2. Slopes

  • Slopes shall be designed with full consideration of landscaping requirements. Cut and fill slopes shall be no steeper than 2 horizontal to 1 vertical.
  • Drainage shall be directed away from the faces of cut and fill slopes or into approved drainage structures. The faces of cut and fill slopes shall also be manufactured to control erosion. This control may consist of stepping or other surface protection, as approved by the City Engineer. The protection for the slopes shall be installed within 15 days after completion of the rough grading.
  • Slopes required to be planted shall be provided with an approved system of irrigation. See Section VI for details.
  • Recommendations in the soils report shall be incorporated into the design of any slope.

E. TEMPORARY EROSION CONTROL DESIGN CRITERIA

Temporary Erosion Control Plans shall be submitted prior to October 1. The control devices shown on said plans shall be installed prior to November 1 and maintained in operable condition until April 15.

Temporary Erosion Control Plans shall provide for the following:

  1. Temporary soils stabilization measures shall be installed on slopes graded at 10:1 or steeper, and/or 10 feet or more in height. Contact the City's Landscape Architect for the approved methods of soil stabilization and planting mixes.
  2. Desilting facilities at all drainage inlets for the graded site shall be designed for a 25-year storm intensity. They must be detailed on the plan. Design and specific recommendations shall be submitted for the following:
  3. Desilting basin volume based on gradient, inflow, and nature of soils.
  4. Distribution extent of all graded areas and identification of any temporary soil stabilization measures.
  5. Size of desilting basin outlet pipe and nonerosive overflow.
  6. Dike requirements; dimensions, percent compaction, etc.

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