Andersen Dam
Andersen Dam is an earth dam located in Harrison County, Iowa, built in 2001. It carries a Low hazard potential classification.
About Andersen Dam
The primary purpose of Andersen Dam is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Ben Andersen (private). It impounds the Tr-willow Creek near Missouri Valley.
The dam stands 27 feet tall and stretches 432 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 29 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Harrison |
| Nearest City | Missouri Valley |
| River/Stream | Tr-willow Creek |
| Coordinates | 41.81810, -95.73170 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 432 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 29 acre-ft |
| Max Storage | 29 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Ben Andersen |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03929 |
| Federal ID | IA03929 |
| More Info | State Dam Safety Program |