Johnston Dam
Johnston Dam is an earth dam located in Van Buren County, Iowa, built in 1962. It carries a Low hazard potential classification.
About Johnston Dam
The primary purpose of Johnston 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 Robert Johnston (private). It impounds the Tr-des Moines near Keosauqua.
The dam stands 33 feet tall and stretches 452 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1962, 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 02/15/1968. That was over 58 years ago.
At 33 feet, this dam is taller than 78% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Van Buren |
| Nearest City | Keosauqua |
| River/Stream | Tr-des Moines |
| Coordinates | 40.72600, -92.00830 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 452 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 117 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Robert Johnston |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 02/15/1968 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01100 |
| Federal ID | IA01100 |
| More Info | State Dam Safety Program |