Henrys Lake, also known as North Fork Reservoir, is a privately owned water resource located in Fremont County, Idaho. Managed by the Idaho Department of Water Resources, this reservoir on the Henrys Fork of the Snake River serves multiple purposes, including irrigation and wildlife habitat. Built in 1923, the dam stands at a height of 25.2 feet and has a storage capacity of 58,700 acre-feet.

With a surface area of 6,050 acres and a drainage area of 93.4 square miles, Henrys Lake plays a vital role in water management in the region. The dam's controlled spillway and slide gates ensure flood control and water release when needed. Despite its fair condition assessment and high hazard potential, the reservoir continues to be a valuable resource for the local community and wildlife.

In the event of an emergency, the reservoir has an Emergency Action Plan in place, though it has not been updated recently. With a very high risk assessment rating, it is crucial for stakeholders to ensure the proper management and maintenance of Henrys Lake to safeguard its surrounding areas and maintain its ecological balance.