Cottonwood Creek 42-a is an earth dam located in Saunders County, Nebraska, built in 1967. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 43 ft43 ft tall and 815 ft long, taller than 89% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Cottonwood Creek 42-a
The primary purpose of Cottonwood Creek 42-a 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 Lower Platte North Natural Resources District (local government). It impounds the Tr-cottonwood Creek near Malmo.
The dam stands 43 feet tall and stretches 815 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 277 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 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 06/30/2021.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Nebraska |
| County | Saunders |
| Nearest City | Malmo |
| River/Stream | Tr-cottonwood Creek |
| Coordinates | 41.27872, -96.75793 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 38 ft |
| Dam Length | 815 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 277 acre-ft |
| Max Storage | 277 acre-ft |
| Normal Storage | 85 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,017 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Lower Platte North Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/30/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00054 |
| Federal ID | NE00054 |
| More Info | State Dam Safety Program |