Specifications include, but are not limited to: 1) Capture and treat stormwater runoff from approximately 16.4 acres of highly impervious surfaces on the A-B Tech Campus. 2) Remove an existing asphalt parking lot and reduce total impervious cover by 0.64 acre. 3) Construct an interconnected stormwater treatment train system consisting of two infiltration basins and a stormwater wetland, with a total storage volume of 77,300 cubic ft. 4) Establish native rain garden and wetland vegetation to provide habitat for pollinators and other wildlife. 5) Provide a walking path, observation area and educational components for the A-B Tech community. 6) Provide stormwater volume and peak flow reduction, improve water quality and reduce the urban heat island impact. 7) Install a flow splitter that will direct smaller water quality storms to flow through the surface green infrastructure system. Excess flow from larger storms will bypass the green infrastructure system and continue to flow into the existing 30-inch diameter subsurface system. 8) The project will connect to the downstream Haith Branch restoration project and the A-B Trek trail system to provide both educational and recreational value to the larger community. 9) The system will reduce peak flows and stormwater volumes from the campus for all storm events from the 1-inch rainfall through the 100-year storm compared to existing conditions.
