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L Joe Samuel explained storm waterlsurface water drainage systems throughout the site. <br />� Ponding will be required to have infiltration in sandy soils. For water quality, the project <br />.� will collect a two-year, 2'/z inch rainfall. A series of ponds will capture the water. Chair <br />,1 Traynor asked if treatment in the ponds will be clean and attractive. (A two cell pond will <br />� be used to capture water in the first cell, then drain to a dry ce1L The first cell will be used <br />d� to capture sediment and debris for later clean up.) Fountains can be used to aerate the <br />? ponds. <br />�� The drainage areas into the lakes are similar with 41 acres (existing) to 42 acres <br />[�� (proposed) draining to the lake, but in a higher quality leveL (Water quality should <br />Y 1 improve in Langton Lake). <br />[� <br />[� Adam Arvidson, Landscape Architect, explained the design of green spaces and "green <br />E� layer". Links to Langton Lake will add more green space from the development. The <br />[ S green space of the park expands into the site. Mr. Arvidson explained that storm water <br />I�� management is now done within an amenity (Heritage Park in Minneapolis). Swales and <br />I� vegetation will be used for infiltration, including in parking lots. He explained trail and <br />I #� sidewalk plans. <br />L9 <br />�� <br />�] <br />i +� <br />_t <br />�� <br />7� <br />�� <br />±� <br />�, �� <br />�K <br />�'� <br />al] <br />�I <br />y •} <br />., � <br />�� <br />.;� <br />Chair Traynor asked if the Parks and Recreation Commission had any reaction (October <br />�'�]. Michael Noonan explained responses are best described in the Commission meeting <br />notes. Chair Traynor asked if there will be park dedication. The Parks and Recreation <br />Commission made no decision until more detail was available. General discussion <br />ensued. <br />Member Pust asked for details or support for the round-about as a"green layer". Adam <br />Arvidson explained round-abouts can signal as a transition to a new land use or parWopen <br />space. Member Pust asked for details of raised parkway trails and sidewallcs. Michael <br />Noonan explained the proposed pedestrian ways. <br />Member poherty asked how the pathways/sidewallcs will be different than from "walking <br />through a parking lot". Green islands could be raised or lowered areas in parking lots <br />with sidewallcs. Examples will be provided at the next meeting. <br />� S Chair Traynor asked what the "signature concept" of Twin Lakes would be — such as <br />���� Arbor Lakes and Heart of the City. What is the unique community benefit? Tim Whitten <br />ti� explained the unique opportunity to bring housing together, closely with retail and office <br />3!� — a sxnall town center adjacentto Langton Park. <br />;� <br />�d] Tim Whitten explained the housing will be denser, there will be milces of uses; residences <br />� I will be adjacent to shops and restaurants such as(Westridge Market in Minnetonka). <br />��. Small shops need bigger economic engines. <br />�3 <br />� Michael Noonan added that a new neighborhood can tie existing and proposed <br />�S development together. Heart of the City is a similar example. Arbor Lakes feature is its <br />�f� main street. Centennial Lakes has a green corridor with a storm water amenity among a <br />Page 8 of 12 <br />_� <br />� <br />� <br />