Jdw Dam is an earth dam located in Iowa County, Iowa, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 355 ft long, taller than 62% 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 Jdw Dam
The primary purpose of Jdw 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 Jdw Grazing Assn (private). It impounds the Tr-iowa River near Marengo.
The dam stands 28 feet tall and stretches 355 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 47 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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 04/20/1977. That was over 49 years ago.
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Location
| State | Iowa |
| County | Iowa |
| Nearest City | Marengo |
| River/Stream | Tr-iowa River |
| Coordinates | 41.86100, -92.08000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 355 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 47 acre-ft |
| Max Storage | 47 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Jdw Grazing Assn |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/20/1977 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00519 |
| Federal ID | IA00519 |
| More Info | State Dam Safety Program |