Harrisonville City Lake Dam
Harrisonville City Lake Dam is an earth dam located in Cass County, Missouri, built in 1971. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Harrisonville City Lake Dam
The primary purpose of Harrisonville City Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Harrisonville (local government). It impounds the Tr Middle Big Creek near Pleasant Hill.
The dam stands 55 feet tall and stretches 1,900 feet across, creates a reservoir covering 398 acres, has a maximum storage capacity of 13,520 acre-feet, and collects water from a drainage area of 14 square miles. Completed in 1971, the structure is well into its service life at over 50 years old.
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 03/30/2022.
At 55 feet, this dam is taller than 94% 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 Missouri 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 | Missouri |
| County | Cass |
| Nearest City | Pleasant Hill |
| River/Stream | Tr Middle Big Creek |
| Coordinates | 38.76444, -94.32583 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 1,900 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 13,520 acre-ft |
| Max Storage | 13,520 acre-ft |
| Normal Storage | 11,275 acre-ft |
| Surface Area | 398 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 28,862 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF HARRISONVILLE |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/30/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO20077 |
| Federal ID | MO20077 |
| More Info | State Dam Safety Program |