01/26/2005 Env Bd Packet - Laserfiche WebLink

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IThe following gable defines each of these zones. Buffer Zone Description The City is rarely able to achieve the desired buffer on projects, so other design features are used to make up the difference. These features include on- the -lot infiltration plans, swales, and infiltration, ponds and re- vegetation with native plants. The developer is proposing no development beyond the wetland flagging. This gives approximately 143 feet between the OHW level and proposed construction. An infiltration pond on the southern side of the south lot will help attenuate water volume and sediment transport concerns. Re- establishing native plants and conservation easement in this area is important from a protection standpoint. Signage should be posted and new ownership notified at the time of purchase of this protection area. Water from lot impervious surfaces should be directed to open space areas where infiltration can be maximized. Access to the Pond for inspection and maintenance should be indicated on the plan. A Conservation Easement should cover this area, or better yet this area be deeded over to Anoka County Regional Parks if it acceptable to them. Tree Preservation The grading plan (Attachment 5) and GIS image (Attachment 8) shows a substantial amount of woodland area removed due to water swales on Tots 2 and 3. The developer was asked to direct water away from the proposed houses on lots 2 and 3. Their solution was to remove more trees and grade swales on the North sides of the lots. A solution may be to swale the water to the South between the houses. Some pipe may have to be used in order to do this. This is a trade -off between high - quality woodland preservation and pervious surface water flow. My suggestion on this one is to allow some pipe and perhaps design some rain gardens in front of Lots 2 and 3.