Rock Valley Lake Dam
Rock Valley Lake Dam is an earth dam located in Perry County, Missouri, built in 1947. It carries a Low hazard potential classification.
About Rock Valley Lake Dam
The primary purpose of Rock Valley 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 Rock Valley Lake Inc (private). It impounds the Tr South Fork Saline Creek near St Marys.
The dam stands 25 feet tall, creates a reservoir covering 9 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 365 square miles. Completed in 1947, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Perry |
| Nearest City | St Marys |
| River/Stream | Tr South Fork Saline Creek |
| Coordinates | 37.76667, -89.92423 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 365 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | ROCK VALLEY LAKE INC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30003 |
| Federal ID | MO30003 |
| More Info | State Dam Safety Program |