E. D. Edwards Station Ash Pond is an earth dam located in Peoria County, Illinois. It carries a High hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 7,000 ft long, taller than 50% of U.S. dams with a recorded height. 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 E. D. Edwards Station Ash Pond
E. D. Edwards Station Ash Pond is a dam in Peoria, Illinois. The dam is owned by Dynegy, Inc. (public utility). It impounds the Illinois River - Offstream near Pekin.
The dam stands 25 feet tall and stretches 7,000 feet across, and has a maximum storage capacity of 950 acre-feet.
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. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 09/15/2025.
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 | Peoria |
| Nearest City | Pekin |
| River/Stream | Illinois River - Offstream |
| Coordinates | 40.59663, -89.66887 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 7,000 ft |
Storage & Hydraulics
| NID Storage | 950 acre-ft |
| Max Storage | 950 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Dynegy, Inc. |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Last Inspection | 09/15/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50710 |
| Federal ID | IL50710 |
| More Info | State Dam Safety Program |