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BACKGROUND <br /> On June 1, 2021, City Council awarded the contract to the lowest responsible bidder, A. <br /> Teichert & Son, Inc. in the amount of$3,457,440 and authorized the Director of <br /> Engineering to approve change orders up to the project contingency amount of <br /> $345,744. <br /> The streets repaired under this project were prioritized for treatment through the City's <br /> Pavement Management Program. There were two components to this project: the first <br /> component was the roadway repaving; the second component was pavement <br /> preparation work on streets that received slurry sealing treatment under a separate <br /> project. <br /> DISCUSSION <br /> The first component of the project consisted of repaving 1.33 million square feet of <br /> pavement with a new layer of asphalt concrete (overlay), as well as some isolated full- <br /> depth pavement repairs prior to the overlay, adjusting utility covers to grade, installing <br /> traffic signal vehicle detection loops, and traffic striping. Five different construction <br /> methods were utilized in this project. Dependent on the pavement condition of each <br /> street, the appropriate construction method (treatment) was applied to each street. The <br /> treatment methods were as described below. <br /> 1. Overlay (OL): This reconstruction method involved milling the edges of the <br /> existing pavement and placing a new surface course of 1.5 to 1.75 inches of new <br /> asphalt concrete over the top of the existing pavement. Milling the edges is <br /> necessary to conform the new overlay with the existing curb and gutter. <br /> 2. Overlay with Fabric (OUF): This reconstruction method involved milling the <br /> edges of the existing pavement and placing a layer of paving fabric on the <br /> surface of the existing pavement prior to applying a new surface course of 1.75 <br /> inches of new asphalt concrete over the top of the fabric. Paving fabric is needed <br /> when the existing pavement has cracking caused by swelling and shrinking <br /> associated with heat and cool cycles. The paving fabric "bridges" these cracks <br /> that are only in the surface layer. Without the fabric, the cracks would quickly <br /> propagate to the surface of the new pavement. This is known as "reflective" <br /> cracking. <br /> 3. Pavement Milling and Overlay (Mill/OL): This reconstruction method involved the <br /> removal of the existing asphalt concrete surface layer of the entire street surface <br /> by milling, then applying 1.75 inches of asphalt concrete over the entire street <br /> surface. The milling of the entire street surface is necessary on streets upon <br /> which performing an OL would raise the crown and increase the cross slopes, <br /> particularly along the parking lane, to an unsatisfactory level. <br /> 4. Pavement Milling and Filling (Mill/Fill): This reconstruction method involved the <br /> removal of the existing asphalt concrete layer and base material by milling, then <br /> applying 3 inches of asphalt concrete. This method of repair is used on streets <br /> Page 2 of 7 <br />