Dam No 7-8
Dam No 7-8 is an earth dam located in Greenwood County, Kansas, built in 1970. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Dam No 7-8
The primary purpose of Dam No 7-8 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 Madison, City Of (local government). It impounds the Holderman Creek-tr near Virgil.
The dam stands 58 feet tall and stretches 1,870 feet across, creates a reservoir covering 114 acres, and has a maximum storage capacity of 3,517 acre-feet. Completed in 1970, the structure is well into its service life at over 50 years old.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 04/08/2013. That was over 12 years ago.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Kansas |
| County | Greenwood |
| Nearest City | Virgil |
| River/Stream | Holderman Creek-tr |
| Coordinates | 38.10740, -96.14579 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 51 ft |
| Dam Length | 1,870 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 3,517 acre-ft |
| Max Storage | 3,517 acre-ft |
| Normal Storage | 1,357 acre-ft |
| Surface Area | 114 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MADISON, CITY OF |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/08/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS02309 |
| Federal ID | KS02309 |
| More Info | State Dam Safety Program |