Ordinances-2012-319

serve additional areas. The Storm Sewer System shall be constructed in compliance with the City of Tiffin, Iowa Design Standards. 1) The storm water drainage system shall be separated and independent of any sanitary sewer system. The acceptable standard for sizing storm sewers is to be a five-year, 24 hour storm event or as specified under current design standards. 2) Under some circumstances the City may require, as a condition for approval of the plat, installation of a storm sewer system that is larger than necessary to meet the needs of the platted area, but necessary to complete the City storm sewer system as it relates to both the area being platted and other areas. In such event, the city shall pay on a prorata basis for the excess cost over that which is necessary to service the subdivision itself. Other subdivisions which connect with the systems shall on a prorata basis reimburse the city for the cost of the additional system, which shall service that subdivision and meet all city specifications. 3) Storm sewer facilities shall be located in the road right-of-way where feasible, or in the perpetual unobstructed easements of appropriate width. 4) In the storm sewer design phase, the subdivider shall study the effect of each subdivision on existing downstream drainage facilities outside the area of the subdivision. The subdivider's drainage studies together with such other studies as shall be appropriate shall serve as a guide to needed improvements. Where it is anticipated that the additional runoff incident to the development of the subdivision will overload an existing downstream drainage facility, the Council may withhold approval of the subdivision until provision has been made for the recovery of the cost for the improvement of said potential condition in such sum as the