Upper Reservoir Dam is an earth dam located in Barnstable County, Massachusetts, built in 1900. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 7 ft7 ft tall. 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 Upper Reservoir Dam
The primary purpose of Upper 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 Ma Department of Conservation & Recreation (state).
The dam stands 7 feet tall, creates a reservoir covering 2 acres, has a maximum storage capacity of 66 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1900, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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. The most recent inspection on record was 04/05/2017.
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Location
| State | Massachusetts |
| County | Barnstable |
| Nearest City | Sandwich |
| Coordinates | 41.74446, -70.46055 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 66 acre-ft |
| Max Storage | 66 acre-ft |
| Normal Storage | 13 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Ma Department of Conservation & Recreation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/05/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA02556 |
| Federal ID | MA02556 |
| More Info | State Dam Safety Program |