Spring Lake Dam
Spring Lake Dam is an earth dam located in Winnebago County, Illinois, built in 1965. It carries a Significant hazard potential classification.
About Spring Lake Dam
The primary purpose of Spring Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Spring Lake Estates Home Association (private). It impounds the Trib Spring Creek near Rockford.
The dam stands 10 feet tall and stretches 1,600 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 86 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1965, 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 10/17/2023.
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Location
| State | Illinois |
| County | Winnebago |
| Nearest City | Rockford |
| River/Stream | Trib Spring Creek |
| Coordinates | 42.30473, -89.00907 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 1,600 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 86 acre-ft |
| Max Storage | 86 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 475 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | SPRING LAKE ESTATES HOME ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 10/17/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00545 |
| Federal ID | IL00545 |
| More Info | State Dam Safety Program |