Lower Millpond Dam
Lower Millpond Dam is a concrete dam located in Essex County, Massachusetts. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Lower Millpond Dam
The primary purpose of Lower Millpond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Last Known Owner - Deceased - Marion B. Tompkins (private). It impounds the Mill River near Rowley.
The dam stands 11 feet tall and stretches 65 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 6 square miles.
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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 03/14/2022.
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Location
| State | Massachusetts |
| County | Essex |
| Nearest City | Rowley |
| River/Stream | Mill River |
| Coordinates | 42.72104, -70.93619 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 11 ft |
| Dam Length | 65 ft |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 330 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Last Known Owner - Deceased - Marion B. Tompkins |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 03/14/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA00243 |
| Federal ID | MA00243 |
| More Info | State Dam Safety Program |