Diamond Lake
Diamond Lake is an earth dam located in Madison County, Missouri, built in 2016. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Diamond Lake
The primary purpose of Diamond Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Chris Reagan. It impounds the Unnamed Trib near Marquand.
The dam stands 42 feet tall and stretches 450 feet across, creates a reservoir covering 24 acres, and has a maximum storage capacity of 402 acre-feet. Completed in 2016, 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. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 09/21/2021.
At 42 feet, this dam is taller than 89% 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 | Madison |
| Nearest City | Marquand |
| River/Stream | Unnamed Trib |
| Coordinates | 37.47702, -90.20587 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 450 ft |
| Year Completed | 2016 (10 years old) |
Storage & Hydraulics
| NID Storage | 402 acre-ft |
| Max Storage | 402 acre-ft |
| Normal Storage | 297 acre-ft |
| Surface Area | 24 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | CHRIS REAGAN |
| Owner Type | Not Listed |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/21/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO41006 |
| Federal ID | MO41006 |
| More Info | State Dam Safety Program |