Upper Twin Lakes Dam
Upper Twin Lakes Dam is an earth dam located in Passaic County, New Jersey. It carries a Low hazard potential classification and has a poor condition assessment.
About Upper Twin Lakes Dam
The primary purpose of Upper Twin Lakes Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Tilicon New York, Inc. (private). It impounds the Irish Brook near Pompton Lakes.
The dam stands 7 feet tall and stretches 270 feet across, creates a reservoir covering 20 acres, has a storage capacity of 61 acre-feet, and collects water from a drainage area of 6 square miles.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 08/17/2018.
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Location
| State | New Jersey |
| County | Passaic |
| Nearest City | Pompton Lakes |
| River/Stream | Irish Brook |
| Coordinates | 41.01700, -74.30148 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 270 ft |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 110 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Tilicon New York, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/17/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00575 |
| Federal ID | NJ00575 |
| More Info | State Dam Safety Program |