(A) The developer's engineer shall submit copies of design computations for the required improvements which shall include, but shall not be limited to, the following:
(1) Stormwater detention reservoir capacity and outlet control design.
(2) Structural design of pavements.
(3) The design of watermain size, maximum daily flow demands and fire flow determinations.
(4) Design of inlet spacing, storm sewer systems and open channels.
(5) Design of sanitary sewer systems.
(6) Structural design for storm sewer, sanitary sewer, and water conduits.
(7) Design of street lighting conductor and conduit sizing and luminaire spacing, including voltage drop and photometric calculations, to document compliance with the requirements listed in § 153.50.100.
(8) Engineer's estimate of probable construction cost for all required development improvements, broken down by individual pay items with quantities, unit prices and total costs.
(B) The design computations shall be prepared in legible format that can be readily followed, including design assumptions, references, manufacturer's catalog cut sheets and other relevant data. The computations shall be signed, dated and sealed by a Professional Engineer registered in Illinois.
(C) The design computations for required improvements shall be submitted to the city simultaneously with the preliminary plan and subdivision plat.
(Ord. 18-008, passed 2-7-18)