Upper Millpond Dam
Upper Millpond Dam is a rockfill dam located in Essex County, Massachusetts, built in 1920. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Millpond Dam
The primary purpose of Upper Millpond 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 William H. Herrick Iii & Susan J. Herrick (private). It impounds the Mill River near Rowley.
The dam stands 9 feet tall and stretches 250 feet across, has a maximum storage capacity of 72 acre-feet, and collects water from a drainage area of 530 square miles. Completed in 1920, 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.
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Location
| State | Massachusetts |
| County | Essex |
| Nearest City | Rowley |
| River/Stream | Mill River |
| Coordinates | 42.70867, -70.94252 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 9 ft |
| Dam Length | 250 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 72 acre-ft |
| Max Storage | 72 acre-ft |
| Normal Storage | 49 acre-ft |
| Drainage Area | 530 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | William H. Herrick III & Susan J. Herrick |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MA00244 |
| Federal ID | MA00244 |
| More Info | State Dam Safety Program |