Matthew Brown is an earth dam located in Union County, Iowa, built in 2018. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 325 ft long, taller than 68% 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 Matthew Brown
The primary purpose of Matthew Brown 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 Matthew Brown (private). It impounds the Trib to Thompson River near Grand River.
The dam stands 30 feet tall and stretches 325 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 28 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 | Union |
| Nearest City | Grand River |
| River/Stream | Trib to Thompson River |
| Coordinates | 41.03990, -94.08700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 325 ft |
| Year Completed | 2018 (8 years old) |
Storage & Hydraulics
| NID Storage | 28 acre-ft |
| Max Storage | 28 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 177 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Matthew Brown |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04303 |
| Federal ID | IA04303 |
| More Info | State Dam Safety Program |