02/22/2006 Env Bd Packet - Laserfiche WebLink

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• from construction activities by silt fence. The developer should understand that the City may ask for a more substantial tree protection fence in areas where grading and construction approaches save areas. In addition to tree locations, the map shows soil types, delineated wetlands, and flood plain areas. I have supplemented this map with GIS Attachments 2, 3, 4, and 11. Trees for the most part are smaller diameter Boxelder, and Siberian Elm typical of a previously disturbed site. There are also select areas of Eastern red Cedar, Scotch Pine, and White /Blue Spruce. Significant Resources Considerations. There are no documented National Registry plants or animals on this site. Although not documented on the site, there are other areas of the City where we have found rare plant communities that have the same ecologic signature as an area on this site. See Attachment 11. Pinned areas on the map show areas on the edge or in the flood plain on Iw soils where one expect these plants to exist. This is one of the reasons the level one habitat /greenway area is shown dipping into this parcel. One other site observation is the City Blandings Turtle Model predicts Blandings Turtles breeding and activity areas to the North and East. This site is an excellent place to start obtaining connectivity through the level one habitat area to the designated Greenway area to the NE. A Conservation Easement or Fee Title to flood Plain Wetlands on the North Side of this property should be given. A rare plant survey should be required for this proposed development area to substantiate any existing plants. • It is unclear to me if the developer is showing the required 10 buffer around wetland areas to the North. A wider buffer is preferable. Type three wetlands proposed to be filled on the South side of the plan will have to be mitigated on a two for one basis somewhere in the sub - watershed. I have inquired with RCWD concerning their findings. All wetland mitigation area, pond areas, and disturbed buffer areas of remaining wetlands must be seeded with the City native seed mix. Signs along a requested Conservation Easement should be placed on the boundary every 100 to 150 feet. All pond and infiltration, and spillway areas must show a public access for maintenance needs. Forbays should be incorporated into pond and spillway areas in order to keep sediment out of existing wetland Native seed should be used at any spillway overflow areas. There is a concern for the spillway over flow. The spillway is questionably and empirically small and a good amount of surface water is flowing to it. One might expect sedimentation to occur periodically into the wetland area. We do not want this to occur. The Pond area on the North and East sides are constructed into the flood plain and possible rare plant feature area. The ponds /wetland replacement area should be pulled out of this flood plain area and left undisturbed. The rare plant communities commonly found in these areas are dependent on flood plain. It