12-8 is an earth dam located in Brown County, Kansas, built in 2004. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 38 ft38 ft tall and 970 ft long, taller than 84% 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 12-8
The primary purpose of 12-8 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 Wolf River Wjd No 66 (local government). It impounds the South Fork of Wolf River.
The dam stands 38 feet tall and stretches 970 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 1,225 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2004, the structure is relatively new.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/08/2020.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Kansas |
| County | Brown |
| River/Stream | South Fork of Wolf River |
| Coordinates | 39.66295, -95.35273 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 970 ft |
| Year Completed | 2004 (22 years old) |
Storage & Hydraulics
| NID Storage | 1,225 acre-ft |
| Max Storage | 1,225 acre-ft |
| Normal Storage | 290 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,473 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Wolf River Wjd No 66 |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/08/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS07932 |
| Federal ID | KS07932 |
| More Info | State Dam Safety Program |