Johnston Dam
Low HazardNot Rated ConditionEmergency Action Plan: Not Required
Location
| State | Iowa |
| County | Van Buren |
| Nearest City | Keosauqua |
| River/Stream | Trib to Des Moines River |
| Coordinates | 40.72360, -92.01170 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 220 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 29 acre-ft |
| Max Storage | 29 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 137 cfs |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Mike Johnston |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |