Gruenewald Dam is an earth dam located in Butler County, Nebraska, built in 1973. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 465 ft long. 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 Gruenewald Dam
The primary purpose of Gruenewald Dam 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 Alan M & Brian J & Steven D Osantowski (private). It impounds the Tr-wilson Creek near Rogers.
The dam stands 20 feet tall and stretches 465 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 166 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1973, 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 06/15/2021.
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Location
| State | Nebraska |
| County | Butler |
| Nearest City | Rogers |
| River/Stream | Tr-wilson Creek |
| Coordinates | 41.29122, -97.33971 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 19 ft |
| Dam Length | 465 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 166 acre-ft |
| Max Storage | 166 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 898 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Alan M & Brian J & Steven D Osantowski |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/15/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00294 |
| Federal ID | NE00294 |
| More Info | State Dam Safety Program |