Jonbar Ranch Dam is an earth dam located in Dallas County, Iowa, built in 1957. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 500 ft long, taller than 50% 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 Ruan Inc / Jonbar Ranch (private). It impounds the Tr-johnson Creek near Raccoon River.
The dam stands 25 feet tall and stretches 500 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 104 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, 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.
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Location
| State | Iowa |
| County | Dallas |
| Nearest City | Raccoon River |
| River/Stream | Tr-johnson Creek |
| Coordinates | 41.53830, -93.88750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 500 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Ruan Inc / Jonbar Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02036 |
| Federal ID | IA02036 |
| More Info | State Dam Safety Program |