Donnelly Pond Dam is an earth dam located in Rock Island County, Illinois, built in 1965. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 180 ft long, taller than 62% 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 Donnelly Pond Dam
The primary purpose of Donnelly Pond Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Lloyd R. Terrill (private). It impounds the Trib Coppers Creek near Wrayville.
The dam stands 28 feet tall and stretches 180 feet across, and has a maximum storage capacity of 34 acre-feet. Completed in 1965, the structure is well into its service life at over 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 07/18/2025.
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Location
| State | Illinois |
| County | Rock Island |
| Nearest City | Wrayville |
| River/Stream | Trib Coppers Creek |
| Coordinates | 41.39499, -90.94134 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 180 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 34 acre-ft |
| Max Storage | 34 acre-ft |
| Normal Storage | 21 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Lloyd R. Terrill |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/18/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00556 |
| Federal ID | IL00556 |
| More Info | State Dam Safety Program |