Sirmon Runway Pit Stormwater Outfall, Daphne, Alabama | United States

Sirmon Runway Pit is a stormwater outfall located in Daphne, Alabama, within the United States. This facility is part of the stormwater management infrastructure serving the Baldwin County region, handling runoff from urban and transportation-related surfaces. As a stormwater outfall, it discharges collected stormwater into receiving waters, playing a key role in flood control and water quality management. The facility operates under the regulatory framework of the US Clean Water Act, which governs stormwater discharges through the National Pollutant Discharge Elimination System (NPDES). In Alabama, the Alabama Department of Environmental Management (ADEM) administers the NPDES program, including permits for municipal separate storm sewer systems (MS4s) and industrial stormwater discharges. The outfall likely falls under a general permit or a local MS4 permit, requiring compliance with water quality standards and best management practices. Sirmon Runway Pit contributes to the environmental health of the Daphne area by managing stormwater runoff from roads and nearby developments. Proper operation helps reduce flooding risks and minimizes pollutant loads entering local water bodies, such as Mobile Bay. The facility's location near a runway suggests it may also handle runoff from airport or industrial activities, necessitating careful monitoring to protect downstream ecosystems.

The facility discharges stormwater into the Mobile Bay watershed, a sensitive estuarine ecosystem that supports diverse aquatic life and recreational activities. Urban and transportation-related runoff can carry pollutants like sediment, heavy metals, and hydrocarbons, which may impact water quality. The outfall's operation is subject to NPDES permit conditions that require implementation of stormwater control measures to mitigate these impacts. Local rainfall patterns and coastal flooding risks further influence the facility's design and management.