01/31/2001 Env Bd Packet - Laserfiche WebLink

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CYAN storm runoff in bio - swales. The APPLICANT will be proposing to meet and exceed all landscaping requirements. The perimeter of the property is landscaped with a combination of evergreen and deciduous trees and shrubs. Landscaping will be incorporated throughout the site. Planted islands will also be incorporated into the parking lots and along drive aisles to provide for parking lot definition. A variety of landscaping materials the plant pallet consists largely of plant materials that are unique to Minnesota and more native to Lino Lakes to improve the aesthetics of the parking and drive areas. Minimum sizes for plant materials are as follows: Potted/Bare Root B &B Shade Trees: 2" dia. 2" dia Half Trees: 6 -7' ht. 1 %s" dia. Evergreen Trees: 3 -4' ht. Tall Shrubs: 3 -4' ht. 3-4' ht. Low Shrubs: 18 -24" ht. 18 -24" ht. Screening of the trailers and tractors parked in the loading docks will occur by the construction of a 65' -0" long by 15' -0" height masonry wall. SITE GRADING AND NEW WATER QUALITY TREATMENT PONDS Site grading will occur to facilitate construction of the SuperTarget Store and other retail shops, construction of parking lots, islands, structural soils planting beds; two water quality ponds, berms and swales for the creation of bio - swales and bio - retention basins. Existing site soil regime is of a naturally high infiltration media. Classified by the Soils Conservation Service as Zimmerman fine sand soils type and a Category A soils. Drainage calculations (see Exhibit F) for the predevelopment 100 -year event computed a total site runoff of only 1.54 cfs. In order to maintain the post - development runoff rates at the predevelopment rates two (2) ponds with storage above normal water level and a bio- retention basin are planned on the site. Pond 2 is centrally located on the southern property line. Pond 1 is near the northeast corner of the site and the bio- retention basin is in the southeast comer. Pond 2 capturing runoff from Apollo Drive and parking lot area west of Apollo is planned to have a National Urban Runoff Program (NURP) volume of 1.64 acre -ft and a wet storage capacity of 2.12 acre -ft and discharge to the bio- retention basin at a maximum of 10.32 cfs. Pond 1 capturing roof runoff from the SuperTarget and three major retail shops west of Apollo as well as parking and drive isles is planned to have a National Urban Runoff Program (NURP) volume of 5.26 acre -ft and a wet storage capacity of 6.12 acre -ft and discharge to the bio - retention basin at a maximum of 2.88 cfs. Drainage calculations are submitted with this narrative for verification purposes. (See Exhibit F) The bio- retention basin in the southeastern corner is an existing wetland (Basin A). This area is planned to have installed 40 vertical infiltration tubes, a berm, landscaping, and a pipe of 6 PARSONS TRANSPORTATION GROUP earmn•Aschman • Da Laaw. Lather, • Steinman Town Center Narrative Page -12 - 01/15/01