Sky Harbor Detention Area A Dam
Sky Harbor Detention Area A Dam is an earth dam located in Will County, Illinois, built in 2008. It carries a High hazard potential classification.
About Sky Harbor Detention Area A Dam
The primary purpose of Sky Harbor Detention Area A 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 Sky Harbor Homeowners Association (private). It impounds the Jackson Creek near New Lenox.
The dam stands 7 feet tall and stretches 850 feet across, and has a maximum storage capacity of 28 acre-feet. Completed in 2008, the structure is relatively new.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 05/07/2025.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Illinois dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Will |
| Nearest City | New Lenox |
| River/Stream | Jackson Creek |
| Coordinates | 41.47668, -87.92397 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 850 ft |
| Year Completed | 2008 (18 years old) |
Storage & Hydraulics
| NID Storage | 28 acre-ft |
| Max Storage | 28 acre-ft |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | SKY HARBOR HOMEOWNERS ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 05/07/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL55128 |
| Federal ID | IL55128 |
| More Info | State Dam Safety Program |