Rainbow Lake Dam
Rainbow Lake Dam is an earth dam located in Greene County, Missouri, built in 1974. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Rainbow Lake Dam
The primary purpose of Rainbow Lake Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Paul Olive (state). It impounds the Tr-sims Br N Dry Sac River near Aldrich.
The dam stands 42 feet tall and stretches 500 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 240 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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 01/28/2022.
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 | Greene |
| Nearest City | Aldrich |
| River/Stream | Tr-sims Br N Dry Sac River |
| Coordinates | 37.36044, -93.26319 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 500 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 240 acre-ft |
| Max Storage | 240 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,154 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | PAUL OLIVE |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/28/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO20394 |
| Federal ID | MO20394 |
| More Info | State Dam Safety Program |