Mary's Lake Dam
Mary's Lake Dam is an earth dam located in Perry County, Missouri, built in 1962. It carries a Low hazard potential classification.
About Mary's Lake Dam
The primary purpose of Mary's Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by St Mary's Seminary (private). It impounds the Tr South Fork Saline Creek near St Mary's.
The dam stands 30 feet tall, creates a reservoir covering 13 acres, has a maximum storage capacity of 209 acre-feet, and collects water from a drainage area of 300 square miles. Completed in 1962, the structure is well into its service life at over 50 years old.
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.
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Location
| State | Missouri |
| County | Perry |
| Nearest City | St Mary's |
| River/Stream | Tr South Fork Saline Creek |
| Coordinates | 37.72180, -89.89832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 209 acre-ft |
| Max Storage | 209 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 300 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | ST MARY'S SEMINARY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30132 |
| Federal ID | MO30132 |
| More Info | State Dam Safety Program |