Martin Family Dam is an earth dam located in Jefferson County, Illinois. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 550 ft long. 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 Martin Family Dam
The primary purpose of Martin Family Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Thomas Martin (private). It impounds the Trib Atchison Creek near Bonnie.
The dam stands 21 feet tall and stretches 550 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 168 acre-feet, and collects water from a drainage area of 0 square miles.
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. The most recent inspection on record was 11/05/2026.
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Location
| State | Illinois |
| County | Jefferson |
| Nearest City | Bonnie |
| River/Stream | Trib Atchison Creek |
| Coordinates | 38.21561, -88.87721 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 550 ft |
Storage & Hydraulics
| NID Storage | 168 acre-ft |
| Max Storage | 168 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Thomas Martin |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/05/2026 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50665 |
| Federal ID | IL50665 |
| More Info | State Dam Safety Program |