A. The maximum surface gradient on any artificially created slope without a retaining structure shall be two feet of horizontal run to one foot of vertical fall (2:1). This gradient may be increased to that gradient which can be demonstrated through engineering calculations to be stable, if, in the opinion of the director, it has been demonstrated by the applicant through engineering calculations performed by a qualified professional engineer that surface erosion can be controlled to that erosion rate equal to a properly stabilized 2:1 slope under the same conditions.

B. Any rockery or other retaining structure greater than four feet in height must be permitted under a separate building permit issued by the city.

C. The applicant shall at all times protect adjacent private properties and public rights-of-way or easements from damage occurring during development. The applicant shall restore private property and public improvements damaged by his/her operations.

D. The applicant shall be responsible for obtaining and coordinating all required state or federal permits associated with the disturbance of wetlands or other regulated activities. (Ord. 1169 § 2, 2009).