Long Branch 70, located in Nemaha, Nebraska, is a local government-owned earth dam designed by the USDA NRCS and regulated by the NE DNR.
Wind
Humidity
Completed in 1984, this dam serves primarily for flood risk reduction along the Long Br Big Nemaha River. With a height of 35 feet and a length of 862 feet, Long Branch 70 has a storage capacity of 561 acre-feet and covers a surface area of 16 acres, draining a 2.4 square mile watershed.
Despite being classified as having a low hazard potential, Long Branch 70 is regularly inspected by state authorities, with the last inspection conducted in November 2018 and rated as satisfactory. The dam has a hydraulic height of 34 feet and is equipped with spillway structures to manage maximum discharges of up to 2075 cubic feet per second. With a condition assessment indicating its current state as satisfactory, Long Branch 70 continues to provide essential flood risk reduction benefits for the surrounding area while meeting state regulatory standards.
Year Completed |
1984 |
Dam Length |
862 |
Dam Height |
35 |
River Or Stream |
LONG BR BIG NEMAHA RIVER |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
34 |
Drainage Area |
2.4 |
Nid Storage |
561 |
Structural Height |
40 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
North Fork Big Nemaha River At Humboldt
|
67cfs |
Little Nemaha River At Auburn
|
82cfs |
Turkey C Nr Seneca
|
15cfs |
Big Nemaha River At Falls City
|
310cfs |
Missouri River At Nebraska City
|
22500cfs |
Tarkio River At Fairfax Mo
|
88cfs |