Johnson Dam
Johnson Dam is an earth dam located in Ringgold County, Iowa, built in 2007. It carries a Low hazard potential classification.
About Johnson Dam
The primary purpose of Johnson Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Dane Johnson (local government). It impounds the Tr- Walnut Creek near Mt. Ayr.
The dam stands 24 feet tall and stretches 492 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 83 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2007, the structure is relatively new.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Ringgold |
| Nearest City | Mt. Ayr |
| River/Stream | Tr- Walnut Creek |
| Coordinates | 40.74860, -94.24520 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 492 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Normal Storage | 36 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Dane Johnson |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03771 |
| Federal ID | IA03771 |
| More Info | State Dam Safety Program |