Patterson Dam is an earth dam located in Clarke County, Iowa, built in 2018. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 447 ft long, taller than 74% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Patterson Dam
The primary purpose of Patterson 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 Thomas Patterson (private). It impounds the Trib to Squaw Creek near Indianola.
The dam stands 32 feet tall and stretches 447 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 57 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2018, 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 | Clarke |
| Nearest City | Indianola |
| River/Stream | Trib to Squaw Creek |
| Coordinates | 41.12530, -93.81610 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 447 ft |
| Year Completed | 2018 (8 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Thomas Patterson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04299 |
| Federal ID | IA04299 |
| More Info | State Dam Safety Program |