Lake Washington Dam
Lake Washington Dam is an earth dam located in Passaic County, New Jersey, built in 1930. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Lake Washington Dam
The primary purpose of Lake Washington Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Wanaque Borough (local government). It impounds the Wanaque River near Haskell.
The dam stands 11 feet tall and stretches 475 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 60 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 06/30/2023.
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Location
| State | New Jersey |
| County | Passaic |
| Nearest City | Haskell |
| River/Stream | Wanaque River |
| Coordinates | 41.02908, -74.29892 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 475 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 125 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Wanaque Borough |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 06/30/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00579 |
| Federal ID | NJ00579 |
| More Info | State Dam Safety Program |