16.18.160 Street Design and Improvements.
   A.   Streets. The street design shall conform both in alignment and width to the general plan circulation element and the rights-of-way for these streets shall be dedicated to the city. The street design shall conform to any proceedings affecting the division of land which may have been initiated or approved by the council or approved by the council upon initiation by other legally constituted authorities of the county or state, and shall be subject to the approval of the city engineer.
   B.   Alignment of Streets. All streets shall, so far as practicable, be in alignment with existing adjacent streets by continuations of the established or mapped center lines or by adjustments with curves.
   C.   Intersections. Street center lines shall be required to intersect one another at an angle as near to the right angle as is practicable by tangents not less than one hundred (100) feet in length.
   D.   Extensions, Cul-de-sacs. Where necessary to give access to, or provide for a satisfactory future subdivision of adjoining land, streets shall extend to the boundary of the land being divided and the resulting dead-end or cul-de-sac streets shall require a turn-around. In all cases, unless specifically excepted by the city engineer, the turn-around shall have a minimum curb-to-curb diameter of fifty-six (56) feet. Cul-de-sac streets shall not exceed six hundred sixty (660) feet in length in a high fire hazard area and one thousand three hundred twenty (1,320) feet in length in a nonhazardous area.
   E.   Intersection Corner Rounding. Whenever a street intersects another street, the property lines at each block corner shall be rounded with a curve having a radius of not less than twenty-five (25) feet. A greater curve radius may be required by the city engineer if streets intersect at other than right angles.
   F.   Curve Radii. The center line curve radii on all streets shall conform to accepted engineering standards of design and shall be subject to the approval of the city engineer.
   G.   Grades of Streets.
      1.   Street grades for local streets may only exceed twelve (12) percent when engineering design shows that the grade proposed is safe and that the lesser grade would deny access to land appropriate for use. The street grades shall be subject to the review of the city engineer and fire chief.
      2.   Street grades shall not be less than 1.0 percent unless approved by the city engineer.
(Ord. 337 § 13, 2005; Ord. 293 § 1 (part), 2004; Ord. 182 § 2 (part), 1997)