Lower Robertson
Lower Robertson is a timber crib dam located in Cheshire County, New Hampshire, built in 1905. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lower Robertson
The primary purpose of Lower Robertson is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is private-owned. It impounds the Ashuelot River near Hinsdale.
The dam stands 18 feet tall and stretches 349 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 406 square miles. Completed in 1905, 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 09/18/2019.
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Location
| State | New Hampshire |
| County | Cheshire |
| Nearest City | Hinsdale |
| River/Stream | Ashuelot River |
| Coordinates | 42.78870, -72.44190 |
Physical Characteristics
| Dam Type | Timber Crib |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 349 ft |
| Year Completed | 1905 (121 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 406 sq mi |
| Max Discharge | 10,200 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/18/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00276 |
| Federal ID | NH00276 |
| More Info | State Dam Safety Program |