Coffeen East Fork Shoal Creek Gate Dam is an other dam located in Montgomery County, Illinois, built in 2010. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 45 ft long. 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 Coffeen East Fork Shoal Creek Gate Dam
The primary purpose of Coffeen East Fork Shoal Creek Gate Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Dynegy Midwest Generation, Inc. (public utility). It impounds the East Fork Shoal Creek near Greenville.
The dam stands 12 feet tall and stretches 45 feet across, has a maximum storage capacity of 107 acre-feet, and collects water from a drainage area of 102 square miles. Completed in 2010, the structure is relatively new.
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 09/17/2025.
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Location
| State | Illinois |
| County | Montgomery |
| Nearest City | Greenville |
| River/Stream | East Fork Shoal Creek |
| Coordinates | 39.03301, -89.38364 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 45 ft |
| Year Completed | 2010 (16 years old) |
Storage & Hydraulics
| NID Storage | 107 acre-ft |
| Max Storage | 107 acre-ft |
| Normal Storage | 107 acre-ft |
| Drainage Area | 102 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Dynegy Midwest Generation, Inc. |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/17/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50583 |
| Federal ID | IL50583 |
| More Info | State Dam Safety Program |