Upper Sterling
Low HazardSatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | Illinois |
| County | Whiteside |
| Nearest City | Rock Falls |
| River/Stream | Rock Creek |
| Coordinates | 41.78910, -89.67931 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 10 ft |
| Dam Height | 9 ft |
| Dam Length | 1,170 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 7,000 acre-ft |
| Max Storage | 7,000 acre-ft |
| Normal Storage | 7,000 acre-ft |
| Surface Area | 2,400 acres |
| Drainage Area | 8,750 sq mi |
| Max Discharge | 23,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Illinois Dept of Transportation |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/27/2022 |
| Emergency Action Plan | Not Required |