* Prior ordinance history: Ords. 278, 542 and 542-A.

The road department will consult the general plan for the minimum required road right-of-way except in such cases where a designation does not exist. In these cases, the road commissioner or his designee will assign a designation to provide a safe and efficient road system while assuring access to existing and future development. The road designations and their minimum required right-of-way will be in accordance with the following:
A. Freeway and highway; the minimum as defined by the California Department of Transportation (Caltrans) or, the American Association of State Highway and Transportation Officials (AASHTO) standards;
B. Expressway; the minimum as defined by the California Department of Transportation (Caltrans) or, the American Association of State Highway and Transportation Officials (AASHTO) standards;
C. Principal arterial; a minimum right-of-way one hundred feet wide;
D. Minor arterial and collector; a minimum right-of-way eighty feet wide;
E. Local roads; a minimum right-of-way sixty feet wide;
F. Frontage and/or alleys; a minimum right-of-way forty feet wide. (Ord. 278N § 8(part), 2004).

A. Except as permitted by this chapter, driveway access to lots shall be from the driveway location within the lot’s deeded frontage or offered for dedication frontage as depicted on the subdivision map.
B. Driveway access shall be certified by a registered civil engineer, licensed in the state of California and shall include the following representations:
1. The driveway can be constructed in the location shown on the tentative and final maps in compliance with the requirements of Public Resources Code Section 4290 and county development standards. If it is determined that a driveway cannot be constructed for each lot, the applicant will be required to file an amended tentative map which will provide driveways to each lot as re-recorded on the map.
2. The driveway meets the AASHTO or Caltrans requirements for adequate sight distance to permit safe road access.
C. The road commissioner or his designee, in his discretion, may permit design exceptions to allow driveway access at other points within the lot frontage so long as the driveway meets the requirements of Public Resources Code Section 4290, county development standards, and AASHTO or Caltrans requirements for adequate sight distance to permit safe road access, unless the access rights have been waived. If access rights have been waived, the driveway must be constructed in the exact location shown on the recorded subdivision map. (Ord. 610 § 1, 2005).

The proposed location of road right-of-way will be approved by the road department. All proposed road improvements and appurtenances will be located within right-of-way. In the event that cut and/or fill or any proposed improvement necessitates additional right-of-way, it will be included on the final map. Proposed right-of-way must:
A. Continue along the centerline of existing right-of-way (where applicable);
B. Include ninety-degree angles where road right-of-way intersections exist and/or are proposed;
C. Centerline curve radii must meet either Caltrans or AASHTO standards; and
D. Will extend to property lines and/or existing right-of-way in such a manner as to permit future access. (Ord. 278N § 8(part), 2004).

Prior to recording the final map, a road maintenance mechanism will be created. This will either be a county maintenance district or service area. The applicant will submit this as part of his application:
A. Letter to the road department summarizing the request and stating the total acreage involved in the proposed district;
B. Applicable non-refundable county application fee and “California State Board of Equalization” filing fees based on district acreage involved;
C. Written geographic description of the proposed district;
D. Maps showing the proposed district/annexation per California State Board of Equalization requirements;
E. List of assessors parcel numbers within the proposed district;
F. Engineer’s report with estimated maintenance cost for a twenty-year maintenance plan, meeting the requirements of Proposition 218. (Ord. 278N § 8(part), 2004).

Prior to the recordation of a final subdivision or parcel map, the developer must either construct or post security to construct at a later date all road related improvements. In either case, proposed construction will be approved by the road commissioner or his designee.
A. Where road construction is proposed within an existing public right-of-way, the developer will apply for encroachment and construction permits at the road department. Prior to any construction, these permits must be approved by the road department.
B. Where road construction is proposed within an area to be offered for dedication or grant deeded to the county, but such action has not been recorded, the developer will apply for a construction permit at the road department. Prior to any construction, this permit must be approved by the road department.
C. The application materials for these permits will include a plan and profile for all proposed road structure, or related improvements drawn to a scale approved by the road department, copies of R-value tests, calculations of storm drainage facilities, calculations of cut and fill, and an engineer’s cost estimate. The plans will include:
1. Existing and proposed property lines;
2. Topographic contours at intervals approved by the road department;
3. Existing fences, buildings and any infrastructure;
4. Existing tree driplines and the identification of the types of trees;
5. A vicinity map;
6. Typical cross sections and construction details;
7. Proposed improvements; and
8. Any other information deemed appropriate by the road commissioner or his designee. (Ord. 278N § 8(part), 2004).

The design and construction of all roads and road appurtenances will be the responsibility of the developer, who will employ a California registered civil engineer and/or a California registered land surveyor to do all survey work and, a California registered civil engineer to do all road and road appurtenance design, construction supervision and inspection. (Ord. 278N § 8(part), 2004).

Documentation of all road and road appurtenance construction will include:
A. A written statement signed and stamped by a California registered civil engineer, which attests to the fact that the road and all road appurtenances were designed and constructed in accordance with county code and adopted standards (either CALTRANS or AASHTO);
B. Copies of compaction tests and inspection logs; and
C. Reproducible as-built plans, signed and stamped by a California registered civil engineer or, California licensed land surveyor. (Ord. 278N § 8(part), 2004).

All construction documentation must be submitted for review and approved by the road department prior to the recordation of the final map except when a bond or other acceptable form of security is offered. When such security is accepted by the board of supervisors in order to defer construction, construction documentation will be submitted for review and approval to the road department thirty days following construction completion. (Ord. 278N § 8(part), 2004).

The geometric design of all roads and road appurtenances will be in accordance with county standard road specifications and, for any concept not mentioned, either CALTRANS or AASHTO standards. Pavement design will be based upon R-value tests and will conform to county standard specifications. A traffic index will be prescribed by the road department. In the event that traffic generation calculations are required, the developer will use the Institute of Transportation Engineers (I.T.E.) latest standards. If such standards do not describe the land uses under study, the road department will approve alternate sources. (Ord. 278N § 8(part), 2004).

All road or road related construction will comply with county standard road specifications and for any concept not mentioned, CALTRANS standards. (Ord. 278N § 8(part), 2004).

In the event that there exists a compelling reason or reasons to make a road design exception, the California registered civil engineer in charge of the project may request such an exception in writing. The request, made directly to the road commissioner, will contain a sound engineering analysis. The road commissioner will grant or deny such a request within thirty days of submittal. Cost will not be considered a compelling reason. The road commissioner may only grant a road design exception when it will not affect public safety and welfare and, when the exception is in accordance with state and federal law, alternative mitigation may be required by the road commissioner if granted. (Ord. 278N § 8(part), 2004).

The subdivider may be required to dedicate and improve walkways if deemed appropriate by the road commissioner or his designee. (Ord. 278N § 8(part), 2004).

The maximum grade for a driveway on a parcel or lot which was approved prior to the adoption of this code revision will not exceed sixteen percent. The planning commission and board of supervisors may grant a variance to this provision pursuant to Chapters 17.60 or Section 17.72.230. (Ord. 278N § 8(part), 2004).