South Deerfield Water Supply Dam
South Deerfield Water Supply Dam is a concrete dam located in Franklin County, Massachusetts. It carries a Significant hazard potential classification and has a fair condition assessment.
About South Deerfield Water Supply Dam
The primary purpose of South Deerfield Water Supply 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 South Deerfield Water Supply District (local government). It impounds the Roaring Brook near Whately.
The dam stands 30 feet tall and stretches 120 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 32 acre-feet, and collects water from a drainage area of 5 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 10/22/2021.
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Location
| State | Massachusetts |
| County | Franklin |
| Nearest City | Whately |
| River/Stream | Roaring Brook |
| Coordinates | 42.46696, -72.65346 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 30 ft |
| Dam Length | 120 ft |
Storage & Hydraulics
| NID Storage | 32 acre-ft |
| Max Storage | 32 acre-ft |
| Normal Storage | 22 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | South Deerfield Water Supply District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/22/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00522 |
| Federal ID | MA00522 |
| More Info | State Dam Safety Program |