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Item No. q Staff Report No. 91- .031-1 Meeting Date: May 5, 1997 • Type of Business: Work Session WK: Work Session;PH:Public Hearing; CA:Consent Agenda;CB:Council Business City of Mounds View Staff Report To: Mayor and City Council From: Pamela Sheldon, Community Development Director Item Title/Subject: Proposal for Revising Wetland Zoning Regulations (Section 1010) Date of Report: May 1, 1997 Summary: Section 1010 of the Mounds View Municipal Code establishes Wetland Zoning Districts which include identified wetlands and a 100 foot buffer area surrounding each wetland. The regulations also require a permit be obtained for any development in a wetland zoning district. This permit is referred to as a wetland alteration permit. The authority for issuing permits is either administrative or by City Council, depending on the proposed activity. Discussion: Staff is proposing changes to Section 1010. The first set of changes has to do with the authority for issuing permits. The items which are now listed under administrative permits include: • 1. repair or maintenance of any lawful use existing on the effective date of the ordinance 2. alterations within the wetland buffer zone(which) do not extend into or impact the adjacent wetland 3. public or private utility work on existing facilities 4. installation and maintenance of fences 5. landscaping not including impervious surfaces 6. detached garages and accessory buildings 7. grading which does not adversely alter storm water storage capacity, storm water flow direction or runoff intensity 8. temporary structures not requiring permanent foundations or pads for support Staff is suggesting that building additions and impervious surfaces which are 864 square feet in size or less be added to this list. Since detached garages and accessory buildings may be reviewed administratively, we believe that it is appropriate for building additions of an equivalent size also be reviewed administratively. This would simplify the process for homeowners who want to add porches, decks, patios and room additions. We would also suggest that item number#7 be modified to allow administrative approval of grading that may change storm water flow direction or runoff intensity, if the City Engineer determines that the drainage design will manage the storm water so the quality, quantity and rate of inflow into the wetland after construction is substantially the same as before construction. Finally, item#2 needs to be clarified. It appears to say that any • work done in the buffer area is allowed with administrative approval. We do not believe that is what was meant, nor is that how we have been administering the regulations. Our understanding