08/13/2003 P&Z Packet - Laserfiche WebLink

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'df iiidry 4, 2003 There is no plan for ground story plantings in the existing plan. If there is proposed sod for these areas, than these areas should be shown as irrigated. The plan should show intentions of ground story and cover for all landscaped areas including islands. All soils in these areas should be thoroughly tilled with at least an additional 4" of topsoil added before tilling. Norway maples and Amur maple should be substituted with a non-invasive species. White oaks in this area would be more appropriate than Lindens. Since there are a number of oaks proposed for removal from this site, oaks should be paced back in. Additional oaks should be required around the maintenance pond. There should be a tree inventory submitted that is in data base form and readable. It is difficult to tell from the plan how many oaks and what size oaks are proposed for removal. Several more oaks should be planted in the "S", and East Side of the Retail Building area of the landscape plan to screen housing to the East later. Oaks should be substituted for Laurel leaf willow on the East Side of the Retail Building. The Pre - settlement vegetation for this area is depicted on Exhibit 6. The lighting plan should be tow- impact, "no- spill ", downward focused, minimum lumen type of focus with any canopy enclosures unlit. The existing lighting descriptions do not meet this requirement. This plan needs revision. Surface Water Management is very important on this site. Existing and proposed water conveyance systems indicate a direct connection to Baldwin Lake by h developer ��.. by the ditch. Since this is in a lake protection area, the developer should show creativity in attenuating volume and quality issues. Post development should try to lower volumes, maintain required rates, and reducing nutrient loads. Pre and post - nutrient modeling should be demonstrated. Surface water direction on impervious areas should be directed to curb drops by the pond if this can be made to work. It appears that before ditching, water flowed to Rice Lake and had a bit more buffer before reaching the Lake. This might be an alternative. The Anoka County Sand Plane Ground Water Modal depicts this area as very sensitive to ground water pollution potential. (Exhibit 5). Any infiltration anticipated or planned should have at least the 3 -foot minimum recommended separation from the seasonally high water table. If the proposed pond is large enough to contain all surface water storm events for a 100-year flood, h Qn the environmental concerns become much less. 2