The Walley Pit Stormwater Outfall, Fairhope, Alabama | United States

The Walley Pit is a stormwater outfall located in Fairhope, Alabama, within Baldwin County. As a stormwater outfall, it functions as a discharge point for stormwater runoff from the surrounding urban and industrial catchment areas. The facility is operational and plays a role in managing stormwater in the region, which is subject to the US EPA's NPDES MS4 permit program under the Clean Water Act. The facility operates under the regulatory framework of the National Pollutant Discharge Elimination System (NPDES), which governs stormwater discharges from municipal separate storm sewer systems (MS4s). In Alabama, the Alabama Department of Environmental Management (ADEM) administers the NPDES program. The Walley Pit is likely part of a Phase II small MS4 system, given its location in a smaller city like Fairhope. The NAICS code 212321 indicates an industrial activity related to construction sand and gravel mining, which may influence the stormwater characteristics. Stormwater outfalls like The Walley Pit are critical for preventing localized flooding and managing runoff quality before it enters receiving waters. The facility's discharge may impact nearby water bodies, including Mobile Bay, which is an ecologically significant estuary. Proper operation and maintenance are essential to minimize pollution from urban runoff and protect downstream aquatic habitats.

The Walley Pit discharges stormwater into the Mobile Bay watershed, a large estuary that supports diverse marine life and is important for local fisheries. Urban runoff from Fairhope and surrounding areas can carry pollutants such as sediment, nutrients, and heavy metals, which may affect water quality in the bay. The facility's location in a coastal region with high rainfall increases the importance of effective stormwater management to reduce flooding and erosion.