7.4. SR 08-15-2016 - Laserfiche WebLink

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and a crossing of Trout Brook to Twin Lakes Estates. The traffic study included in the EAW analyzed the traffic using these multiple connections. Two-lane roads,like 191st Ave, are designed to comfortably support 1,000 vehicle trips per day, a level of service D/E,based on general livability guidelines. In evaluating vehicle trips based on the existing uses and approved lots, the subdivision generates about 1,182 trips per day. The addition of the 41 homes in the current application,River Park 4th Addition,increases the estimated trips per day to 1,592, nearly 60 percent above the livability guideline. Under the current proposal, all of the estimated vehicle trips will continue to be forced to use the single access point at 191st Ave. Staff does not support approval of the plat without providing an additional access into and out of the subdivision in accordance with the traffic study completed in the EAW. Staff strongly recommends that the connection to the southwest onto Twin Lakes Parkway be constructed as part of the proposed River Park 4th Addition. The current proposal for River Park 4th Addition includes land that abuts Twin Lakes Estates, and a connection to Twin Lakes Parkway will provide the second access point that is needed to support the increasing number of homes in River Park/Miske Meadows. A connection to Twin Lakes Parkway addresses a number of traffic concerns that present themselves with this proposed development. It provides the second of four access points to support the additional trip generation and it eliminates the long dead end cul-de-sac as proposed. The proposed termination of Ivanhoe would be approximately three-quarters of a mile from the nearest access. Ordinance limits cul-de-sacs to 700 feet. Beyond the above described traffic needs, the connection improves connectivity of the local street and sidewalk system for that area of the city. Existing and future residents will have alternatives that do not place them on Cleveland Ave where we have heard about safety concerns on a number of occasions. Students and families of Twin Lakes Elementary School will be able to come from the south,rather than stacking into the turn lane on Cleveland Ave. Students within the Twin Lakes Estates and Trott Brook neighborhoods go to the school, and the connection would allow them to walk, bike, or drive to school without the need to use a county road (Twin Lakes Road or Cleveland Street). A letter from the principal of Twin Lakes Elementary School supporting staff's recommendation to connect the developments is attached. Grading/ Drainage The Engineering and Stormwater Departments continue to review the plans and are working with the applicant to ensure the proposal meets current city standards. One stormwater pond has been removed to reduce impacts from required buffer setbacks, and new ponds are either being expanded or created to treat the water. Wetlands There is a large wetland west of the parcels on the southern half of the plat. An easement over the parcels preserving the 45 foot wetland buffer must be added to preserve compliance with city code. The 25-foot wetland buffer is required to be signed at every property line in accordance with city codes. Landscaping The landscaping for the development will be consistent with previous plans, and includes two trees per lot,with additional trees identified on corner parcels. N:ADeportments\Community Development\Planning\Case Files\P\P 16-11 River Pork Fourth\new council\7.4 sr Staff Report RP4.docx