Mclean Reservoir Dam is an earth dam located in Hampden County, Massachusetts, built in 1903. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 700 ft long, taller than 80% of U.S. dams with a recorded height. 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 Mclean Reservoir Dam
The primary purpose of Mclean 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 City of Holyoke (local government). It impounds the Tributary to Paucatuck Brook near Holyoke.
The dam stands 35 feet tall and stretches 700 feet across, creates a reservoir covering 59 acres, has a maximum storage capacity of 1,240 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1903, the structure is over a century old.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/19/2023.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Massachusetts |
| County | Hampden |
| Nearest City | Holyoke |
| River/Stream | Tributary to Paucatuck Brook |
| Coordinates | 42.17727, -72.66816 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Length | 700 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 1,240 acre-ft |
| Max Storage | 1,240 acre-ft |
| Normal Storage | 1,118 acre-ft |
| Surface Area | 59 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 283 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Holyoke |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/19/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA00539 |
| Federal ID | MA00539 |
| More Info | State Dam Safety Program |