Alpine Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Winnebago |
| Nearest City | ROCKFORD |
| River/Stream | KEITH CREEK |
| Coordinates | 42.27146, -89.02578 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 600 ft |
| Year Completed | 1942 (84 years old) |
Storage & Hydraulics
| NID Storage | 1,770 acre-ft |
| Max Storage | 1,770 acre-ft |
| Drainage Area | 7 sq mi |
| Max Discharge | 17,429 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF ROCKFORD |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 10/16/2025 |
| Emergency Action Plan | Yes |