13-1-5-8: MUDSLIDE (MUDFLOW) PRONE AREAS:

   A.   All permit applications will be reviewed by the floodplain administrator to determine if the proposed development will be located within a mudslide area.

   B.   The reviewing process will determine if the proposed site and improvements will be reasonably safe from mudslide hazards. Factors to be considered in making this determination include, but are not limited to, the following:

      1.   Type and quality of soils.

      2.   Evidence of ground water or surface water problems.

      3.   Depth and quality of any fill.

      4.   The overall slope of the site.

      5.   The weight that any proposed structure will impose on the slope.

   C.   When a proposed development is located in an area that may have mudslide hazards, the following will be the minimum requirements:

      1.   A site investigation and further review be made by persons qualified in geology and soils engineering.

      2.   The proposed grading, excavations, new construction, and substantial improvements are adequately designed and protected against mudslide damages.

      3.   The proposed grading, excavations, new construction and substantial improvements do not aggravate the existing hazard by creating either on site or off site disturbances.

      4.   Drainage, planting, watering, and maintenance be such as not to endanger slope stability.

   D.   When a proposed development is determined to be within a mudslide hazard area, the following requirements will include, but not be limited to:

      1.   Adopting and enforcing a grading ordinance in accordance with data supplied by the federal emergency management agency.

      2.   Regulate the location of foundation systems and utility systems of new construction and substantial improvements.

      3.   Regulate the location, drainage and maintenance of all excavations, cuts and fills and planted slopes.

      4.   Provide special requirements for protective measures including, but not necessarily limited to, retaining walls, buttress fills, subdrains, diverted terraces, and benchings.

      5.   Require engineering drawings and specifications to be submitted for all corrective measures, accompanied by supporting soils engineering and geology reports. (Ord. 624, 2-14-2008)