Monroe City Dam
Monroe City Dam is an earth dam located in Ralls County, Missouri, built in 1967. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Monroe City Dam
The primary purpose of Monroe City Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Monroe City (local government). It impounds the Ely Creek near New London.
The dam stands 47 feet tall and stretches 600 feet across, creates a reservoir covering 95 acres, has a maximum storage capacity of 3,000 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 12/08/2022.
At 47 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Missouri |
| County | Ralls |
| Nearest City | New London |
| River/Stream | Ely Creek |
| Coordinates | 39.60624, -91.66500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 47 ft |
| Dam Length | 600 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 3,000 acre-ft |
| Max Storage | 3,000 acre-ft |
| Normal Storage | 1,170 acre-ft |
| Surface Area | 95 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 10,149 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | MONROE CITY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/08/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO10542 |
| Federal ID | MO10542 |
| More Info | State Dam Safety Program |