Dupage Airport Lower Dam is an earth dam located in DuPage County, Illinois, built in 1992. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 500 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 Dupage Airport Lower Dam
The primary purpose of Dupage Airport Lower Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Dupage County Airport Authority (local government). It impounds the Trib Kress Creek near Lombard.
The dam stands 15 feet tall and stretches 500 feet across, and has a maximum storage capacity of 90 acre-feet. Completed in 1992, the structure is 34 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 05/28/2025.
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Location
| State | Illinois |
| County | DuPage |
| Nearest City | Lombard |
| River/Stream | Trib Kress Creek |
| Coordinates | 41.88225, -88.24768 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 500 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 90 acre-ft |
| Max Storage | 90 acre-ft |
| Max Discharge | 550 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Dupage County Airport Authority |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/28/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50205 |
| Federal ID | IL50205 |
| More Info | State Dam Safety Program |