Thelen Dam
Thelen Dam is an earth dam located in Polk County, Nebraska, built in 1969. It carries a Low hazard potential classification and has a poor condition assessment.
About Thelen Dam
Thelen Dam is a dam in Polk, Nebraska. The dam is owned by Happy Hogs Llc (private). It impounds the Tr-big Blue River near Surprise.
The dam stands 18 feet tall and stretches 410 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, 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 05/01/2019.
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Location
| State | Nebraska |
| County | Polk |
| Nearest City | Surprise |
| River/Stream | Tr-big Blue River |
| Coordinates | 41.13308, -97.43939 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 17 ft |
| Dam Length | 410 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 25 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 166 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Happy Hogs LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/01/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00140 |
| Federal ID | NE00140 |
| More Info | State Dam Safety Program |