Agenda - Public Works Committee - 06/21/2022

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Public Works Committee 5.2. Meeting Date: 06/21/2022 Submitted For: Joe Feriancek, Engineering/Public Works By: Joe Feriancek, Engineering/Public Works Title: Review bicycle and pedestrian facilities as part of the 161st Avenue Street Reconstruction Purpose/Background: Purpose: The purpose of this case is to discuss potential alternatives for creating bicycle and pedestrian facilities as part of the 16Ist Avenue Reconstruction, Improvement Project #23-01. Background: City Improvement Project 23-01 proposes to reconstruct 161st Avenue between Armstrong Boulevard and Variolite Street. The street totals approximately 2,700 lineal feet (0.51 miles) in length, 29 feet wide as measured to the face of curb, with bituminous curb. No parking is allowed on either side of the street. The existing right-of-way is 66-feet wide throughout. Project History • 2022 — 2031 Capital Improvement Program — listed as street reconstruction for 2024 . April 12, 2022 City Council accepted proposals for topographic survey Pavement History 161 st Avenue was constructed in 1979. Pavement maintenance records indicate the street received crack seal / seal coat improvements in 1993 and 2009, and a pavement overlay in 2001. City maintenance crews have performed patching over the last several years, and the bituminous curb is quite deteriorated. Ground Penetrating Radar (GPR) was performed on the street segment, finding an average bituminous thickness of 3.4 inches and aggregate base thickness of 3.2 inches. Planned Street Improvements 161 St Avenue is a Municipal State Aid (MSA) street, and must comply with State Aid design requirements, including conforming to a 10-ton design. Staff needs to obtain geotechnical evaluations prior to determining the required pavement thickness, though does know the existing pavement section is not sufficient to meet a 10-ton design. The right-of-way adjacent to Central Park is proposed to remain as is at 66-feet wide, but along the PACT Charter School / Saint Katherine Drexel Church property the right-of-way is proposed to increase to 80-feet wide. Bicycle and Pedestrian Facilities Staff has reviewed several potential options for including bicycle and pedestrian facilities as part of the 161 st Avenue reconstruction. The various options can have a large impact to the project scope, estimated costs, and trees within the project corridor. For all the options listed, Staff proposes to keep 161st Avenue as no parking in both directions, use concrete curb and gutter, add storm sewer and/or ditch flumes, maintain the 30-mph posted speed limit, assume future ADT to be between 2,000 and 5,000, and follow State Aid requirements for lane width(s) and curb reaction(s). Additionally, any trail connections would tie into the existing trail off the park drive, avoiding the 161 St boulevard area in -front of the parking lot. For tree removal and impact requirements, Staff assumed any tree within 2 feet of a proposed improvement would require removal, and any tree within 6 feet of an improvement would have a significant impact to the root system. Trees with significant impacts to the root system are often compromised and die over a period of years.