Lake Lenexa
Lake Lenexa is an earth dam located in Johnson County, Kansas, built in 2006. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lake Lenexa
The primary purpose of Lake Lenexa is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lenexa, City Of (local government). It impounds the Coon Creek-tr near Lenexa.
The dam stands 46 feet tall and stretches 740 feet across, creates a reservoir covering 33 acres, has a maximum storage capacity of 1,020 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 2006, the structure is relatively new.
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 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 03/29/2022.
At 46 feet, this dam is taller than 91% of dams nationwide.
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 | Lenexa |
| River/Stream | Coon Creek-tr |
| Coordinates | 38.96616, -94.83592 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 740 ft |
| Year Completed | 2006 (20 years old) |
Storage & Hydraulics
| NID Storage | 1,020 acre-ft |
| Max Storage | 1,020 acre-ft |
| Normal Storage | 570 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 17,900 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | LENEXA, CITY OF |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/29/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS09270 |
| Federal ID | KS09270 |
| More Info | State Dam Safety Program |