Echo Lake Spillway Dam
Echo Lake Spillway Dam is an earth dam located in Passaic County, New Jersey, built in 1926. It carries a High hazard potential classification and has a fair condition assessment.
About Echo Lake Spillway Dam
The primary purpose of Echo Lake Spillway Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Newark, Department Of Water And Sewer Utilities (local government). It impounds the Macopin River near Kinnelon.
The dam stands 22 feet tall and stretches 260 feet across, creates a reservoir covering 300 acres, has a maximum storage capacity of 7,686 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1926, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. 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 10/16/2024.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New Jersey dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Jersey |
| County | Passaic |
| Nearest City | Kinnelon |
| River/Stream | Macopin River |
| Coordinates | 41.04937, -74.40643 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 260 ft |
| Year Completed | 1926 (100 years old) |
Storage & Hydraulics
| NID Storage | 7,686 acre-ft |
| Max Storage | 7,686 acre-ft |
| Normal Storage | 4,870 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 3,376 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Newark, Department of Water and Sewer Utilities |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 10/16/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00558 |
| Federal ID | NJ00558 |
| More Info | State Dam Safety Program |