In order to ensure compliance with the requirement for a Storm Water Pollution Prevention Plan, every Subdivider/Developer shall provide the following:
(A) Topography plans showing all existing and proposed grades, culverts, ditches, inlets, and other storm water management features, along with:
(1) Detention calculations and a site plan detailing total drainage area and breakdown of land usages, time of concentration, existing peak discharge for each design storm, existing and proposed runoff coefficient, and total required detention; and
(2) The location of proposed detention facilities detailing limits of ponding for each design storm and total available volume, detail of outlet structure(s), and calculations showing peak discharge from outlet structure(s) for each design storm.
(B) The Village Engineer, on a case-by-case basis, shall have the authority to require additional information for a proper review and to grant variations from those requirements in this Section that may not apply.
(C) Any storm water design calculations reviewed and approved by the Illinois Department of Transportation shall serve as fulfilling the requirements in this Section provided that the developer submits documentation of such approval.
(D) The minimal design requirements of this Chapter shall not be construed to relieve the Subdivider/Developer of any legal responsibilities for downstream/upstream storm water damages inflicted by runoff or backup from the development.