Agenda - Council - 04/28/2015 - Laserfiche WebLink

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The plans propose to reconstruct both streets to match the existing width of 31 -feet from back -of -curb to back -of -curb. Concrete surmountable curb and gutter is proposed for both streets to better facilitate drainage and to protect the edges of the pavement (B618 curb and gutter was originally proposed but the adjacent streets have surmountable curb and gutter the plans were revised to include surmountable curb and gutter to match the adjacent streets). The plans also propose storm sewer improvements to better facilitate drainage. It should be noted that the streets will be reconstructed using aggregate base from the City's stockpile that was purchased with the future public works site which will save costs. The plans also propose to construct 6 -foot wide concrete sidewalks within City right-of-ways along the east side of Garnet Street and the north side of 168th Avenue. This sidewalk will connect the existing 6 -foot concrete sidewalk segment east of Garnet Street that dead -ends south of 169th Lane NW to the existing sidewalk north of 167th Avenue, which also connects to the regional bituminous trail along TH 47. This sidewalk will also connect to future sidewalk proposed to be constructed north of 168th Avenue with the next addition of the Brookfield development. The proposed sidewalk will therefore serve to close a significant gap in the existing pedestrian facilities in this developing area of the City. The plans also propose to construct storm sewer improvements with both streets, and perpetuating the existing culvert crossing under Garnet Street north of 168th Avenue. This work will include re -grading portions of the existing ditch sections east and west of Garnet Street, including blending into the stormwater ponding area east of Garnet Street. Staff is still in the process of addressing the proposed stormwater design requirements with the Lower Rum River Watershed Management Organization but will be prepared to present the LRRWMO's final determination when bids are presented to the City Council on June 9th for consideration of awarding a construction contract. However, at this time staff does not anticipate any cost increase as related to stormwater improvements that may be required by the WMO. The plans also propose to construct public utilities under both Garnet Street and 168th Avenue since several adjacent property owners expressed an interest in connecting to City utilities at some point in time, and because the properties were developed over 20 years ago their septic systems and wells may soon begin to fail. Proposed utility improvements include: • Extending 8 -inch ductile iron pipe (DIP) watermain under both streets — This provides a benefit by connecting the existing water supply stubs on each end of Garnet Street, and by allowing for a future connection into the Brookfield development along 16$h Avenue, thereby looping the water supply systems in this developing area of the City. • Extending 8 -inch polyvinyl chloride (PVC) sanitary sewer under both streets — This is proposed since watermain is proposed to be constructed at this time, thereby preventing future impacts to both streets. • Installing 1 set of service stubs to each property — This includes a 1" copper water line and a 4" PVC sewer service line to each property. Too many unknowns exist regarding future lot splits to install more than one set of services. The plans also include two alternate bid items as follows: • Alternate Bid #1: Remove temporary cul-de-sac and construct permanent cul-de-sac @ south end of Feldspar Street — This work addresses previous Council direction to convert the temporary cul-de-sac to a permanent cul-de-sac. • Alternate Bid #2: Construct temporary cul-de-sac @ west end of 168th Avenue — This work will be required if the reconstruction of 168th Avenue occurs before 168th Avenue is constructed with the Brookfield 6th Addition development. Notification: Notifications were not required for this case. Observations/Alternatives: