Long Pond Dam is an earth dam located in Barnstable County, Massachusetts, built in 1966. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 7 ft7 ft tall and 95 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 Long Pond Dam
The primary purpose of Long Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town of Yarmouth (local government). It impounds the Parkers River Tributary near Yarmouth.
The dam stands 7 feet tall and stretches 95 feet across, creates a reservoir covering 53 acres, has a maximum storage capacity of 330 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1966, the structure is well into its service life at over 50 years 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 07/30/2020.
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Location
| State | Massachusetts |
| County | Barnstable |
| Nearest City | Yarmouth |
| River/Stream | Parkers River Tributary |
| Coordinates | 41.66605, -70.20539 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Length | 95 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 330 acre-ft |
| Max Storage | 330 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 135 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Town of Yarmouth |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/30/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA02494 |
| Federal ID | MA02494 |
| More Info | State Dam Safety Program |