Title 18R
DESIGN CRITERIA AND IMPROVEMENT STANDARDS1
Chapter:
   18R.04   Application and Definitions
   18R.08   Design Criteria
   18R.12   Improvement Standards
   18R.36   Subdivision Improvement Requirements
   Table:  (Tables follow Chapter 18R.08)
   Figure:  (Figures follow Tables)
   Standard Plans:  (Standard Plans follow Chapter 18R.12)
   Standard Plans S-1 through TN-22
   NOTE:   Footnotes are numbered throughout the text and are located at the end of this title.
Chapter 18R.04
APPLICATION AND DEFINITIONS
Section:
18R.04.010   Application of title.
18R.04.020   Definitions.
18R.04.010   Application of title.
   A.   The design criteria set forth herein are provided for the purpose of insuring that subdivision and nonsubdivision public right-of-way and private street improvements constructed within the city are designed in such a manner that each meets or exceeds uniform levels of sound engineering practice and that the individual elements contained therein have a uniform level of development with no single element overdesigned to the detriment of another.
   B.   The improvement standards set forth herein are to insure that subdivision improvements and nonsubdivision public right-of-way and private street improvements are constructed in such a manner that they meet or exceed a uniform level of quality workmanship and construction.
   C.   The design criteria and improvement standards set forth herein may be modified by the advisory agency incident to approval of a subdivision or any other entitlement or authorization provided for in Title 18 of this code upon making any of the findings provided for in Section 18.44.020 of Title 18 of this code. In addition, the design criteria and improvement standards set forth herein may be modified by the community development or public works departments incident to approval of a building permit, encroachment permit or any other permit or authorization requiring their approval upon making any of the findings provided for in Section 14.14.075 of Title 14 of this code.
(Res. No. 9 77-78 (part), Res. No. 110 86-87 §1, Ord. 1935 §8, Res. No. 133 95-96 §8, Res. No. 150 96- 97, Res. No. 113-07, Res. No. 19-13)
18R.04.020   Definitions.
   For the purpose of this title, the following words and phrases shall have the meanings defined in this section unless from the context a different meaning is intended; provided, however, that whenever any word or phrase used in this title is not defined, but is defined in Title 1, Title 14 or Title 18 of this code, such definitions are incorporated herein and shall be deemed to apply to such words and phrases when used in this title:
   A.   “Accessway” means a parcel of land not dedicated as a public street but intersecting or connecting with a public or private street for which a private easement for road purposes has been granted to the owners of the property contiguous or adjacent thereto.
   B.   “Backup lot” means a lot which has a rear yard which abuts an arterial street. See also Figure 1.
   C.   “Block” means a parcel of land, containing one or more lots, surrounded on all sides by a street.
   D.   “Construction specifications” means the construction specifications of the city.
   E.   “Contractor” means the person responsible for the actual construction of a subdivision or public right-of-way improvement.
   F.   “Curb return” means that portion of a curb which provides a curved transition in alignment between two curbs on intersecting streets.
   G.   “Culvert” means any storm drainage conduit (other than an open channel) including a storm drainage pipe and box culvert structure which conveys surface water runoff beneath a street, easement or right-of-way.
   H.   “Dead-end street” means a street which is closed to through traffic.
   I.   “Density” means the residential density established by the Chico General Plan Land Use Element expressed as a number or range of dwelling units per gross acre. The number or fraction of gross acres contained in a site shall include the entire lot area measured in a horizontal plane together with the area between the property line and centerline of all abutting streets.
   J.   “Design speed” means the vehicular speed which serves as the basis for the horizontal and vertical alignment criteria of a street.
   K.   “Double frontage lot” means a lot which has access to more than one street. See also Figure 1.
   L.   “Easement” means an interest in, on or over land owned by another that entitles the holder to a specific limited use.
   M.   “Engineer” means the public works director of the city or a qualified designee.
   N.   “Flag lot” means a lot so shaped and designed that the main building site area is set back from the street on which it fronts and includes an accessway not less than fifteen feet in width at any point connecting such main building site area to the frontage street. See also Figure l.
   O.   “Freeboard” means the distance between the design high water line and either the bottom surface of a bridge or a box culvert deck, the inside crown elevation of a storm drainage pipe or the top elevation of the bank of a storm drainage ditch containing the flow.
   P.   “Functional street classification” means the classification of a street according to its function in the circulation pattern established by the general plan of the city.
   Q.   “Grade” means the reference line by which the elevation for the pavement and other appurtenant features are established.
   R.   “Highway Design Manual” means the Highway Design Manual of the State of California Department of Transportation.
   S.   “Lateral” means the initial storm drain or sewer conduit connecting the source of the flow to the main line of the storm drain or sewer system.
   T.   “Community development department” means the community development department of the city.
   U.   “Private street” means a privately owned and maintained street which is not a part of the street system of the city.
   V.   “Profile” shall be used interchangeably with “grade.”
   W.   “Reserve strip” means a narrow strip of land extending along the exterior boundary of a subdivision or at the dead end or side of a dedicated street.
   X.   “R value” means a coefficient representing the resistance to a deformation of a saturated soil at a given density which is determined by State of California Department of Transportation Test Method No. 301-F.
   Y.   “Side-on lot” means a lot which has a side yard which abuts an arterial street. See also Figure l.
   Z.   “Soils report” means a soil investigation and geological reconnaissance report prepared by a registered civil engineer, engineering geologist or geologist specializing and recognized in soil mechanics and foundation engineering.
   AA.   “Standard plans” means the standard plans of the city of Chico.
   BB.   “Standard specifications” means the standard specifications of the State of California Department of Transportation.
   CC.   “State standard plans” means the standard plans of the State of California, Department of Transportation.
   DD.   “Street” means any public street, avenue, road, parkway, boulevard, thoroughfare, highway, square, crossing, intersection, lane, alley, court or any other public place or way of whatever nature, located within a right-of-way, publicly maintained and open for use by the public for the primary purposes of vehicular and/or pedestrian travel. “Street” includes street surfacing, concrete curb, gutters and sidewalks, and all other improvements constructed within such right-of-way which are commonly considered a part of the public street system of the city.
   EE.   “Superelevation” means the cross-slope of a traveled street which counteracts the effect of centrifugal force on a vehicle.
   FF.   “Traffic index” means a coefficient used in the design of a street structural section and which represents predicted truck traffic volumes.
(Res. No. 9 77-78 (part), Res. No. 57 82-83 §§1, 2, Res. No. 59 90-91 §l, Res. No. 02 03-04, Res. No. 113- 07, Res. No. 19-13)