Hancock

Hancock is a dam located in Adams County, Idaho, built in 1931. It carries a Significant hazard potential classification and has a fair condition assessment.

About Hancock

The primary purpose of Hancock is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is state-owned. It impounds the Little Creek Little Salmon River near Meadows.

The dam stands 29 feet tall and stretches 170 feet across, creates a reservoir covering 21 acres, has a storage capacity of 198 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1931, the structure is well-established, with more than 75 years of service.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 09/20/2017.

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Significant HazardFair ConditionEmergency Action Plan: No

Location

StateIdaho
CountyAdams
Nearest CityMeadows
River/StreamLittle Creek Little Salmon River
Coordinates44.90450, -116.21640

Physical Characteristics

NID Height29 ft
Dam Height29 ft
Dam Length170 ft
Year Completed1931 (95 years old)

Storage & Hydraulics

NID Storage198 acre-ft
Normal Storage198 acre-ft
Surface Area21 acres
Drainage Area5 sq mi
Max Discharge291 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFish and Wildlife Pond
Owner TypeState
Hazard ClassificationSignificant
Condition AssessmentFair
Last Inspection09/20/2017
Emergency Action PlanNo

Identifiers

NID IDID00145
Federal IDID00145
More InfoState Dam Safety Program

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