Lake John
Significant HazardSatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | Minnesota |
| County | Yellow Medicine |
| Nearest City | Porter |
| River/Stream | Mud Creek-TR |
| Coordinates | 44.64242, -96.22546 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 557 acre-ft |
| Max Storage | 557 acre-ft |
| Normal Storage | 155 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 3,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | WD of Yellow Medicine River |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/28/2024 |
| Emergency Action Plan | Not Required |