Lower Robertson is a private hydroelectric dam located in Hinsdale, New Hampshire, along the Ashuelot River.
Wind
Humidity
Built in 1905, this dam stands at a height of 18 feet and has a storage capacity of 100 acre-feet. With a controlled spillway and a maximum discharge of 10,200 cubic feet per second, this dam plays a crucial role in both water resource management and energy generation in the region.
Managed by the NHDES Dam Bureau and regulated by the Federal Energy Regulatory Commission, Lower Robertson is inspected regularly to ensure its structural integrity and compliance with safety standards. Despite being classified as a low hazard potential structure, this dam is considered to have a very high risk (level 1) due to its age and potential impact on the surrounding area in the event of a failure. Emergency action plans have been prepared, but the condition assessment and risk management measures are currently not available, highlighting the importance of ongoing monitoring and maintenance to protect both the environment and the community.
Enthusiasts interested in water resources and climate change will find Lower Robertson to be a fascinating case study in the intersection of infrastructure, regulation, and risk management. The history and ongoing management of this dam offer valuable insights into the challenges and opportunities associated with balancing the benefits of hydroelectric power generation with the need to protect against potential hazards and ensure the long-term sustainability of water resources in the region.
Year Completed |
1905 |
Dam Length |
349 |
Dam Height |
18 |
River Or Stream |
Ashuelot River |
Surface Area |
9 |
Drainage Area |
406 |
Nid Storage |
100 |
Outlet Gates |
Needle - 1, Other Controlled - 1 |
Hazard Potential |
Low |
Nid Height |
18 |
Ashuelot River At Hinsdale
|
225cfs |
Ashuelot River At West Swanzey
|
108cfs |
Ashuelot River Above The Branch
|
21cfs |
S Br Ashuelot River At Webb
|
25cfs |
Green River Near Colrain
|
62cfs |
Millers River At Erving
|
214cfs |
| Location | Reservations | Toilets |
|---|---|---|
Fort Dummer State Park
|
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Richardson-Zlogar Cabin
|
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Swanzey Lake Camping Area
|
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Pilgrim Pines Camping Area
|
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Falls Brook Shelter
|