Agenda - Council - 09/11/2018 - Laserfiche WebLink

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CC Regular Session 4. 9. Meeting Date: 09/11/2018 By: Bruce Westby, Engineering/Public Works Information Title Adopt Resolution #18-187 Ordering Assessment Roll and Calling Assessment Hearing for Improvement Project # 18-00, Stanhope Terrace Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #18-187 ordering preparation of an assessment roll and calling for an Assessment Hearing at 7 p.m. on October 9, 2018 for Improvement Project #18-00, Stanhope Terrace Street Reconstructions. Background: City Improvement Project 18-00 involved reconstructing Ute Street, 154th Avenue, and 153rd Court within the Stanhope Terrace residential neighborhood. These street segments total approximately 2,800 linear feet, or 0.53 miles. A map showing the scope of the improvements is included asFigure 1 in Appendix A of the attached Feasibility Report. Pre -Existing Conditions These street segments in the Stanhope Terrace neighborhood were constructed in 1991. The bituminous pavement section ranged from 1.6 to 6.1 inches thick, with an average of 2.9 inches. The aggregate base section ranged from 2.1 to 10.6 inches thick, with an average of 4.9 inches. The road section was built on sandy subgrade material generally considered suitable for pavement support. The streets were constructed with bituminous curb at 29-foot wide from face -of -curb to face -of -curb. The streets are generally centered within a 66 foot wide right -of- way. Ute Street and 154th Lane was cracksealed and sealcoated in 1996, and 153rd Court was cracksealed and sealcoated in 1998. The street segments have regularly received spot patching on an as -needed basis. In the fall of 2017, the pavement sections of the above -referenced street segments had PASER ratings of 3, meaning they were past the point of overlaying and instead required complete reconstruction. The existing storm sewer system consists of catch basins along 154th Lane which drain runoff from the street to a low-lying area with storm sewer and utility easements located on the northern 75 feet of 4851 154th Lane. Stormwater runoff not collected by the catch basins is carried to Roanoke Street and collected within its storm sewer system. Municipal sanitary sewer and water utilities do not exist under any of these streets. Completed Improvements All streets were reconstructed matching their existing widths and locations. The existing bituminous curb and gutter was replaced with concrete curb and gutter. The existing bituminous pavement sections were reconstructed using the Full Depth Reclamation (FDR) process. This involved grinding the existing bituminous pavement with an inch or more of existing aggregate base (pavement reclamation), then placing and compacting some of the reclaimed material on top of the reshaped and compacted existing aggregate base. Then, 2-inches of bituminous base course and 1'/2-inches of bituminous wear course was placed and compacted on top of the compacted reclaim material to provide a pavement section with a 7-ton structural capacity and a 60-year