Pontook
Pontook is a timber crib dam located in Coos County, New Hampshire, built in 1909. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Pontook
The primary purpose of Pontook is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is state-owned. It impounds the Androscoggin River near Milan.
The dam stands 15 feet tall and stretches 399 feet across, creates a reservoir covering 280 acres, has a maximum storage capacity of 883 acre-feet, and collects water from a drainage area of 1,214 square miles. Completed in 1909, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/07/2018.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Milan |
| River/Stream | Androscoggin River |
| Coordinates | 44.63310, -71.24840 |
Physical Characteristics
| Dam Type | Timber Crib |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 399 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 883 acre-ft |
| Max Storage | 883 acre-ft |
| Normal Storage | 883 acre-ft |
| Surface Area | 280 acres |
| Drainage Area | 1,214 sq mi |
| Max Discharge | 20,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/07/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00601 |
| Federal ID | NH00601 |
| More Info | State Dam Safety Program |