Swanson, Holm & Hemmah Group
Swanson, Holm & Hemmah Group is an earth dam located in Goodhue County, Minnesota, built in 1959. It carries a Low hazard potential classification and has a poor condition assessment.
About Swanson, Holm & Hemmah Group
The primary purpose of Swanson, Holm & Hemmah Group 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 Ernst, Steve (private). It impounds the Cannon River-tr near Welch.
The dam stands 30 feet tall and stretches 421 feet across, has a maximum storage capacity of 23 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 04/25/2018.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Minnesota |
| County | Goodhue |
| Nearest City | Welch |
| River/Stream | Cannon River-tr |
| Coordinates | 44.49725, -92.86271 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 29 ft |
| Dam Length | 421 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 23 acre-ft |
| Max Storage | 23 acre-ft |
| Normal Storage | 2 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 54 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Ernst, Steve |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/25/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00471 |
| Federal ID | MN00471 |
| More Info | State Dam Safety Program |