Agenda - Council - 08/10/2020 - Laserfiche WebLink

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CC Regular Session 7, 3, Meeting Date: 08/10/2020 By: Bruce Westby, Engineering/Public Works Information Title Adopt Resolution #20-170 Accepting Quotes and Awarding Contract for Municipal Plaza Park Fill, Improvement Project #20-10 Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #20-170 accepting quotes and awarding a construction contract for Municipal Plaza Park Fill, Improvement Project #20-10. Background: The COR Infiltration Basin Improvements produced approximately 8,000 cubic yards of excess sand, which is stockpiled north of the infiltration basins. Plans to relocate this sand stockpile to the Municipal Plaza park property located north of Sunwood Drive and west of Center Street have been discussed with the Public Works Committee. The consensus of the Committee was to use this sand for filling Municipal Plaza park as soon as practical. Final plans for The COR Infiltration Basin Improvements determined that 35,000 cubic yards of excess sand would be generated from the project. Less than half the excess sand was to be used to fill in two low-lying City -owned properties in The COR including the property east of Zeolite Street between Veteran's Drive and Sunwood Drive, as well as the Municipal Plaza park property. The remaining sand was to be stockpiled on the City -owned property to the north where the current stockpile is located. Excess sand was never placed on the Municipal Plaza park property due to two issues that arose early in the project. First, an unmarked fiber optic line needed to be relocated, which delayed construction for a few weeks. Second, a deep topsoil vein was discovered which further delayed construction and reduced the volume of excavated sand. The delays in construction and reduction of excess sand resulted in a decision to haul and place any excess sand on the property east of Zeolite Street first. There simply was not enough time to establish new turf on the Municipal Plaza park property to ensure it could handle the heavy foot and vehicle traffic generated by the Happy Days festival, including all of the site preparation activities that occur a week or two before the festival itself. Upon completion of The COR Infiltration Basin Improvements, Staff surveyed the excess sand that was stockpiled on the City -owned property north of the basins and found the volume to be just under 8,000 cubic yards. Based on grading plans completed by Bolton and Menk, approximately 8,000 cubic yards will be needed to fill the Municipal Plaza park property. Below is a summary of the work required to relocate the sand stockpile from the City -owned property north of The COR infiltration basins (denoted as site A in the figure included in the attached Request for Quotes) to the Municipal Plaza park property (denoted as site B). First, the existing topsoil on site B will be stripped down to the underlying granular base material and the topsoil will be stockpiled on the City -owned property to the west (denoted as site C). The base material will then be tested and documented by Northern Technologies, Inc. to ensure no undocumented fill exists when the work is done. The stockpiled sand on site A will then be hauled to site B, where it will be dumped, leveled and compacted in one -foot thick layers. The stockpiled topsoil will then be spread evenly across the top of the compacted sand, then the site will be hydroseeded. Lastly, site A will be leveled out and seed and mulch will be applied over the existing topsoil.