Gruwell Dam
Gruwell Dam is an earth dam located in Harlan County, Nebraska, built in 1960. It carries a Low hazard potential classification and has a poor condition assessment.
About Gruwell Dam
The primary purpose of Gruwell 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 Roger Gruwell (private). It impounds the Tr-crow Creek near Naponee.
The dam stands 13 feet tall and stretches 400 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 66 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1960, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/31/2023.
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Location
| State | Nebraska |
| County | Harlan |
| Nearest City | Naponee |
| River/Stream | Tr-crow Creek |
| Coordinates | 40.01782, -99.18973 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 400 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 66 acre-ft |
| Max Storage | 66 acre-ft |
| Normal Storage | 23 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Roger Gruwell |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/31/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE03715 |
| Federal ID | NE03715 |
| More Info | State Dam Safety Program |