Rock Lake Village Dam
Rock Lake Village Dam is an earth dam located in Johnson County, Missouri, built in 2006. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Rock Lake Village Dam
Rock Lake Village Dam is a dam in Johnson, Missouri. The dam is private-owned. It impounds the Trib. Blackwater River near Elm.
The dam stands 66 feet tall and stretches 730 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 585 acre-feet, and collects water from a drainage area of 0 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 12/02/2020.
At 66 feet, this dam is taller than 96% of all dams in the United States.
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 | Johnson |
| Nearest City | Elm |
| River/Stream | Trib. Blackwater River |
| Coordinates | 38.88489, -94.07294 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 66 ft |
| Dam Height | 66 ft |
| Dam Length | 730 ft |
| Year Completed | 2006 (20 years old) |
Storage & Hydraulics
| NID Storage | 585 acre-ft |
| Max Storage | 585 acre-ft |
| Normal Storage | 540 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Controlled |
Ownership & Safety
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/02/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO40148 |
| Federal ID | MO40148 |
| More Info | State Dam Safety Program |