Duluth UDC § 1011.04

1. The maximum slopes for cut and/or fill shall be 2:1 (2 feet of horizontal run for each foot of rise or fall), except for the following: earthen dam embankments, rock cuts, where certified by a professional geotechnical engineer, or as discussed in Section 1011.05. 2. Earthen dam embankments shall be 3:1 maximum unless a modification application is approved. The intent of the earthen dam embankment slope regulation is to provide for public safety, soil stability, and dam maintenance considerations. The depth of cut referred to herein shall be the maximum cut or fill that shall be allowed to occur in any one section of cut or fill. The slope of cut or fill shall be uniform throughout for each section of cut or fill unless benching is approved by the Planning and Development Department. When a cut is made in rock that requires blasting, the slope may be steeper if presplitting is employed and upon submission of a geotechnical report which substantiates the integrity of the rock in the steeper condition, subject to the review and approval of the Director. (Note: No blasting shall occur unless a permit has been obtained from the Fire Marshal’s Office.)