Walnut Point Dam
Walnut Point Dam is an earth dam located in Peoria County, Illinois. It carries a Low hazard potential classification.
About Walnut Point Dam
The primary purpose of Walnut Point 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 Walnut Point Partners (private). It impounds the Trib West Branch Lamarsh Cr near Mapleton.
The dam stands 58 feet tall and stretches 545 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 275 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 04/09/2025.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Illinois |
| County | Peoria |
| Nearest City | Mapleton |
| River/Stream | Trib West Branch Lamarsh Cr |
| Coordinates | 40.64391, -89.73632 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 58 ft |
| Dam Length | 545 ft |
Storage & Hydraulics
| NID Storage | 275 acre-ft |
| Max Storage | 275 acre-ft |
| Normal Storage | 208 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | WALNUT POINT PARTNERS |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 04/09/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50460 |
| Federal ID | IL50460 |
| More Info | State Dam Safety Program |