Hannon Lake Dam is an earth dam located in Dallas County, Missouri, built in 1975. 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 Hannon Lake Dam
The primary purpose of Hannon Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by E G Hannon (private). It impounds the Patterson Branch near March.
The dam stands 15 feet tall, creates a reservoir covering 10 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 85 square miles. Completed in 1975, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Dallas |
| Nearest City | March |
| River/Stream | Patterson Branch |
| Coordinates | 37.48962, -93.03465 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 43 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 85 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | E G Hannon |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31659 |
| Federal ID | MO31659 |
| More Info | State Dam Safety Program |