CHAPTER 13

DESIGN STANDARDS AND RIGHT OF WAY REQUIREMENTS

SECTION:

11-13-1:		Intent
11-13-2:		Design Standards
11-13-3:		Street, Roadway And Alley Widths, Cul-De-Sacs And Easements !2R!

11-13-1:		INTENT:

It is the intent of this chapter to:

A.	Set standards for the right of way and design of all city streets and roads; and

B.	Establish requirements for any new development of city streets and roads. (Ord. 9-7-2000, 9-7-2000)

11-13-2:		DESIGN STANDARDS:

Design and typical cross section of streets and roadways will be designated by the city council, in accordance with soil conditions, but shall not under any circumstances be less than the standards established by the Castle Valley special service district. (Ord. 9-7-2000, 9-7-2000)

11-13-3:		STREET, ROADWAY AND ALLEY WIDTHS, CUL-DE-SACS AND EASEMENTS:

A.	Street Right Of Way Widths For New Development: Rights of way for residential, collector and arterial streets shall conform to the following widths:

1.	Residential streets within a large scale development shall have a minimum width of sixty feet (60').

2.	Collector streets shall have a minimum width of seventy two feet (72').

3.	Arterial streets shall have a minimum width of ninety nine feet (99').

B.	Minimum Width Of Roadway Surface Wherever Curb And Gutter Are Installed: Minimum width, from curb face to curb face, of roadways wherever curbs and gutters are installed shall be as follows:

1.	For all residential streets, forty eight feet (48').

2.	For all collector streets, sixty feet (60').

3.	For all arterial streets, eighty seven feet (87').

C.	Minimum Width Of Roadway Without Curb And Gutter: Minor roads which do not serve any existing or planned future development may be installed without curb and gutter, and shall have a minimum pavement width of twenty eight feet (28'), or as directed by the city council.
D.	Alleys: Alleys shall have a minimum width of twenty feet (20'). Alleys may be required in the rear of business lots, but will not be accepted in residential blocks except under unusual conditions where such alleys are considered necessary by the planning and zoning commission.

E.	Reverse Curves: Reverse curves in the horizontal alignment of streets shall be separated by a tangent of at least one hundred feet (100'), unless in the opinion of the planning and zoning commission, such is not necessary.

F.	Street Intersection: Street intersections shall be as near to perpendicular as site conditions permit. Residential streets shall approach collector or arterial streets at an angle of not less than eighty degrees (80̊). Offsets in street alignment at intersections of more than ten feet (10'), but less than one hundred twenty feet (120') shall be prohibited.

G.	Street Grades: The minimum required grade for all streets shall be 0.6 percent. The maximum permitted grade shall be 7.0 percent for arterial and collector streets and 10.0 percent for residential streets.

H.	Street Curves: Where the street alignments within a block deflect from each other at any one point more than ten degrees (10̊), there should be a connecting curve. The radius of said curve for the inner street line should not be less than three hundred fifty feet (350') for arterial streets, two hundred fifty feet (250') for collector streets, and one hundred feet (100') for residential streets. The radius of the curve for the outer street line shall be the sum of the inner radius and the roadway width.

I.	Curbs: Curbs at all intersections shall be rounded with curves having a minimum radius of fifteen feet (15') for residential streets and twenty five feet (25') for collector and arterial streets. Property lines at street intersections should be rounded with a curve where necessary to fit the curb radius, except where the curb will connect to existing city streets.

J.	Street Names: New street names should not duplicate those already existing. A street which is obviously a continuation of another already in existence should bear the same name. Before the street is named, the proposed name must be submitted to and approved by the planning and zoning commission.

K.	Street Dedications: All streets shall be dedicated for public use. The dedication of half streets is prohibited, unless approved by the city council.

L.	Relation To Adjoining Street System: The arrangement of the streets in new development shall make provision for the continuation of the existing streets in adjoining areas (or their proper projection where adjoining land is not subdivided) at the same or greater width (but in no case less than the required minimum width) unless variation is deemed necessary by the planning and zoning commission. The street arrangement must be such as to cause no unnecessary hardship to owners of adjoining property when they plat their own land and seek to provide for convenient access thereto. Where, in the opinion of the planning and zoning commission, it is desirable to provide for street access to adjoining property, the dedication of rights of way for proposed streets shall be extended to the boundary of such property.

M.	Cul-De-Sacs: Cul-de-sacs (dead end streets) shall be used only where unusual conditions exist which make other designs undesirable. Each cul-de-sac shall have a minimum right of way dimension of not less than one hundred twenty feet (120') in diameter. Surface water must drain away from the turnaround, except that where surface water cannot be drained away from the turnaround along the street, due to grade, necessary catch basins and drainage easements shall be provided.
N.	Easements: Where alleys are not provided, easements of not less than eight feet (8') on each side of all rear lot lines and side lot lines will be required where necessary for poles, wire, conduits, storm or sanitary sewers, gas and water mains, and other public utilities. Easements of greater width may be required along public property lines where necessary for surface overflow or for the extension of sewer mains or similar utilities. (Ord. 9-7-2000, 9-7-2000)