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200 feet or more of uninterrupted stalls. Interior parking area trees will be provided at the rate of one tree for each 20 surface parking spaces provided, or a fraction thereof. Parking area landscaping will be contained in planting beds bordered by a raised concrete curb or equivalent approved by the Planning Commission. D). Boulevard Plantin~s: The proposed Twin Lakes Parkway corridor will become the major focal point of the landscaping for the site. Evergreen trees will comprise one- half of all plant materials. Shade trees and understory ornamentals will then comprise the other half of the plantings. Perennials will be used selectively along the right-of- way. Perennials will have a minimum bed size of 40 square feet. Trees, evergreens, and ornamentals will be chosen from the following list: Common Name Botanical Name Red Maple Pin Oak American Linden River Birch Red Splendor Crab Spring Snow Crab Black Hills Spruce Ponderosa Pine Techny Aborvitae Acer rubrum Quercus Palustris Tilia americana Betula nigra Malus 'Red Spendor' Malus 'Spring Snow' Picea glauca densata Pinus ponderosa Thuja occidentalis 'Techny' E). Minimum Lands~pe Area: At least 20 percent of the total land area under development will be landscaped with grass, approved ground cover, or shrubbery and trees. At least 5 percent of the land area within a parking lot will be landscaped. For this purpose, the exterior of the parking lot will be defined as the area within the outside peripheral curb defining the parking areas and access drive directly contiguous to such parking areas. F). Plant Size Requirements: At major entrances, all entrance and boulevard trees will be of specimen quality. Deciduous trees will be at 3 inches in diameter when planted. All ornamentals will be a minimum of2 inches in caliper and specimen quality. Evergreen trees will have a minimum height of 6 feet, with an average height in a varied planting of 7 feet. Shrubs will be from a 5 gallon pot or larger. For perimeter plantings, evergreen trees will be a minimum of 4 feet in height with an average of 5 feet in height overall. Shade trees will be a minimum of2 1/2 inches in caliper. Deciduous shrubs used for screening will be 2 feet in height at planting. Evergreen shrubs will have a minimum spread of 18 inches. All other shrubs will be from a 3 gallon pot or larger. All areas will be sodded except where naturalized grasses are used. G). UnderiVound Irri~ation: Underground irrigation will be provided to all sod plantings or seeded areas unless otherwise noted. The site will provide all planting areas April 1996 RLK Associates, Ltd. PUD Design Standards City of Roseville 5