Tiskilwa Structure 4 Dam
High HazardNot Available ConditionEmergency Action Plan: No
Location
| State | Illinois |
| County | Bureau |
| Nearest City | TISKILWA |
| River/Stream | TRIB ROCK RUN CREEK |
| Coordinates | 41.28848, -89.51749 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 59 ft |
| Dam Height | 59 ft |
| Dam Length | 280 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 288 acre-ft |
| Max Storage | 288 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,280 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | VILLAGE OF TISKILWA |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 05/06/2025 |
| Emergency Action Plan | No |