Upper Big Nemaha 11-a

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateNebraska
CountyLancaster
Nearest CityFIRTH
River/StreamTR-MID BR BIG NEMAHA RIVER
Coordinates40.53392, -96.60060

Physical Characteristics

Dam TypeEarth
NID Height38 ft
Dam Height36 ft
Dam Length974 ft
Year Completed1971 (55 years old)

Storage & Hydraulics

NID Storage1,148 acre-ft
Max Storage1,148 acre-ft
Normal Storage125 acre-ft
Surface Area25 acres
Drainage Area2 sq mi
Max Discharge8,500 cfs

Ownership & Safety

PurposeFlood Risk Reduction
OwnerNemaha Natural Resources District
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection06/27/2023
Emergency Action PlanYes

Identifiers

NID IDNE00550
Federal IDNE00550
More InfoState Dam Safety Program

Nearby Dams

Golden Pond Dam 1.0 mi Low Upper Big Nemaha L-4 1.2 mi Significant Helmink Dam 1.4 mi Significant Upper Big Nemaha 12-a 1.6 mi Low Upper Big Nemaha L-17 1.8 mi Low Upper Big Nemaha G-18 1.8 mi Low Upper Big Nemaha L-5 1.9 mi Low Upper Big Nemaha 12-b 1.9 mi Low Upper Big Nemaha G-24 2.5 mi Significant Middle Branch Big Nemaha 9-d 2.7 mi Low