10-21-7: ROADS:
   A.   Road Layout And Geometry:
      1.   The city road standards are made part of this title by reference. The design and arrangement and construction of all roads, public and private, shall be in conformance with the road standards, the provisions of this title, and any city design guidelines as adopted.
      2.   Road systems shall provide efficient internal circulation, reasonable access to public highways, minimize congestion and unsafe conditions, and shall be in conformance with the city general plan.
      3.   The arrangement of roads shall provide for the continuation of major roads between adjacent properties when the continuation is necessary for the convenient movement of traffic, emergency or maintenance vehicles, or the efficient provision of utilities. Proposed streets shall be continuous and in alignment with existing planned or platted streets with which they are to connect.
      4.   Roads shall be designed to provide emergency access and egress for residents, occupants and emergency equipment providing width, curve radii and strength for emergency and maintenance vehicles used by or available to the city.
      5.   Where the potential traffic impacts on the existing street systems are considered to be great, or in the case of unique circumstances concerning topography or street layout, the subdivider may be required to prepare a detailed engineering study of the road system.
      6.   Proposed streets shall intersect one another as nearly at right angles as topography and other limiting factors of good design permit. "T" intersections rather than "cross" intersections shall be used wherever possible for local streets.
      7.   Where a road does not extend to the boundary of the development and its continuation is not required, its terminus should be no closer than fifty feet (50') from the boundary.
      8.   Strips of land reserved to control or restrict access to perimeter or stubbed roads shall be utilized only where the reserve strip is deeded to and accepted by the city.
      9.   Lawful right of vehicular access must be demonstrated before the city will issue a building permit. (Ord. 2012.04, 1-18-2012)
      10.   The installation of curbs, gutters, sidewalks and improvements of streets to centerline, if street is already improved with asphalt or centerline, plus ten feet (10') where the street is not improved with asphalt, as approved by the city in accordance with its ordinances and specifications, shall be required on any existing or proposed street adjoining a lot on which a building permit application for construction is made. Street improvements are required for new home construction or remodel for change of use or commercial use. Such curbs, gutters, sidewalks and street improvements shall be required as a condition of obtaining a building permit. The city may require a property owner to make an equivalent payment for the labor and materials necessary to install curb, gutter, sidewalk and asphalt, as calculated by the city engineer, in lieu of requiring the property owner to install the requisite improvements. Any required dedication of property for such improvements shall be conveyed to the city by quitclaim deed for immediate installation or for such future time as it becomes prudent for the city to install the said improvements. (Ord. 2014.02, 6-12-2014)
      11.   Excessively long and straight streets which are conducive to high speed traffic shall be prohibited.
      12.   Every cul-de-sac and permanent dead end street shall comply with the following requirements:
         a.   End at a turnaround area having a radius no less than fifty feet (50') and an all weather surface;
         b.   Not exceed six hundred fifty feet (650') in total length.
      13.   Temporary dead end streets, intended as access to future development parcels, shall be a minimum of one lot depth in length (or as determined by the planning commission) and shall meet all of the other requirements for permanent dead end streets set forth in subsection A12 of this section.
      14.   Driveways, mailboxes, fire hydrants and all other obstructions at such turnaround areas shall be designed in such a way as to provide an area for the piling of snow.
   B.   Road Grades:
      1.   Intersections, switchbacks and cul-de-sacs shall not exceed a twelve percent (12%) grade, with cul-de-sac area having a maximum grade of six percent (6%).
      2.   No public or private roadway or street shall exceed a fifteen percent (15%) grade, except that grades up to fifteen percent (15%) for public or private roadways and streets may be allowed by the planning commission upon review and finding that all of the following conditions are met:
         a.   No more than ten (10) residential units are served by the over twelve percent (12%) section or the lots have separate, emergency access that does not exceed twelve percent (12%).
         b.   For roadways of twelve percent (12%) or greater grade, the applicant shall stake the centerline and both edges in the field for the inspection of the city engineer to assure full compliance with this section.
         c.   Such other reasonable conditions the planning commission deems necessary to protect the health, safety and/or welfare of city residents and public safety officers under all the factual circumstances existing in each application.
         d.   When approval has been granted for a roadway in excess of twelve percent (12%), the security requirements may be adjusted to require a security instrument in excess of one hundred twenty five percent (125%) in order to cover the cost of removal and reclamation of such roadway, should constructed roadway exceed the above conditions.
         e.   Roadways and streets exceeding a fifteen percent (15%) grade shall not be permitted. If new roads are constructed with actual as built grade steeper than fifteen percent (15%), they must be rebuilt to fifteen percent (15%) or less or the area reclaimed to natural conditions.
         f.   All streets and roads with grades in excess of twelve percent (12%) shall also comply with the requirements set forth in chapter 16, article A of this title.
   C.   Street Names:
      1.   Each street that is a continuation of, or an approximate continuation of, any existing dedicated street shall be given the name of such existing street. When any street forms a portion of a proposed street previously ordered by the city council to be surveyed, opened, widened or improved, the street shall be given the name established in said city council order.
      2.   The names of newly created streets shall not duplicate or nearly duplicate the names of any streets in the city or in adjacent areas of Washington County.
      3.   Any named street shall also have the proper compass direction coordinate as approved by the public works department and/or city engineer.
      4.   Subdividers are encouraged to do an investigation of local history regarding the names and references to geological and historical features located in the subdivision and wherever possible incorporate the historical names and references into the names and designations of streets. (Ord. 2012.04, 1-18-2012)