Ordinances-1995-197

Local Streets - Minimum 6" Portland Cement Concrete roadway with integral curb and gutter for local streets. Collector Streets - Minimum 7" Portland Cement Concrete roadway with integral curb and gutter for collector streets. Arterial Streets* - Minimum 9" Portland Cement Concrete roadway with integral curb and gutter for collector streets. 1) All concrete to be Portland Cement Concrete conforming to IDOT C-3 mix standards, ASTM C143 consistency standards, and other standards as prescribed by the City of Tiffin Technical Specifications. 2) Any roadway constructed for commercial or industrial use are to be constructed to meet the minimum recommended standards of the Iowa Department of Transportation, and are to be reviewed by the City Engineer. *Thickness requirements for arterials are intended as a guide only. Specific projects will be designed on the basis of soil conditions and projected traffic loading. 5) The developer's engineer shall make a minimum of one set of concrete test cylinders for each 1,000 square yards of paving but no less than one set per day. A test set shall consist of three test cylinders. Slump and air content tests shall be made and the results recorded along with appropriate test cylinder information. Cylinders shall be laboratory cured, and conform with ASTM specification C31 and C39 6) The subgrade shall be scarified to a depth of 8 inches below the pavement, and compacted to 90% of Modified Proctor Density. F) Railroads and Limited Access Highways: Railroad right-of-ways and limited access highways where so located as to affect the subdivision of adjoining lands shall be treated as follows: 1) In residential districts a buffer strip at least one-hundred (100) feet in depth in addition to the normal depth of the lot required in the district shall be