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ently, shall terminate in a circular ~urn--around, <br />having a minimum right-of--way diameter of one <br />hundred (100) feet or a "T" shaped ~urning space <br />with a right-of--way of no~ less than sixty (60) feet <br />and a length of each.stub of not less than thirty <br />(30) feet or more than fifty (50) feet. <br /> <br />boundary of =rao~ for future extension of adjoining <br />property) may be provided with a "T" shaped turning <br />space in the place of the required turning circle. <br />Right--of-way for the "T" shall no% be less than <br /> <br />(d) <br /> <br />Easements across the entire length of lots, even if <br />a par~ of the lot is underwater or pa~ of a natural <br />wazercourse, or cenzered on rear or side lot lines <br />shall be provided for utilities and surface drainage <br />whez~e necessary, and shall be at leasz twelve (!2) <br />feet wide. The plat shall clearly szaze that it is <br />the obligation of abutting property owners zo keep <br />all drainage ditches open along said easemenns. <br /> <br />GRADES AND CURVES OF STREETS <br /> <br />(a) <br /> <br />No s~ree~ grade shall be less than 0.25 pemoen~. On <br /> <br />sewers are no~ p~ovided, the flowline grade Shall <br />no~ De less than O.~ percent. <br /> <br />The radii of curvature on the oen~er line of s~ree%s <br />shall not De less than the following: <br /> <br />Street Type <br />Arterial <br />External Collector <br />Internal Colleoto~ <br />Minor or Cul--de-sac <br /> <br />Radius Of Curvature <br /> !200' <br /> <br /> 200' <br /> 100' <br /> <br />A =angent a= leasz four hundred (400) feet long <br />shall be provided be%ween reverse =urves on arterial <br />S~ree~s, one hundred (!00) feet on collector <br /> <br />PORTSM~UT~ SUBDIVISION ORDINANCE --- PAGE 11 <br /> <br /> <br />