WHITE RIVER MATERIALS - FLIPPIN Stormwater Outfall, Flippin, Arkansas

WHITE RIVER MATERIALS - FLIPPIN is a stormwater outfall located at 4029 U.S. 62 in Flippin, Marion County, Arkansas. This facility manages stormwater runoff from a ready-mix concrete manufacturing plant, classified under NAICS 327320. As a stormwater outfall, it discharges collected runoff into local waterways, operating within the regulatory framework of the US Clean Water Act and EPA's NPDES MS4 permit program. The facility's primary technical function is to control and treat stormwater runoff from an industrial catchment. In Arkansas, stormwater outfalls at industrial sites are typically regulated under NPDES industrial stormwater permits, which require best management practices (BMPs) for pollution prevention. The ready-mix concrete sector often involves exposure to materials like cement, sand, and aggregate, making sediment and pH control key concerns for stormwater management. This outfall contributes to local stormwater management in the White River watershed, which supports diverse aquatic habitats. Proper operation helps prevent erosion and pollutant discharge, aligning with community and environmental goals for water quality in the region. The facility's location in a rural area with karst topography underscores the importance of effective stormwater controls to protect groundwater resources.

The facility is located in the White River watershed in northern Arkansas, an area characterized by karst geology with sinkholes and caves that make groundwater particularly vulnerable to contamination. Stormwater runoff from industrial sites like ready-mix concrete plants can carry sediment, alkaline pH, and trace metals, posing risks to aquatic ecosystems. Effective stormwater management is critical to protect the White River's water quality, which supports recreational fishing and drinking water supplies downstream.