Agenda - Public Works Committee - 07/16/2013

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Public Works Committee 5. 4. Meeting Date: 07/16/2013 Submitted For: Grant Riemer By: Grant Riemer, Engineering/Public Works Title: Cost Estimate for Pedestrian Crosswalk at Alpine Dr and Zirconium St Background: At the July 21, 2009 Public Works Committee received a request for providing cross walks that would offer access to Alpine Park to the residential neighborhoods to the north. This proposal was revisited at the 9/18/2012 Public Works Committee and once more at the April 16,2013 Public works Committee meeting. The chief concern is the ability to access the park safely across Alpine Drive which has a 45 mile per hour speed limit and a daily traffic count of 2400 vehicles per day. The Alpine Acres subdivision neighborhood includes 22 single family units fronting on 153rd Way that accesses Alpine Drive via Zirconium Street, and 16 single family units fronting on 153rd Court which accesses the west end of the park. A crosswalk providing access to the western portion of the neighborhood was installed at the intersection of Alpine Drive and 153 Court at a relatively modest cost of $2,200. However, a crossing location for the eastern neighborhood was found to be more problematic and no action was taken by the Committee. A possible location having an adequate, but not ideal sight distance had been identified at a point approximately 200 feet west of the intersection with Zirconium Street. This location has the advantage of requiring a minimal distance of "extra travel" for pedestrians from the eastern neighborhood that wish to go to the playground area which is east of Zirconium Street. A crossing at this location would require; a) 200 feet of trail, b) cross walks with signage, c) concrete steps down the grade, and pedestrian ramps. The estimated cost for these improvements is $38,000. There is also a question of compliance with the Americans with Disability Act (ADA) since steps would not make this access usable to wheelchair users. Staff contacted the Department of Justice, which administers the act, and was advised that a facility (the park) required only one accessible point. However, if an access were to be considered the main entrance, then a handicap access should be seriously considered. This would not be the case since there are two other access points on both the east and west sides of the park. Notification: Observations/Alternatives: At The April 16, 2013 meeting the PW committee suggested staff look at constructing the trail to the west instead towards the main entrance to the east. Staff has staked a trail on the south side of Alpine leading into the park; terminating near the picnic pavilion and dog park. A crosswalk would still be installed at the point 200' west of Zirconium St and connected by a 10' crushed aggregate trail. Once pedestrians crossed the road to the south side of Alpine Dr they would take an 8' crushed aggregate trail south west down the slope into the park. The reasoning behind the crushed aggregate trail is twofold. First this will be a limited use trail, which in reality is only serving the one neighborhood to the north - Alpine Estates. Second is cost. Public works has a stock pile of reclaimed asphalt at the shop that would be suitable for this project, so there would be no additional cost for the material. The crosswalk proposed by staff would be a standard fluorescent yellow/ green design, with advance warning signs included. Cost for the basic crosswalk and trail are as follows: Standard crosswalk signage w/striping- $1,500.00 4 ADA approved pedestrian ramps /curb cuts at approximately $1200.00 or $4,800.00 total (estimated) 50 tons of recycled material (con -bit) —no cost Labor/equipment to install trail component-$3,000.00 Total estimated cost of project-$9,300.00 Funding Source: