Agenda Packets - 1999/12/13 - Laserfiche WebLink

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Sharp Wetland Buffer Permit 2551 Ridge Lane December 13, 1999 Page 2 Rocky Keehn, a certified wetland hydrologist with SEH, indicated that the construction of a house and resulting impervious surface would not have a detrimental impact upon the adjacent wetland. The limited filling of flood storage capacity and subsequent creation in excess of that removed would be in keeping with the City's Local Water Management Handbook requirements. Mr. Keehn also indicated that the physical distance between the house and wetland is sufficient for buffering and would act as a natural filtration of any stormwater runoff. Tony Brough, inspector for the Rice Creek Watershed District, performed a site inspection and confirmed the wetland boundary as delineated by Arlig Environmental,Inc. to be valid. Standards for Approval: No buffer permit shall be issued unless the City finds and determines that the proposed development complies with the following standards: (1) Any alteration shall not cause a reduction in the flood storage capacity of the wetland. Flood storage capacity shall be determined by analysis of the runoff from the entire developed wetland drainage district resulting from both the 2-year and 100 year frequency, 24-hour SCS Type I distribution storms. While there is no alteration planned to the wetland itself, there will be an alteration (filling) of flood storage capacity. a area to be filled, which is shown cross-hatched on the attached survey, represen cubic feet of lost flood storage capacity, defined to be that area below the 893.1 eleva . . To replace this loss, the survey shows the creation ..' ..� additional cubic feet of flood storage capacity, which will more than compensate for proposed area to be filled. (2) Any alteration shall not reduce the existing water quality enhancement value of a wetland under conditions of ultimate development, during both the 2-year and 100 year frequency, 24-hour SCS Type I distribution storms. Water quality enhancement value of a wetland shall be determined using methods approved by the City. As stated above, there would not be any filling of the wetland itself and there is substantial buffering between the home and the wetland to provide for adequate filtering. (3) Any alteration shall not reduce the existing wildlife habitat value of a wetland as measured using methods approved by the City. It is not anticipated that the construction of a house on this lot would reduce the habitat value of the adjacent wetland. (4) Alterations shall be carried out so as to minimize the impact on vegetation. Removal of vegetation within a wetland zoning district shall be permitted only when reasonably required for the placement of structures and use of property. (Ord 602, 8-25-97)