Cobble Mountain Reservoir Dam
LITTLE RIVER·
Hampden, Massachusetts·
Built 1933·
Earth·
245 ft tall
Physical Details
| Dam Height | 245 ft (taller than 99.9% in MA) |
| Dam Length | 730 ft |
| Dam Type | Earth |
| Max Storage | 96.5K acre-ft |
| Normal Storage | 70.0K acre-ft |
| Surface Area | 1,134 acres |
| Drainage Area | 45 sq mi |
| Year Completed | 1933 (93 years old) |
| NID ID | MA00068 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: November 7, 2017
State Regulated: Yes
Regulatory Agency: DEPARTMENT OF CONSERVATION AND RECREATION
Ownership
CITY OF SPRINGFIELD, WATER AND SEWER COMMISSION
Local Government
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Significant Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Cobble Mountain Reservoir Dam?
Cobble Mountain Reservoir Dam is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Cobble Mountain Reservoir Dam?
Cobble Mountain Reservoir Dam is owned by CITY OF SPRINGFIELD, WATER AND SEWER COMMISSION (Local Government).
When was Cobble Mountain Reservoir Dam last inspected?
Cobble Mountain Reservoir Dam was last inspected on November 7, 2017.
When was Cobble Mountain Reservoir Dam built?
Cobble Mountain Reservoir Dam was completed in 1933, making it 93 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.