Sinnwell Dam
Sinnwell Dam is an earth dam located in Madison County, Iowa, built in 1987. It carries a Low hazard potential classification.
About Sinnwell Dam
The primary purpose of Sinnwell 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 Kenneth Sinnwell (private). It impounds the Tr- Middle River near Patterson.
The dam stands 27 feet tall and stretches 365 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1987, the structure is 39 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 | Madison |
| Nearest City | Patterson |
| River/Stream | Tr- Middle River |
| Coordinates | 41.32130, -93.88730 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 365 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Kenneth Sinnwell |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02518 |
| Federal ID | IA02518 |
| More Info | State Dam Safety Program |