Agenda - Parks and Recreation Commission - 07/12/2001

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Preliminary Plat Review: Centex Addition July 5, 2001 Page 2 of 5 DensiW: The subject property is 74.37 acres and the net density is 2.08 units per acre. Streets: The proposed plat provides two accesses to the south (Xkimo Street and Waco Street) onto Alpine Drive (aka 157 Avenue); Yakima Street will be extended north to provide a through street to 156th Lane. These three accesses are anticipated to handle most of the trips generated by the new proposed subdivision since Alpine Dr/ve and 156th Lane are collector streets. The plat proposes three additional connections with existing adjacent streets at 155th Lane, Waco Street, and Ute Street. These streets will provide connections to adjacent neighborhoods for local trips and flexibility for emergency situations. City Code restricts cul-de-sacs to 600 feet in length. All of the cul-de-sacs, w/th the exception of the Yakirna Street cul-de-sac (655 feet), meet this standard. A modification or variance to cul-de-sac length will be required. Utility Plan: The plat will be served by municipal water and sanitary sewer. A utility plan has been submitted and is generally acceptable. Water must be looped on Alpine Drive (153rd Lane N.W.) and connected to the west and east. A lift station is being proposed to service a portion of the subdivision. This review is not an approval of the elevation proposed on the plan. A review is underway to determine whether the sewer should be constructed deeper in order to service a larger area. Grading and Drainage: The subdivision proposes to drain to the center of the plat and provide 'an overflow to the Rum River to the east through Bear Park, south of Salish Street. The 1997 Storm Water Management Study proposes the outlet to be run on 156t~ Lane N.W. The intent being to pick up the low areas in the parks west of Yakima Street and south of 156m Lane N.W. An alignment to the Rum River for the overflow should consider these goals. Also, as part of the Stormwater Management Plan, there is a provision to provide an overflow storm sewer along Alpine Drive (157 Avenue N.W.) to drain lowland east of Ute Street and south of Alpine Drive (153~d). This overflow should be completed with this subdivision as ,!. portion of the pipework would be in the plat. A Lower Rum River Water Management Organization (LRRWMO) permit will be required for this plat. 'The presence and protection of wetlands must be identified as part of the LRRWMO permit-ting process. The proposed building elevations must be shown on the grading plan and must be a minimum of two (2) feet above the 100 year flood elevation.