South Mack Glass Pond Dam is an earth dam located in Warren County, Illinois, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 200 ft long, taller than 65% 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 South Mack Glass Pond Dam
The primary purpose of South Mack Glass Pond 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 Mack Glass (private). It impounds the Henderson Creek N near Oquawka.
The dam stands 29 feet tall and stretches 200 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 32 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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.
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Location
| State | Illinois |
| County | Warren |
| Nearest City | Oquawka |
| River/Stream | Henderson Creek N |
| Coordinates | 40.99373, -90.52388 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 200 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 32 acre-ft |
| Max Storage | 32 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 163 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Mack Glass |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40149 |
| Federal ID | IL40149 |
| More Info | State Dam Safety Program |