Johnson Dam Site 1 is an earth dam located in Jefferson County, Iowa, built in 1993. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 580 ft long, taller than 59% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Johnson Dam Site 1
The primary purpose of Johnson Dam Site 1 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 Robert C Johnson (private). It impounds the Tr- Mitchell Creek near Fairfield.
The dam stands 27 feet tall and stretches 580 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1993, the structure is 33 years old.
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.
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Location
| State | Iowa |
| County | Jefferson |
| Nearest City | Fairfield |
| River/Stream | Tr- Mitchell Creek |
| Coordinates | 41.05670, -92.02180 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 580 ft |
| Year Completed | 1993 (33 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Robert C Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03032 |
| Federal ID | IA03032 |
| More Info | State Dam Safety Program |