02/27/2008 Env Bd Packet - Laserfiche WebLink

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• • • ENVIRONMENTAL BOARD MEETING JULY 25, 2007 4. Recommend 1 -2 inch scrapping the wetland soils in the freeze /thaw situation to control reed canary grass. Also recommend the scraped soils in wetland fill areas be salvaged and stockpiled for use in the wetland mitigation area. 5. In general, there should be a narrative to the Boards and the City Council addressing all of the mitigation strategies presented in the AUAR that effect this development. 6. All infiltration areas and wetland mitigation areas should be seeded with the city native seed mix. The city transitional mix is shown on the plan and this is a good mix between cultural areas and wetland/pond areas. The BWSR U8 mix is shown on the wetland mitigation slopes. A better mix selection from the BWSR choices would be the WI mix. However, I would again recommend the city native pond seed mix for this area, supplemented with flowering native plugs every 10 feet. All biofiltration areas should also be supplemented with flowering plugs. Biofiltration areas planted with the transitional seed mix should have a low - profile height associated with the forbes. All native seed mix areas should be planted by a contractor on the Minnesota Department of Natural Resources list of contractors. The native areas should be maintained for a minimum of 3 years by the approved contractor and if possible burned at the end of 3 years. 7. More trees should be planted particularly in type C and D soils. The C type soils intersect biofiltration pond number 9 and wetland mitigation area 10 on the north side, east side, south side and south west comer. Salix `Golden Curls' is a marginally hardy plant and non - native. The AUAR recommends that water infiltration areas be augmented with large herbaceous woody plant materials such as Aspen and Cottonwoods. Therefore substituting more of these types of species and more abundantly in the type C soil areas is in accordance with the AUAR recommendations. Cottonwoods must be of the non - seeding types. Recommend one tree per 25' O.C. in these type C soil areas. 8. Side slope of the wetland mitigation area be no steeper than 6:1 horizontal to vertical. 9. Site access for maintenance reasons must be shown on the plan for stormwater treatment areas. 10. A letter be written to the City Engineering adding issues to the project Storm Water Pollution Prevention Plan 11. Keep parking stalls down to the minimum allowed by zoning code. Add pervious paving if additional parking stalls are necessary. 12. Lighting should not exceed the city minimum lighting allowed by city code. Canopy lights of the gas station must be flush mounted bulbs that present no glare issues and downward directed. Monuments should be kept to a minimum and minimize light spill. 3 DRAFT MINUTES