Millvale Reservoir Dam
Millvale Reservoir Dam is a stone dam located in Essex County, Massachusetts, built in 1898. It carries a High hazard potential classification and has a fair condition assessment.
About Millvale Reservoir Dam
The primary purpose of Millvale Reservoir 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 Haverhill (local government). It impounds the East Meadow River (tributary Of Merrimack River) near Haverhill.
The dam stands 18 feet tall and stretches 150 feet across, creates a reservoir covering 52 acres, has a maximum storage capacity of 562 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1898, the structure is over a century old.
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 11/15/2023.
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 Massachusetts 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 | Massachusetts |
| County | Essex |
| Nearest City | Haverhill |
| River/Stream | East Meadow River (tributary Of Merrimack River) |
| Coordinates | 42.78605, -71.03193 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 18 ft |
| Dam Length | 150 ft |
| Year Completed | 1898 (128 years old) |
Storage & Hydraulics
| NID Storage | 562 acre-ft |
| Max Storage | 562 acre-ft |
| Normal Storage | 399 acre-ft |
| Surface Area | 52 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 1,330 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Haverhill |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 11/15/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00228 |
| Federal ID | MA00228 |
| More Info | State Dam Safety Program |