Lake Ashroe Dam
Lake Ashroe Dam is an earth dam located in Sussex County, New Jersey, built in 1972. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lake Ashroe Dam
The primary purpose of Lake Ashroe Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Division Of Parks And Forestry (state). It impounds the Big Flat Brook-tr.
The dam stands 19 feet tall and stretches 220 feet across, creates a reservoir covering 42 acres, has a maximum storage capacity of 697 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1972, the structure is well into its service life at over 50 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/10/2024.
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Location
| State | New Jersey |
| County | Sussex |
| River/Stream | Big Flat Brook-tr |
| Coordinates | 41.18655, -74.81085 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 220 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 697 acre-ft |
| Max Storage | 697 acre-ft |
| Normal Storage | 469 acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 62 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Division of Parks and Forestry |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/10/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00023 |
| Federal ID | NJ00023 |
| More Info | State Dam Safety Program |