Alton Lake Dam is an earth dam located in Audrain County, Missouri, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 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 Alton Lake Dam
The primary purpose of Alton Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mo Dept of Conservation (state). It impounds the Tr-hickory Creek near Middletown.
The dam stands 15 feet tall, creates a reservoir covering 21 acres, has a maximum storage capacity of 169 acre-feet, and collects water from a drainage area of 1,020 square miles. Completed in 1964, 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 | Audrain |
| Nearest City | Middletown |
| River/Stream | Tr-hickory Creek |
| Coordinates | 39.27493, -91.56432 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 169 acre-ft |
| Max Storage | 169 acre-ft |
| Normal Storage | 105 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 1,020 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mo Dept of Conservation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10734 |
| Federal ID | MO10734 |
| More Info | State Dam Safety Program |