Ordinances-2003-260

ix. A Drainage Plan of the development and a NPDES Permit No. 2 if applicable as it relates to the prescribed roadway right-of-way. x. Any miscellaneous details, as necessary or required by the City of Tiffin. xi. An estimate of cost shall be prepared and shall be based on unit prices for individual work items. xii. An estimate of time to complete the project shall be submitted to the City of Tiffin for approval. Once approved by the Planning and Zoning Commission and the City Council a progress schedule shall be developed and submitted. c. Soil Surveys Soil surveys may be required as deemed necessary by the City Engineer. Such surveys shall be conducted prior to the completion of the final engineering plans and specifications to determine the existence of unsatisfactory subgrade materials or the need for remedial underground drainage. The results of the soil survey shall be submitted along with the engineering plans and specifications for review by the City of Tiffin. d. Drainage Study i. U.S.G.S. map delineating the site and the boundaries and area of all watershed and subwatershed areas affecting the site. ii. A drainage plan of the site delineating existing and proposed watershed and subwatershed areas; proposed drainage facilities; and design volumes and velocities of all structures, systems, and ditches. iii. Computation as per the IDOT Manual, supporting the design of all proposed facilities, including, but not limited to; drainage areas, runoff coefficients, frequencies, volumes, velocities, methods of design, and other, as required by the City of Tiffin. e. Traffic Impact Study