Denby Dam 1
Denby Dam 1 is an earth dam located in Sangamon County, Illinois, built in 1976. It carries a Low hazard potential classification.
About Denby Dam 1
The primary purpose of Denby Dam 1 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 Dr. John Denby;dr. John Denby (private). It impounds the Lick Creek near Springfield.
The dam stands 25 feet tall and stretches 300 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1976, the structure is 50 years old.
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 08/05/2025.
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Location
| State | Illinois |
| County | Sangamon |
| Nearest City | Springfield |
| River/Stream | Lick Creek |
| Coordinates | 39.70270, -89.73929 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 300 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 105 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | DR. JOHN DENBY;DR. JOHN DENBY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 08/05/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40138 |
| Federal ID | IL40138 |
| More Info | State Dam Safety Program |