Prescott Mill Dam is an earth dam located in Kendall County, Illinois, built in 2006. It carries a Significant hazard potential classification.
Dam profile
NID height · 7 ft7 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 Prescott Mill Dam
The primary purpose of Prescott Mill Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Prescott Mill HOA (private). It impounds the Trib Wolf Creek near Oswego.
The dam stands 7 feet tall, has a storage capacity of 125 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2006, the structure is relatively new.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 09/02/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Kendall |
| Nearest City | Oswego |
| River/Stream | Trib Wolf Creek |
| Coordinates | 41.70124, -88.26604 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Year Completed | 2006 (20 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Normal Storage | 125 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Prescott Mill HOA |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/02/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50547 |
| Federal ID | IL50547 |
| More Info | State Dam Safety Program |