Lake Osage Dam
Lake Osage Dam is an earth dam located in Webster County, Missouri, built in 1959. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lake Osage Dam
The primary purpose of Lake Osage Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ozark Council 308, Bsa (private). It impounds the Tr Osage Fk-gasconade River near Rader.
The dam stands 38 feet tall and stretches 600 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 151 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, 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 10/27/2020.
At 38 feet, this dam is taller than 85% 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 | Webster |
| Nearest City | Rader |
| River/Stream | Tr Osage Fk-gasconade River |
| Coordinates | 37.33104, -92.82088 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 600 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 151 acre-ft |
| Max Storage | 151 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,423 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | OZARK COUNCIL 308, BSA |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/27/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO30120 |
| Federal ID | MO30120 |
| More Info | State Dam Safety Program |