Rose Brook Lower Dam
Rose Brook Lower Dam is an earth dam located in Plymouth County, Massachusetts, built in 1930. It carries a Significant hazard potential classification and has a fair condition assessment.
About Rose Brook Lower Dam
The primary purpose of Rose Brook Lower Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by A.d. Makepeace Company (private). It impounds the Rose Brook near Wareham.
The dam stands 15 feet tall and stretches 530 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 150 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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 09/09/2022.
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Location
| State | Massachusetts |
| County | Plymouth |
| Nearest City | Wareham |
| River/Stream | Rose Brook |
| Coordinates | 41.78213, -70.73584 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Length | 530 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 105 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | A.D. Makepeace Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/09/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00038 |
| Federal ID | MA00038 |
| More Info | State Dam Safety Program |