Lake George Dam is an earth dam located in Jefferson County, Missouri, built in 1946. It carries a High hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lake George Dam
The primary purpose of Lake George Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Martin + Vincent George (private). It impounds the Tr to Big River near Cedar Hill.
The dam stands 21 feet tall, creates a reservoir covering 9 acres, has a maximum storage capacity of 101 acre-feet, and collects water from a drainage area of 580 square miles. Completed in 1946, the structure is well-established, with more than 75 years of service.
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.
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 | Jefferson |
| Nearest City | Cedar Hill |
| River/Stream | Tr to Big River |
| Coordinates | 38.23028, -90.69750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 101 acre-ft |
| Max Storage | 101 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 580 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Martin + Vincent George |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO30405 |
| Federal ID | MO30405 |
| More Info | State Dam Safety Program |