Suisun City Municipal Code Art. III Erosion Control Standards

The purpose of the standards and basic design principles of erosion control as set forth in this article is to assure that development is accomplished so as to minimize the potential for erosion. Control measures are to apply to all aspects of the proposed grading, and are intended to be operational during all stages of development. The basic design principles set out in this article shall serve as minimum guidelines for erosion, sediment and runoff control plans. For specific information on erosion and sediment control measures, refer to the latest edition of the "Manual of Standards for Erosion & Sediment Control Measures" developed by the Association of Bay Area Governments.

(Ord. 629 (part), 1996: Ord. 443 § 621-5(part), 1980)

Stripping or burning of vegetation, grading or other soil disturbance shall be done in a manner which will minimize erosion.

(Ord. 443 § 621-5(A), 1980)

Existing natural vegetation shall be retained, protected and supplemented when feasible. Site development shall be accomplished so that existing trees can be preserved whenever possible and practical.

(Ord. 443 § 621-5(B), 1980)

Exposure of soil to erosion by removal of vegetation shall be limited to the smallest area practical and for the shortest time practical. Soil exposure shall not exceed an area in which development can be completed during a single construction season to ensure that soils are stabilized and vegetation is established in advance of the rainy season (October 15th-April 15th). When necessary, extension of the time may be granted by the director of public works.

(Ord. 443 § 621-5(C), 1980)

Facilities shall be constructed to retain sediment produced on the site.

(Ord. 443 § 621-5(D), 1980)

Sediment basins, sediment traps or similar required measures shall be installed in advance of any clearing or grading and maintained until removal is authorized in written form by the director of public works.

(Ord. 443 § 621-5(E), 1980)

Temporary seeding, mulching or other suitable stabilization shall be used to protect exposed erodible areas during development and in advance of the rainy season (October 15th-April 15th).

(Ord. 443 § 621-5(F), 1980)

Permanent control structures and final vegetation should be installed as soon as practical in the development, and a long-range maintenance plan developed and adhered to.

(Ord. 443 § 621-5(G), 1980)

Surface runoff rates in excess of predevelopment rates shall be retarded by appropriate structural and vegetative measures.

(Ord. 443 § 621-5(H), 1980)

Slopes, both cut and fill, shall not be steeper than two horizontal to one vertical unless a thorough geological and engineering analysis indicates that steeper slopes are safe and appropriate erosion control measures are specified.

(Ord. 443 § 621-5(I), 1980)

Disposal and/or storage of cleared vegetation and excavated materials shall be done in a manner which reduces the risk of erosion and shall strictly conform to the provisions of the approved grading permit. Topsoil shall be conserved for reuse in revegetation of disturbed areas whenever possible.

(Ord. 443 § 621-5(J), 1980)

Proposed development and roadway alignment should be designed to minimize erosion.

(Ord. 443 § 621-5(K), 1980)

Waterways shall be designed to avoid erosion as much as practical. Channels and slopes should be lined with grass or other appropriate vegetation. Every effort will be made to preserve natural channels and drainageways.

(Ord. 443 § 621-5(L), 1980)

Runoff shall be diverted away from denuded slopes or other critical areas with barriers or ditches.

(Ord. 629 (part), 1996)

Construction access routes should be limited and access points should be stabilized.

(Ord. 629 (part), 1996)

Clearing limits, easements, setbacks, sensitive or critical areas and their buffers; trees and drainage courses shall be delineated by marking them in the field.

(Ord. 629 (part), 1996)

A contingency plan shall be prepared in the event of unexpected rain or Best Management Practice (BMP) failure including, but not limited to, an immediate response plan, storing extra or alternative control materials on-site, notifying the local agency, etc.

(Ord. 629 (part), 1996)