon is a dam in Pend Oreille, Washington. The dam is owned by Cusick Town (local government). It impounds the Offstream - Pend Oreille River near Cusick.
The dam stands 10 feet tall and stretches 1,950 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 65 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1978, the structure is 48 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/25/2021.
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Location
| State | Washington |
| County | Pend Oreille |
| Nearest City | Cusick |
| River/Stream | Offstream - Pend Oreille River |
| Coordinates | 48.33550, -117.29927 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Length | 1,950 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 65 acre-ft |
| Max Storage | 65 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Cusick Town |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/25/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA02036 |
| Federal ID | WA02036 |
| More Info | State Dam Safety Program |