Lake Arrowhead Dam
Lake Arrowhead Dam is an earth dam located in Morris County, New Jersey, built in 1925. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lake Arrowhead Dam
The primary purpose of Lake Arrowhead Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lake Arrowhead Club, Inc. (private). It impounds the Den Brook near Denville.
The dam stands 8 feet tall and stretches 375 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 114 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1925, the structure is over a century 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 10/04/2023.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Denville |
| River/Stream | Den Brook |
| Coordinates | 40.88947, -74.46778 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 375 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 114 acre-ft |
| Max Storage | 114 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 16 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lake Arrowhead Club, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/04/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00172 |
| Federal ID | NJ00172 |
| More Info | State Dam Safety Program |