Jewell Dam is an earth dam located in Winneshiek County, Iowa, built in 2022. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 370 ft long, taller than 72% 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 Jewell Dam
The primary purpose of Jewell Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Josey Jewell (private). It impounds the Unnamed Tributary near Decorah.
The dam stands 31 feet tall and stretches 370 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 78 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2022, the structure is relatively new.
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 | Winneshiek |
| Nearest City | Decorah |
| River/Stream | Unnamed Tributary |
| Coordinates | 43.19180, -91.77220 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 370 ft |
| Year Completed | 2022 (4 years old) |
Storage & Hydraulics
| NID Storage | 78 acre-ft |
| Max Storage | 78 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,143 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Josey Jewell |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04369 |
| Federal ID | IA04369 |
| More Info | State Dam Safety Program |