(A) Cut slopes shall be no steeper than two horizontal to one vertical (2:1). In special circumstances as determined solely by the Director of Public Works, slopes steeper than 2:1 may be approved.
(B) Slope stability analysis shall accompany soil engineering reports for all slopes steeper than 2:1 and for all slopes exceeding 40 feet in height, regardless of the slope ratio. The soil engineer shall consider both gross and surficial stability of the slope and provide a written statement approving the slope stability.
(C) Where public streets are to be underlain by bedrock which is excavatable by grading equipment but cannot be excavated with conventional trenching equipment, the Director of Public Works may require a zone in the street to be undercut and replaced as compacted fill to facilitate placement of utilities without resorting to blasting. No rock blasting shall be permitted unless approved by the City Council.
(D) Any grading plan which proposes cut slopes steeper than 5:1 and having a vertical height of six feet or greater shall be subject to the review and approval of the planning commission prior to permit issuance.
(Ord. 1449, passed 10-19-05)