Gem Lake Dam
Gem Lake Dam is an earth dam located in Jefferson County, Missouri, built in 1960. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Gem Lake Dam
The primary purpose of Gem Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lakewood Hills Hoa (private). It impounds the Tr To La Barque Creek near Eureka.
The dam stands 38 feet tall, creates a reservoir covering 2 acres, has a maximum storage capacity of 31 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1960, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 02/28/2023.
At 38 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Missouri |
| County | Jefferson |
| Nearest City | Eureka |
| River/Stream | Tr To La Barque Creek |
| Coordinates | 38.42672, -90.69769 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 31 acre-ft |
| Max Storage | 31 acre-ft |
| Normal Storage | 6 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | LAKEWOOD HILLS HOA |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/28/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO30465 |
| Federal ID | MO30465 |
| More Info | State Dam Safety Program |