Designer of record for this Project. State Road (SR) 826 (Palmetto Expressway) and SR 836 (Dolphin Expressway) are major limited access, urban freeways connecting the north, south, east and west of Miami-Dade County, Florida. These expressways consist of 16.7 miles of north-south corridor and 7.0 miles of east-west extension with interchanges at major urban arterial crossings. The intent of this Stormwater Management Master Plans was to identify the drainage systems within the project limits, the existing drainage conditions, water quality and quantity analysis of the proposed drainage system and detailed calculations and final hydraulic analysis. The SR 826 / 836 Interchange Project (Interchange Project) consists of approximately 5.4 miles of corridor improvements including pavement resurfacing, bridge rehabilitation, roadway reconstruction, and canal relocation. The Project limits of construction for SR 826 are from 1,270 feet south of Flagler Street to 1,375 feet south of N.W. 25th Street, and for SR 836 (Dolphin Expressway) from N.W. 87th Avenue to N.W. 57th Avenue. The Interchange Project lies entirely within the South Florida Water Management District’s (SFWMD) C-4 Canal Basin and ultimately discharges into the C-4 (Tamiami) Canal. The stormwater conveyance of the expressway corridor is accomplished through five existing secondary canal systems. These secondary canal systems are the Fontainebleau Canal, the North Line Canal, the Venetian Canal, the Airport Canal, Lake Joanne. and the Blue Lagoon Lake. All of these existing secondary conveyance systems ultimately discharge to the C-4 Tamiami Canal. The SR 826 / 836 Interchange Project Stormwater Management Report was prepared as part of the Environmental Resource Permit (ERP) modification package to be submitted to SFWMD and the Department of Environmental Resource Management (DERM). The Interchange Project also considers the Florida Departme