Johnson Dam
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Charles Mix |
| Nearest City | NONE |
| River/Stream | SPRING CREEK-TR |
| Coordinates | 43.16645, -98.68744 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 400 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 340 acre-ft |
| Max Storage | 340 acre-ft |
| Normal Storage | 170 acre-ft |
| Surface Area | 17 acres |
| Max Discharge | 1,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Jay Johnson Living Trust |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |