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STREET · TYPE RIGHT-OF-WAY PAVED WIDTH <br />Arterial 100 60 <br /> <br />External Collector <br /> <br />6O 36 <br /> <br />Internal Collector <br /> <br />60 36 <br /> <br />Minor or Cul de sac 50 <br /> <br />30 <br /> <br /> Marginal Access 50 30 <br /> <br /> Alley 24 24 <br /> <br /> (b) All dead-end streets, designed to be so permanently, <br />shall terminate in a circular turn-around, having a minimum <br />right-of-way diameter of !00 or a "T" shaped turning~space with <br />a right-of-way of not less than 60 feet and a length of each <br />stub of not less than 30 feet or more than 50 feet. <br /> <br /> (c) Temporary dead-end streets (streets carried to <br />boundary of tract for future extension of adjoining property) <br />~may.bep~ovided with a."T" ~aped turning space in the place <br />of the required turning circle. Right-of-way for the "T" shall <br />not be less tha~ 60 feet. <br /> <br /> (d) Easements across lots or centered on rear or side <br />lot lines shall be provided for utilities and surface drainage <br />where necessary, and shall be at least 12 feet wide. The Plat <br />shall clearly state that it is theobligation of abutting <br />property owners to keep all drainage ditches open along said <br />easements, and this provision shall be included in the deed of <br />each lot affected. <br /> <br />Section 32-17. Grades and curves of streets. <br /> <br /> (a) No street grade shall be less than 0.25 percent. <br />On streets where curb, gutter, catch basins, and storm sewers <br />are not provided, no grade shall be less than 0.4 percent. <br /> <br /> (b) The radii of curvature on the center line of streets <br />shall not be less than the following: <br /> <br />STREET TYPE <br /> <br />RADIUS OF CURVATURE <br /> <br />Arterial 1200? <br /> <br />External Collector <br /> <br />650' <br /> <br />-14- <br /> <br /> <br />