Knutson Dam
Knutson Dam is an earth dam located in Hamilton County, Iowa, built in 2022. It carries a Low hazard potential classification.
About Knutson Dam
The primary purpose of Knutson 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 Joyce Knutson (private). It impounds the Keigley Branch near Ames.
The dam stands 9 feet tall and stretches 475 feet across, creates a reservoir covering 33 acres, has a maximum storage capacity of 289 acre-feet, and collects water from a drainage area of 556 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 | Hamilton |
| Nearest City | Ames |
| River/Stream | Keigley Branch |
| Coordinates | 42.21130, -93.66590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 475 ft |
| Year Completed | 2022 (4 years old) |
Storage & Hydraulics
| NID Storage | 289 acre-ft |
| Max Storage | 289 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 556 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Joyce Knutson |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04339 |
| Federal ID | IA04339 |
| More Info | State Dam Safety Program |