Norris Slurry Impoundment
Norris Slurry Impoundment is an earth dam located in Fulton County, Illinois, built in 1955. It carries a High hazard potential classification.
About Norris Slurry Impoundment
Norris Slurry Impoundment is a dam in Fulton, Illinois. The dam is owned by Chad Herman (private). It impounds the Big Creek-offstream near Norris.
The dam stands 50 feet tall and stretches 5,280 feet across, has a maximum storage capacity of 1,000 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1955, the structure is well into its service life at over 50 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 09/09/2025.
At 50 feet, this dam is taller than 93% of dams nationwide.
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 | Fulton |
| Nearest City | Norris |
| River/Stream | Big Creek-offstream |
| Coordinates | 40.62641, -90.04851 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 5,280 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 1,000 acre-ft |
| Max Storage | 1,000 acre-ft |
| Normal Storage | 800 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 10 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | CHAD HERMAN |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 09/09/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50367 |
| Federal ID | IL50367 |
| More Info | State Dam Safety Program |