Hallquist Dam
Hallquist Dam is an earth dam located in Montgomery County, Iowa, built in 2009. It carries a Low hazard potential classification.
About Hallquist Dam
The primary purpose of Hallquist 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 Knute Hallquist (private). It impounds the Trib To Tarkio River near Coin.
The dam stands 28 feet tall and stretches 552 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 156 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2009, 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 | Montgomery |
| Nearest City | Coin |
| River/Stream | Trib To Tarkio River |
| Coordinates | 40.95210, -95.12810 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 552 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 156 acre-ft |
| Max Storage | 156 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Knute Hallquist |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03942 |
| Federal ID | IA03942 |
| More Info | State Dam Safety Program |