09 - Laserfiche WebLink

repaired with a conventional base repair construction method. This project also included the replacement of 340 feet of existing concrete curb and gutter, 2,200 square feet of existing sidewalk, and two ADA curb ramps. In addition, this project also overlaid the existing roadway surface with asphalt concrete within the project limits. In 2015, O'Grady Paving completed emergency repair work under the Annual Streets Resurfacing and Preventative Maintenance Project, CIP No. 14503, for $76,120 in areas adjacent to the 2013 repairs. The work included 21 locations along West Las Positas Boulevard between the DMV and Stoneridge Drive. Over 20,000 square feet of existing depressed pavement was milled and leveled with one-half-inch hot mix asphalt concrete; 1,200 square feet of distressed pavement was also repaired. The repairs near the DMV appear to be holding grade. In 2018, Ranger Pipelines completed leveling and roadway repairs at the Tassjara Creek crossing as part of the recycled water line lane restoration work. This included leveling work on the segments repaired in 2013 and 2015. In summer 2019, cracks and minor settlement began showing again within repaired areas, including areas filled with the lightweight cellular concrete. By spring 2020, significant settlement had occurred in the street. The City's Streets Maintenance Division then installed signage and began work on temporary leveling and roadway repairs. The capacity of the repairs became greater than what the Streets Division could efficiently handle. To address the urgent need of pavement restoration and provide a safe travel way to vehicular traffic, the Engineering Department scoped the project to be completed under an active paving contract. Proposals were requested from the three paving contractors that had active contracts with the City. Goodfellow Bros. LLC was the only contractor that had the capacity to complete the work. Given that the existing contract with Goodfellow Bros. LLC had federal funds, a National Environmental Policy Act review had to be completed prior to adding the work, which would have delayed the work into the rainy season. Staff recommended awarding a separate contract to ensure the work could be completed before wet weather arrived. On October 6, 2020, City Council awarded the contract to Goodfellow Bros. LLC to restore the pavement surface, providing a safe travel way for traffic in the amount of $232,072 and authorized the Director of Engineering to approve change orders up to the project contingency amount of $23,207. DISCUSSION This project temporarily repaired over 18,000 square feet of roadway in various locations on West Las Positas Boulevard between Hacienda Drive and Stoneridge Drive. The work included traffic control, base repairs, and milling and leveling of settled portions of the roadway. This remediating work was completed in late October 2020. These repairs are only temporary, and implementation of a long-term solution is necessary, since as described West Las Positas Boulevard has a history of localized settlement and differential movement. It is expected that the roadway will continue to experience differential settlement. Previous exploratory excavations have uncovered open cracks one-half-inch wide in the soil, extending over four feet below the roadway Page 3 of 4