10/27/2004 Env Bd Packet - Laserfiche WebLink

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lit • Agenda Item 5C • Environmental Board Meeting Date: October 27, 2004 Topic: Mike Vaughan Subdivision Background: Application was received to plat existing homestead site at 600 Birch St to single family, 5 Tots, at approximately 0.4 acres each. Location map is included as (Attachment 1). The Minnesota Land Cover Classification lists this area as 26% to 50% impervious cover with deciduous trees (Attachment 9). Tree save areas are depicted on Grading, Drainage, and Erosion Control Plan (Attachment 5). Rare vegetation indicators are absent from the site. Analysis: Site Vegetation The Minnesota Land Cover Classification (Attachment 9) shows this area as 26% to 50% impervious cover with deciduous trees. There are no rare species or rare plant location indicators on the site (Attachment 10). Although the smaller plans submitted do not include a tree preservation plan, the developer has submitted a larger plan titled Tree Preservation Plan. The Plan shows 1.5' of protection for each inch of tree diameter in the protection areas. The protection areas can be seen as that area that falls outside the silt fence area of the Grading, Drainage, and Erosion Control Plan (Attachment 5), and trees within the proposed grade area. Although the Grade Plan shows three trees within the grade area as save trees, the Tree Preservation Plan shows 5 trees. Houses proposed for the site are walkouts. This should save as many trees as possible on the site. Additionally, the developer should be responsible for mitigating any oak wilt started on the site. Site Surface Water There are no flood plain areas on the site. There is flood plain on the publicly owned property immediately to the East. From the National Wetlands Inventory, there appears to be Type 7 wetlands on the eastern most boundaries. Type 7 wetlands are classified as wooded swamps with water within a few inches of the surface during the growing season. This area is shown on their Grading Drainage and Erosion Control Plan (Attachment 5). Surface Water is directed to rain gardens and ponds on the South and East side of the project. Rice Creek watershed District has not reviewed or responded to this proposal yet. The rain gardens, rain garden swales, and ponds should use the City Native seed mix, and the developer should hire a contractor experienced in native plant establishment to manage the establishment of this area for at least 3 years.