Jonbar Ranch Dam is an earth dam located in Dallas County, Iowa, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 472 ft long, taller than 76% 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 Jonbar Ranch Dam
The primary purpose of Jonbar Ranch 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 Jonbar Ranch (private). It impounds the Tr-raccoon River near Booneville.
The dam stands 33 feet tall and stretches 472 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 104 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1966, 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 10/11/1967. That was over 59 years ago.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Iowa |
| County | Dallas |
| Nearest City | Booneville |
| River/Stream | Tr-raccoon River |
| Coordinates | 41.53440, -93.90590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 472 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Jonbar Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/11/1967 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00285 |
| Federal ID | IA00285 |
| More Info | State Dam Safety Program |