Haynes Reservoir Dam is an earth dam located in Worcester County, Massachusetts. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 680 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Haynes Reservoir Dam
The primary purpose of Haynes 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 Leominster (local government). It impounds the Tributary of Monoosnoc Brook and North Nashua River near Leominster.
The dam stands 15 feet tall and stretches 680 feet across, creates a reservoir covering 56 acres, has a maximum storage capacity of 400 acre-feet, and collects water from a drainage area of 0 square miles.
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 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 11/18/2021.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Leominster |
| River/Stream | Tributary of Monoosnoc Brook and North Nashua River |
| Coordinates | 42.51513, -71.80327 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Length | 680 ft |
Storage & Hydraulics
| NID Storage | 400 acre-ft |
| Max Storage | 400 acre-ft |
| Normal Storage | 230 acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 80 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Leominster |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/18/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00881 |
| Federal ID | MA00881 |
| More Info | State Dam Safety Program |