Upper Big Nemaha L-4

Significant HazardPoor ConditionEmergency Action Plan: Not Required

Location

StateNebraska
CountyLancaster
Nearest CityFIRTH
River/StreamTR-MID BR BIG NEMAHA RIVER
Coordinates40.54762, -96.58717

Physical Characteristics

Dam TypeEarth
NID Height26 ft
Dam Height25 ft
Dam Length700 ft
Year Completed1971 (55 years old)

Storage & Hydraulics

NID Storage371 acre-ft
Max Storage371 acre-ft
Normal Storage64 acre-ft
Surface Area15 acres
Drainage Area1 sq mi
Max Discharge6,384 cfs

Ownership & Safety

PurposeFlood Risk Reduction
OwnerNemaha Natural Resources District
Owner TypeLocal Government
Hazard ClassificationSignificant
Condition AssessmentPoor
Last Inspection04/19/2023
Emergency Action PlanNot Required

Identifiers

NID IDNE00549
Federal IDNE00549
More InfoState Dam Safety Program

Nearby Dams

Helmink Dam 0.9 mi Significant Upper Big Nemaha 11-a 1.2 mi High Upper Big Nemaha L-5 1.3 mi Low Upper Big Nemaha L-17 1.3 mi Low Golden Pond Dam 1.5 mi Low Prairieland Dairy Lagoon Dam 2.2 mi Low North Fork Big Nemaha 23-d 2.5 mi Significant Van Pelt Dam 2.6 mi Low Upper Big Nemaha 12-a 2.6 mi Low Upper Big Nemaha 9-b 2.8 mi Low