Agenda - Council - 11/14/2017 - Laserfiche WebLink

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lour 1111.1siion: To work together to reiposihty grow our community, and to provide quality, coat -effective, and efficient government ierrlcas. CC Regular Session 6. 2. Meeting Date: 11/14/2017 By: Bruce Westby, Engineering/Public Works Information Title: PUBLIC HEARING: Adopt Resolution #17-11-285 Approving Feasibility Report and Ordering Plans and Specifications for Improvement Project #18-00, Stanhope Terrace Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #17-11-285 approving Feasibility Report and ordering Plans and Specifications for Improvement Project #18-00, Stanhope Terrace Street Reconstructions. Background: City Improvement Project 18-00 proposes to reconstruct three street segments within the Stanhope Terrace residential neighborhood including; • Ute Street north of Alpine Drive through the north cul-de-sac, • 154th Lane between Ute Street and Roanoke Street, and • 153rd Court west of Roanoke Street through the west cul-de-sac. These streets total approximately 2,800 linear feet. A map showing the location and scope of the proposed improvements is included in Figure 1 in Appendix A of the Feasibility Report, which is included as an attachment to this case. These street segments were constructed in 1991. Per field observations, record plan documents, and results from Braun Intertec's geotechnical report and ground penetrating radar (GPR) analysis, the bituminous pavement section ranges from 1.6 to 6.1 inches thick with an average of 2.9 inches, the aggregate base ranges from 2.1 to 10.6 inches thick with an average of 4.9 inches, and the pavement section was built on sandy subgrade materials generally considered suitable for pavement support. The streets were constructed with bituminous curb to a width of 29-feet from face -of -curb to face -of -curb, and are generally centered within 66-foot wide right-of-ways. The storm sewer system consists of concrete catch basins and pipe that drain runoff from the street to adjacent low-lying areas. Two catch basins are located along 154th Lane and drain runoff from the street to a low-lying area with a drainage and utility easement located on the northern 75 feet of 4851 154th Lane. Three catch basins are located near the intersection of Ute Street and 154th Lane. Storm runoff not collected by these catch basins drains to Alpine Drive and Roanoke Street and collects in those storm sewer systems. City staff evaluates and rates the condition of pavement sections on all City streets on an annual basis using the Pavement Surface Evaluation and Rating (PASER) system. In the summer of 2017, the pavement section of the above -referenced street segments were rated with a PASER rating of 3, which indicates these streets require complete reconstruction. City staff patch these streets annually, particularly before winter so the streets can be plowed without further damaging the pavement. Pictures of the street are located inAppendix A of the Feasibility