Banning Municipal Code Ch. 18.12 Grading Design Standards

Unless otherwise recommended by the geotechnical engineer, and engineering geology reports, or both, and approved by the city engineer, cuts slopes shall be no steeper than two horizontal to one vertical. All cuts and excavations shall conform to the provisions of this ordinance and the grading manual.

Exception: In the absence of an approved geotechnical engineering report, these provisions may be waived by the city engineer for minor cuts not intended to support structures.

(Ord. No. 1388, § 4, 7-14-09)

Unless otherwise recommended by the geotechnical engineer or engineering geology reports, or both, and approved by the city engineer, fills shall conform to the provisions of the grading manual.

Exception: In the absence of an approved geotechnical engineering report, these provisions may be waived by the city engineer for minor fills not intended to support structures.

(Ord. No. 1388, § 4, 7-14-09)

All setbacks and other restrictions specified by the grading manual are minimum and may be increased by the city engineer, pursuant to the recommendation of a civil or geotechnical engineer, to prevent damage to adjacent properties from erosion or to provide access for slope and drainage structure maintenance. Retaining walls may be used to reduce the required setbacks when approved by the city engineer.

(Ord. No. 1388, § 4, 7-14-09)

Drainage facilities and terraces shall conform to the provisions of the grading manual unless otherwise approved by the city engineer.

(Ord. No. 1388, § 4, 7-14-09)

A. Cut and fill slopes shall be provided with subsurface drainage as necessary for stability, and as recommended by the geotechnical engineer, geologist, and/or engineering geologist.

B. All canyons and buttress fills shall be provided with subdrains approved by the city engineer.

(Ord. No. 1388, § 4, 7-14-09)

Stormwater runoff from lots or adjacent properties shall not be carried over cut or fill slopes steeper than five horizontal to one vertical (5:1). Such runoff shall conform to the provisions of the grading manual.

(Ord. No. 1388, § 4, 7-14-09)

Asphalt concrete pavement for surfacing of parking lots, private streets, driveways or other similar uses shall conform to the provisions of the grading manual unless otherwise approved by the city engineer.

(Ord. No. 1388, § 4, 7-14-09)

All site development and precise grading shall be designed to provide access to all entrances and exterior ground-floor exits and to normal paths of travel in accordance with California Disabled Access Regulations (California Code of Regulations, Title 24, Part 2).

(Ord. No. 1388, § 4, 7-14-09)

Development proposed in any hillside zoning district, open space district, or any hillside site shall conform to the following standards:

A. Development on lands with slopes of more than twenty-five percent is prohibited.

B. Development on plateaus shall include a one-hundred-foot building setback from all ridgelines or edge of plateau.

C. Ridgelines are to be preserved.

D. Natural hillsides above the toe of slope shall be preserved. The toe of slope for the purposes stated herein shall mean the dividing line between the land or rock formations where there is a noticeable break in the angle of slope.

(Ord. No. 1388, § 4, 7-14-09)