Johnston Dam
Iowa — Marion County — TR-BALLARD CREEK
Location
| State | Iowa |
| County | Marion |
| River | TR-BALLARD CREEK |
| Coordinates | 41.39270, -93.19090 |
Physical Characteristics
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 320 ft |
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Surface Area | 5 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Rated |
| EAP Status | Not Required |
| Last Inspection | March 5, 1992 |
| Inspection Frequency | — |
Dam Information
| Year Completed | 1973 |
| Primary Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | Joseph M Johnston |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.