Johnson Dam
Johnson Dam is an earth dam located in Lucas County, Iowa, built in 1972. 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 Raymond L Johnson (private). It impounds the Tr-whitebreast Creek near Red Rock Reservoir.
The dam stands 31 feet tall and stretches 295 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 38 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, the structure is well into its service life at over 50 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. The most recent inspection on record was 02/16/1968. That was over 58 years ago.
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Location
| State | Iowa |
| County | Lucas |
| Nearest City | Red Rock Reservoir |
| River/Stream | Tr-whitebreast Creek |
| Coordinates | 41.05610, -93.33360 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 295 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 38 acre-ft |
| Max Storage | 38 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Raymond L Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 02/16/1968 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00587 |
| Federal ID | IA00587 |
| More Info | State Dam Safety Program |