Simonds Pond Dam is a stone dam located in Worcester County, Massachusetts. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 865 ft long, taller than 74% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Simonds Pond Dam
The primary purpose of Simonds Pond 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 Monoosnoc Brook near Leominster.
The dam stands 32 feet tall and stretches 865 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 97 acre-feet, and collects water from a drainage area of 4 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 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 05/12/2023.
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Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Leominster |
| River/Stream | Monoosnoc Brook |
| Coordinates | 42.54784, -71.80375 |
Physical Characteristics
| Dam Type | Stone |
| NID Height | 32 ft |
| Dam Length | 865 ft |
Storage & Hydraulics
| NID Storage | 97 acre-ft |
| Max Storage | 97 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,571 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Leominster |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/12/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00874 |
| Federal ID | MA00874 |
| More Info | State Dam Safety Program |