Design to reduce flood risk. Design should build upon best available flood risk data (at a minimum MSD, PDA, and concurrent Regional Watershed Management, Flood Mitigation & Green Infrastructure Plan). a) Conduct site surveys at locations identified in coordination with PDA. b) Runoff volume reduction capabilities of each Project shall be calculated by project design engineer. A reduction of runoff volume and total drainage area managed must be demonstrated and supported with calculations, site assessment, engineering and modeling, in coordination with regulatory agencies (MSD). Note: All public or private sewerage and drainage works proposed to be constructed, altered or reconstructed within MSD boundaries requires review and approval by MSD. This includes any altering of any storm drainage channel, site drainage or flood plain. c) Designed to be constructed to pass or exceed MSD Rules & Regulations (2018 or latest version) for private development. All projects must be designed and constructed in accordance with the following documents. (1) MSD’s Rules, Regulations and Engineering Design Requirements for Sanitary Sewage and Stormwater Drainage Facilities
