Jett Subwatershed Site M-5 is an earth dam located in Woodbury County, Iowa, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 43 ft43 ft tall and 791 ft long, taller than 89% 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 Jett Subwatershed Site M-5
The primary purpose of Jett Subwatershed Site M-5 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 Woodbury County Swcd (local government). It impounds the Tr-wolf Creek near Rolly Springs.
The dam stands 43 feet tall and stretches 791 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 195 acre-feet, and collects water from a drainage area of 1 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.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Iowa |
| County | Woodbury |
| Nearest City | Rolly Springs |
| River/Stream | Tr-wolf Creek |
| Coordinates | 42.37070, -95.98340 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 791 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 195 acre-ft |
| Max Storage | 195 acre-ft |
| Normal Storage | 105 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Woodbury County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01215 |
| Federal ID | IA01215 |
| More Info | State Dam Safety Program |