Middle Branch Big Nemaha 9-c

Middle Branch Big Nemaha 9-c is an earth dam located in Gage County, Nebraska, built in 1977. It carries a Low hazard potential classification and has a satisfactory condition assessment.

About Middle Branch Big Nemaha 9-c

The primary purpose of Middle Branch Big Nemaha 9-c is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Tr-mid Br Big Nemaha River near Adams.

The dam stands 41 feet tall and stretches 960 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 617 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1977, the structure is 49 years 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 06/03/2020.

At 41 feet, this dam is taller than 88% of dams nationwide.

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Low HazardSatisfactory ConditionEmergency Action Plan: Not Required

Location

StateNebraska
CountyGage
Nearest CityAdams
River/StreamTr-mid Br Big Nemaha River
Coordinates40.49652, -96.57969

Physical Characteristics

Dam TypeEarth
NID Height41 ft
Dam Height36 ft
Dam Length960 ft
Year Completed1977 (49 years old)

Storage & Hydraulics

NID Storage617 acre-ft
Max Storage617 acre-ft
Normal Storage95 acre-ft
Surface Area18 acres
Drainage Area1 sq mi
Max Discharge1,675 cfs

Ownership & Safety

PurposeFlood Risk Reduction
OwnerNemaha Natural Resources District
Owner TypeLocal Government
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection06/03/2020
Emergency Action PlanNot Required

Identifiers

NID IDNE01559
Federal IDNE01559
More InfoState Dam Safety Program

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