Dead River Dam 1, also known as Jericho Lake Dam, is a state-owned structure located in Coos County, New Hampshire.
Wind
Humidity
Built in 1970 by the USDA NRCS, this earth dam serves the primary purpose of flood risk reduction along Jericho Brook. Standing at a height of 46.5 feet and stretching 3035 feet in length, the dam has a storage capacity of 4720 acre-feet, with a normal storage level of 1240 acre-feet.
Managed by the NHDES Dam Bureau, Dead River Dam 1 is subject to state regulation, permitting, inspection, and enforcement to ensure its safety and compliance with standards. The dam has a high hazard potential and was last assessed to be in fair condition in August 2017. With a moderate risk rating of 3, the structure is regularly monitored and inspected to mitigate any potential risks and ensure the safety of the surrounding area.
Water resource and climate enthusiasts will be fascinated by the engineering and management aspects of Dead River Dam 1, as well as its critical role in flood risk reduction in the region. The dam's design, construction, and operation reflect a commitment to safeguarding communities and natural resources from the impacts of extreme weather events. As a key component of the local water infrastructure, this dam exemplifies the importance of proactive risk management and regulatory oversight in ensuring the resilience of our water resource systems.
Year Completed |
1970 |
Dam Length |
3035 |
Dam Height |
46.5 |
River Or Stream |
JERICHO BROOK |
Primary Dam Type |
Earth |
Surface Area |
132 |
Drainage Area |
6.48 |
Nid Storage |
4720 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
47 |
Androscoggin River Near Gorham
|
2640cfs |
Upper Ammonoosuc River Near Groveton
|
257cfs |
Wild River At Gilead
|
48cfs |
Androscoggin River At Errol
|
1500cfs |
Connecticut River Near Dalton
|
811cfs |
Ammonoosuc River At Bethlehem Junction
|
144cfs |
| Location | Reservations | Toilets |
|---|---|---|
Milan Hill State Park
|
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Rogers Ledge Campsite
|
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Moose Brook State Park
|
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Trident Col Tentsite
|
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Unknown Pond Campsite
|
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Unknown Pond Tentsite
|