Springfield Coal/industry/pond 21 Dam is an earth dam located in McDonough County, Illinois, built in 1997. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 570 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 Springfield Coal/industry/pond 21 Dam
Springfield Coal/industry/pond 21 Dam is a dam in McDonough, Illinois. The dam is owned by Springfield Coal Company, LLC (private). It impounds the Trib Grindstone Creek.
The dam stands 28 feet tall and stretches 570 feet across, and has a maximum storage capacity of 46 acre-feet. Completed in 1997, the structure is 29 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 10/02/2024.
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Location
| State | Illinois |
| County | McDonough |
| Nearest City | None |
| River/Stream | Trib Grindstone Creek |
| Coordinates | 40.29170, -90.73330 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 570 ft |
| Year Completed | 1997 (29 years old) |
Storage & Hydraulics
| NID Storage | 46 acre-ft |
| Max Storage | 46 acre-ft |
| Normal Storage | 6 acre-ft |
| Max Discharge | 21 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Springfield Coal Company, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/02/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50301 |
| Federal ID | IL50301 |
| More Info | State Dam Safety Program |