Layout Center #4125 Stormwater Outfall, Bentonville, Arkansas | US Stormwater Facility

Layout Center #4125 is a stormwater outfall located at 1102 SE 5th Street in Bentonville, Arkansas, within Benton County. This facility manages stormwater runoff from commercial and industrial areas, including NAICS codes 339950 (sign manufacturing), 452311 (warehouse clubs), and 452910 (department stores). As a stormwater outfall, it discharges collected runoff into local waterways, playing a key role in flood control and water quality management. The facility operates under the US EPA National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) program. Bentonville is part of a Phase II small MS4 area, requiring a stormwater management program to reduce pollutant discharges to the maximum extent practicable. The outfall likely includes best management practices such as detention basins or vegetated swales to treat runoff before discharge. Environmental significance includes protecting downstream water bodies in the Illinois River watershed, which flows into the Arkansas River. Stormwater runoff from urban and industrial areas can carry pollutants like sediment, heavy metals, and nutrients. Proper management at this outfall helps maintain water quality and aquatic habitat in receiving streams.

Bentonville is located in the Ozark Highlands ecoregion, characterized by karst topography with limestone bedrock and sinkholes. Stormwater runoff can rapidly infiltrate into groundwater, making pollution control critical for protecting drinking water sources and springs. The Illinois River, a tributary of the Arkansas River, receives stormwater discharges and is designated as an impaired waterbody for nutrients and sediment. Urban and industrial land uses in the catchment contribute to runoff volumes and pollutant loads.