Thomsen Dam
Thomsen Dam is an earth dam located in Woodbury County, Iowa, built in 1959. It carries a Low hazard potential classification.
About Thomsen Dam
The primary purpose of Thomsen 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 Fred Thomsen (private). It impounds the Tr-little Sioux River near Anthon.
The dam stands 38 feet tall and stretches 550 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 91 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.
At 38 feet, this dam is taller than 85% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Woodbury |
| Nearest City | Anthon |
| River/Stream | Tr-little Sioux River |
| Coordinates | 42.44570, -95.88410 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 550 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 91 acre-ft |
| Max Storage | 91 acre-ft |
| Normal Storage | 49 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Fred Thomsen |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01280 |
| Federal ID | IA01280 |
| More Info | State Dam Safety Program |