South Frisco
South Frisco is an earth dam located in Johnson County, Kansas, built in 1868. It carries a High hazard potential classification and has a poor condition assessment.
About South Frisco
South Frisco is a dam in Johnson, Kansas. The dam is owned by Olathe, City Of (local government). It impounds the Mill Creek-tr near Olathe.
The dam stands 22 feet tall and stretches 1,500 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 291 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1868, the structure is one of the older dams in the region, with over a century and a half of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 04/05/2022.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Kansas dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Kansas |
| County | Johnson |
| Nearest City | Olathe |
| River/Stream | Mill Creek-tr |
| Coordinates | 38.87137, -94.80547 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 1,500 ft |
| Year Completed | 1868 (158 years old) |
Storage & Hydraulics
| NID Storage | 291 acre-ft |
| Max Storage | 291 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,400 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | OLATHE, CITY OF |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 04/05/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS04169 |
| Federal ID | KS04169 |
| More Info | State Dam Safety Program |