Doyle Lake Dam
Doyle Lake Dam is an earth dam located in Adams County, Illinois, built in 1994. It carries a High hazard potential classification.
About Doyle Lake Dam
The primary purpose of Doyle Lake Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Doyle Equipment Manufacturing Co. (private). It impounds the Trib Little Mill Creek near Marblehead.
The dam stands 62 feet tall and stretches 575 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 365 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1994, the structure is 32 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 08/12/2025.
At 62 feet, this dam is taller than 95% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Illinois dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Adams |
| Nearest City | Marblehead |
| River/Stream | Trib Little Mill Creek |
| Coordinates | 39.95891, -91.29328 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 62 ft |
| Dam Height | 62 ft |
| Dam Length | 575 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 365 acre-ft |
| Max Storage | 365 acre-ft |
| Normal Storage | 280 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,030 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | DOYLE EQUIPMENT MANUFACTURING CO. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 08/12/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50450 |
| Federal ID | IL50450 |
| More Info | State Dam Safety Program |