Cass Pond Dam is an earth dam located in Merrimack County, New Hampshire. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 140 ft long. 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 Cass Pond Dam
The primary purpose of Cass Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Des Water Division (state). It impounds the Little Suncook River near Epsom.
The dam stands 10 feet tall and stretches 140 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 83 acre-feet, and collects water from a drainage area of 31 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/18/2018.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Epsom |
| River/Stream | Little Suncook River |
| Coordinates | 43.22270, -71.31750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 140 ft |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 31 sq mi |
| Max Discharge | 1,961 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Nh Des Water Division |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/18/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00578 |
| Federal ID | NH00578 |
| More Info | State Dam Safety Program |