CITY COUNCIL REGULAR MEETING AGENDA PACKET

Page 2 of 6 The project's first component consisted of repaving 1.86 million square feet of pavement on the streets listed in Table 1 below, including repairing 135,000 square feet of isolated distressed pavement on various streets prior to roadway repaving. Five different reconstruction methods were used in this project, depending on the pavement condition of each street. The reconstruction methods used are described below. 1. Overlay (OL): This reconstruction method involves milling the edges of the existing pavement and placing a new surface course of 1.5-1.75 inches of new asphalt concrete over the top of the existing pavement. 2. Overlay with Fabric (OL/F): This reconstruction method involves milling the edges of the existing pavement and placing a layer of paving fabric on the surface of the existing pavement prior to applying a new surface course of 1.75 inches of new asphalt concrete/HMA (Hot Mix Asphalt) over the top of the fabric. Paving fabric is needed when the existing pavement has cracking caused by swelling and shrinking associated with heat and cool cycles. The paving fabric “bridges” these cracks that are only in the surface layer. Without the fabric, the cracks would quickly propagate to the surface of the new pavement. This is known as “reflective” cracking. 3. Pavement Milling and Overlay (Mill/OL): This reconstruction method involves the removal of the existing asphalt concrete surface layer of the entire street surface by milling, then applying 1.75 inches of asphalt concrete over the entire street surface. 4. Pavement Milling and HMA Filling (Mill/Fill): This construction method involves the removal of existing pavement sections to the depth of 3 – 4 inches and replacement with a new layer of asphalt concrete over the entire street. This method is basically the same as the Mill/OL method above, but at a greater depth. The Mill/Fill operation requires the work to be completed on the same day to provide safety and to protect the subgrade while the Mill/OL allows the asphalt concrete overlay to be completed at a later date. 5. Cold In-Place Recycled and Overlay (CIR/OL): The CIR process includes pulverizing (milling) the top 4 inches of the existing pavement, mixing the pavement with asphalt binder/cement agents, grading and compacting by paving machine, and applying a fog seal. After completion of the CIR process, 1.75 inches of HMA layer is applied on top of the newly recycled pavement surface. This treatment is normally utilized on streets that are in poor condition and require total reconstruction, including a complete removal and replacement of the asphalt concrete layer, along with stabilization of the existing base material. Total reconstruction is a very costly and lengthy process, which creates a major impact on traffic and residents. The City has successfully completed the CIR process on three other projects in the past. (Hopyard Road, from Valley to Gibraltar Road, and Dorman Road) Page 109 of 264