Sabic Basins Dam is an earth dam located in LaSalle County, Illinois, built in 1960. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 480 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 Sabic Basins Dam
Sabic Basins Dam is a dam in LaSalle, Illinois. The dam is owned by Sabic Innovative Plastics, LLC (private). It impounds the Illinois R - Offstream near Ottawa.
The dam stands 10 feet tall and stretches 480 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 30 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1960, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/14/2025.
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Location
| State | Illinois |
| County | LaSalle |
| Nearest City | Ottawa |
| River/Stream | Illinois R - Offstream |
| Coordinates | 41.33205, -88.75601 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 480 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 30 acre-ft |
| Max Storage | 30 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Sabic Innovative Plastics, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/14/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50683 |
| Federal ID | IL50683 |
| More Info | State Dam Safety Program |