Knights Pond Dam
Knights Pond Dam is an earth dam located in Hampshire County, Massachusetts, built in 1900. It carries a Significant hazard potential classification and has a fair condition assessment.
About Knights Pond Dam
The primary purpose of Knights 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 Springfield Water And Sewer Commission (local government). It impounds the Jabbish Brook near Belchertown.
The dam stands 19 feet tall and stretches 450 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 420 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1900, the structure is over a century old.
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 11/16/2023.
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Location
| State | Massachusetts |
| County | Hampshire |
| Nearest City | Belchertown |
| River/Stream | Jabbish Brook |
| Coordinates | 42.35151, -72.41026 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Length | 450 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Max Storage | 420 acre-ft |
| Normal Storage | 270 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 468 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Springfield Water and Sewer Commission |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/16/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00485 |
| Federal ID | MA00485 |
| More Info | State Dam Safety Program |