Duluth UDC (unnumbered, p.191: Illustrative Examples of Structural Buffers)

Illustrative Examples of Structural Buffers d. Disturbance or Encroachments. 1. Ditches, swales, stormwater conveyance facilities, stormwater detention ponds, sanitary sewer conveyance facilities, similar facilities, and any associated easements, shall not encroach into a buffer except that necessary access and utility crossings (e.g. stormwater or sanitary sewer pipes) may encroach into the buffer as near to perpendicular as practical. 2. Supplemental plantings or re-plantings of vegetation, or authorized non-vegetative screening devices shall be allowed to encroach into a buffer provided there is minimal disturbance of any significant existing vegetation. 3. Land disturbance is authorized in areas of a buffer that are devoid of significant vegetation provided that the final grade and re-plantings of vegetation meet the screening requirements contained herein. 4. Dying, diseased, or dead vegetation may be removed from a buffer provided minimal disturbance occurs. Vegetation thus removed shall be replaced where necessary to meet the screening requirements contained herein. e. Protection during Land Disturbing Activities. 1. During authorized land disturbing activities, buffers shall be clearly demarcated and protected prior to commencement of, and during, construction. 2. The method of demarcation and protection utilized shall be in accordance with best management practices or as required by the Planning and Development Department. 3. Also see the Procedures and Permits Article of this Development Code for requirements.