Johnson Dam
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | Iowa |
| County | Montgomery |
| Nearest City | Coin |
| River/Stream | Unnamed Trib to Tarkio River |
| Coordinates | 40.93290, -95.13820 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 420 ft |
| Year Completed | 2024 (2 years old) |
Storage & Hydraulics
| NID Storage | 59 acre-ft |
| Max Storage | 59 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Carl Tim & Richard Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |