Dead River Dike
Dead River Dike is an earth dam located in Coos County, New Hampshire, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
About Dead River Dike
The primary purpose of Dead River Dike is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Nh Dncr (state). It impounds the Jericho Brook near Berlin.
The dam stands 14 feet tall and stretches 1,665 feet across, creates a reservoir covering 132 acres, has a maximum storage capacity of 2,100 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1970, the structure is well into its service life at over 50 years 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. The most recent inspection on record was 08/18/2021.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Berlin |
| River/Stream | Jericho Brook |
| Coordinates | 44.50038, -71.27141 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 1,665 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 2,100 acre-ft |
| Max Storage | 2,100 acre-ft |
| Surface Area | 132 acres |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | NH DNCR |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/18/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH03557 |
| Federal ID | NH03557 |
| More Info | State Dam Safety Program |