Lonedell Lake Dam
Lonedell Lake Dam is an earth dam located in Franklin County, Missouri, built in 1972. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lonedell Lake Dam
The primary purpose of Lonedell Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lonedell Lakestrustees (private). It impounds the Tr To Tyrey Creek near Richwoods.
The dam stands 56 feet tall and stretches 796 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 400 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, 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 09/21/2021.
At 56 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 | Franklin |
| Nearest City | Richwoods |
| River/Stream | Tr To Tyrey Creek |
| Coordinates | 38.20680, -90.82208 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 56 ft |
| Dam Height | 56 ft |
| Dam Length | 796 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 400 acre-ft |
| Max Storage | 400 acre-ft |
| Normal Storage | 138 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,273 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | LONEDELL LAKESTRUSTEES |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/21/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO31395 |
| Federal ID | MO31395 |
| More Info | State Dam Safety Program |