Marks Lake Dam
Marks Lake Dam is an earth dam located in Lewis County, Missouri, built in 1968. It carries a Low hazard potential classification.
About Marks Lake Dam
The primary purpose of Marks Lake Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Alden N Marks (private). It impounds the Tr-crooked Creek near La Grange.
The dam stands 21 feet tall, creates a reservoir covering 7 acres, has a maximum storage capacity of 79 acre-feet, and collects water from a drainage area of 140 square miles. Completed in 1968, 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 | Lewis |
| Nearest City | La Grange |
| River/Stream | Tr-crooked Creek |
| Coordinates | 40.20307, -91.58836 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 79 acre-ft |
| Max Storage | 79 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 140 sq mi |
Ownership & Safety
| Purpose | Debris Control |
| Owner | ALDEN N MARKS |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO11147 |
| Federal ID | MO11147 |
| More Info | State Dam Safety Program |