Chapter 16.17
DESIGN AND IMPROVEMENT STANDARDS
Sections:
16.17.010 General lot development requirements.
16.17.070 Road and streets--Development requirements.
16.17.090 Streets--Side slopes--Right-of-way widths.
16.17.100 Streets--Design specifications.
16.17.005 Generally.
Subdivision design and improvements shall be required as set forth in this chapter. (Ord. 808 (part), 2001)
16.17.010 General lot development requirements.
A. The size and shape of lots shall be such as are proper for the proposed use, locality, and topography in which the subdivision is situated and shall be not less than any applicable zoning ordinance requirements.
B. Lots without frontage on a street shall not be permitted.
C. The side lines of lots shall run at right angles to the street upon which the lot faces, as far as practicable.
D. Lots having double-frontage with depths of less than two hundred feet should be discouraged except where necessitated by topographic or other physical conditions.
E. Corner lots shall have extra width, sufficient to permit the maintenance of building lines on both front and sides.
F. All lots shall be suitable for the purposes for which they are intended.
G. In all cases where sewage is to be handled by individual septic tank drainage, the subdivider shall present a written statement from the country health officer certifying that sewage can be satisfactorily disposed of on each lot by septic tank method.
H. Where water is proposed to be supplied by individual wells on each lot, and sewage is proposed to be disposed of by individual septic tank method, the subdivider shall present a written statement from the county health department certifying that the functions of water supply and septic tank drainage can be satisfactorily accomplished on each lot. (Ord. 808 (part), 2001)
16.17.020 Blocks.
A. Blocks shall not be longer than one thousand two hundred feet between intersecting street lines, except on major streets and thoroughfares where longer blocks may be required.
B. Improved walkways (public access easements) not less than ten feet in width may be required to be dedicated through long blocks where necessary to provide access to schools, parks, scenic easements, or lake frontage. (Ord. 808 (part), 2001)
16.17.030 Easements.
Easements not less than five feet wide shall be required on each side of all lots and the rear of all lots where necessary for poles, wires, drainage, and water services or other utilities. (Ord. 808 (part), 2001)
16.17.040 Watercourses.
Existing natural or proposed relocated watercourses shall be shown as easements, and storm drains shall be placed in easements. The planning commission or city engineer may require watercourses to be placed entirely in underground conduits. Surface drainage facilities shall be adequately fenced or otherwise improved to provide for public safety and an aesthetically pleasing environment. (Ord. 808 (part), 2001)
16.17.050 Monuments.
Durable survey monuments approved by the city engineer shall be installed or referenced to the following locations:
A. Boundary corners;
B. At intervals of not more than five hundred feet along boundary lines;
C. At the beginning and end of property line curves or points of intersection, at the discretion of the city engineer;
D. Lot corners. (Ord. 808 (part), 2001)
16.17.060 Setbacks.
Building setbacks shall be required at least as great as the applicable zoning requirement. (Ord. 808 (part), 2001)
16.17.070 Road and streets--Development requirements.
A. Existing streets shall be continued as required by the planning commission in accordance with the Lakeport general plan.
B. Street stubs shall be required to be extended to adjacent unsubdivided property where, in the opinion of the planning commission, they are necessary.
C. Streets shall intersect at as near right angles as practicable. Radius of curvature, where the property lines intersect, shall be a minimum of twenty feet.
D. “T” or three-way intersections are preferable to four-way intersections, but may not be located closer than one hundred fifty feet to any other intersection.
E. Reserve strips, when required to control access to over certain lot lines or over the ends of street stubs, shall be dedicated to the city.
F. Alleys may be required to be dedicated and constructed where necessary to control access to thoroughfares and major streets.
G. Cul-de-sac streets shall have the following limiting dimensions:
1. Forty feet minimum radius to property line on streets in hillside areas;
2. Fifty feet minimum radius to property line on all other streets;
3. Five hundred fifty feet maximum length from the intersecting street line to the center of the cul-de-sac (longer cul-de-sac streets may be allowed when the cul-de-sac serves twelve or less lots or when, or in the opinion of the planning commission, the land contour or subdivision design justifies a greater length).
H. Names for proposed new streets shall be submitted on the tentative map.
I. Streets, rights-of-way, and easements shall be offered for dedication and maintenance. The city may, at its option, accept or reject any such offer.
J. Streets shall conform, as to alignment and width, to the transportation element of the general plan, as required by the planning commission.
K. Minimum center radius on streets shall be:
1. Major streets, five hundred feet;
2. Collector streets, two hundred fifty feet;
3. Flat and hillside residential, one hundred feet;
4. Steep hillside residential, seventy-five feet. (Ord. 808 (part), 2001)
16.17.080 Street grades.
Grade specifications are as set out in this section:
A. Maximum permitted, fifteen percent. However, where topography makes it necessary, grades of not more than twenty percent may be allowed for distances not to exceed four hundred feet from point of intersection to point of vertical curve, when approved by city engineer;
B. Normal minimum permitted, one percent. Absolute minimum permitted, three-tenths percent, when approved by city engineer.
C. Maximum grade permitted on switchbacks or curves with a radius of less than two hundred feet shall not exceed ten percent. (Ord. 808 (part), 2001)
16.17.090 Streets--Side slopes--Right-of-way widths.
A. Street design shall conform to the city’s engineering standards.
B. Where side slopes of street embankments extend onto private property, slope easements shall be required.
C. Minimum right-of-way width for alleys in commercial and industrial areas shall be thirty feet with thirty feet of paving, and in multiple-family areas, right-of-way shall be twenty-four feet and paving width shall be twenty-four feet. (Ord. 808 (part), 2001)
16.17.100 Streets--Design specifications.
A. All rights-of-way shall provide slope easement. Parkways or integral curb and sidewalk are optional on approval of the planning commission.
B. Right-of-way, construction width, and other street design criteria:
1. Local streets in flat areas (zero percent to ten percent cross slope) cross-section, any lot:
|
Right-of-way |
50 feet |
|
Improved street |
34 feet |
|
Sidewalk, both sides |
4 feet |
|
Planting strip, both sides |
4 feet |
2. Local streets in hillside areas (ten percent to fifteen percent cross slope) cross-section for lot size eight thousand five hundred square feet and above:
|
Right-of-way |
40--50 feet |
|
Improved street |
30--34 feet |
|
Sidewalk, both sides |
4 feet |
|
Planting strip, both sides |
4 feet |
3. Commercial, industrial, or collector streets in flat areas (zero percent to ten percent cross slope) cross-section, any lot:
|
Right-of-way |
50--60 feet |
|
Improved street |
40 feet |
|
Sidewalk, both sides |
5 feet |
|
Planting strip, both sides |
5 feet |
4. Commercial, industrial, or collector streets in hillside areas (ten percent to fifteen percent cross slope) cross section for lot size eight thousand five hundred square feet and above.
|
Right-of-way |
60 feet |
|
Improved street |
34--40 feet |
|
Sidewalk, both sides |
5 feet |
|
Planting strip, both sides |
5 feet |
5. Arterial streets:
|
Right-of-way |
60--66 feet |
|
Improved street |
40--56 feet |
|
Sidewalk, both sides |
4--5 feet |
|
Planting strip, both sides |
5 feet |
(Ord. 808 (part), 2001)