Common use of Technical Understanding Clause in Contracts

Technical Understanding. The City of Yorba is proposing an Annual Pavement Preservation project on various roads and sidewalks in Zone 5 and 6B in the City of Yorba Linda, California. The City owns and maintains approximately 215.5 centerline miles of pavement, representing a total replacement cost of approximately $500 million. This includes 14 miles of the principle arterials, 38.7 miles of arterial streets, 11.9 miles of collector streets, and 150.9 miles of local streets. The project aims to protect the vital roadway infrastructure servicing these primarily residential areas and provide ADA compliant curb ramps at over 200 locations in the City. Striping plans will be implemented on main the throughfares of ▇▇▇▇▇ ▇▇▇▇▇ Road and ▇▇▇▇▇▇▇▇▇ Road. The project covers the majority of Yorba Linda’s Zone 5, generally located to the Northeast of ▇▇▇▇▇ ▇▇▇▇▇ Blvd. as well as Zone 6 just to the Southwest of Zone 5. I also includes sections of Black Gold Drive and Lakeview Avenue (located to the western side of the City). SR-90 (Imperial Highway) and SR-91 will not be modified in this project, therefore coordination with Caltrans is not anticipated. There are very few schools and retail shopping centers anticipated to be impacted by construction. ▇▇▇▇▇▇ Ranch Middle School and Eastlake Village Center are within the project area and traffic in these areas will be given special consideration. The work on this project consists of cold milling, micro milling, asphalt concrete overlay, asphalt concrete digouts, slurry seals, construction of over 200 curb ramps (Caltrans standard plan A88A / A88B), construction of curb and gutter, manholes / valve covers adjust to grade, installation of 30 loop detectors, pavement striping / markings. The Contractor will support these activities through equipment mobilization, traffic control, stormwater pollution control and general site safety planning. It is critical the contractor ensures the Safety of the public and the environment while performing these activities. The project is estimated for 150 working days. Working hours will be limited to 7:30 am to 4:00 pm Monday-Friday with lane closures from 9:00 am to 3:00 pm. To provide uninterrupted traffic flow, a multi phased traffic control plan has been provided. All traffic lanes shall give the appropriate safe clearance from construction equipment and open excavation. All traffic control devices should be maintained in proper working condition 24 hours a day, 7 days a week for the duration of the work. During the construction, flaggers will be utilized to ensure the safe flow of traffic at intersections and businesses that may be affected. ▇▇. ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, Assistant Engineer, City of ▇▇▇▇▇ ▇▇▇▇▇ Public Works Department FY 22-23 Annual Pavement Preservation Project (Zone 5 & 6B) ▇▇▇▇▇▇▇▇▇▇▇▇ has identified the following issues that may be encountered during the project: Element Concerns Remedy Safety • Public and Worker Safety • Public School Proximity • Ensure Contractor has a safety plan in place to always provide safe street and sidewalk access. • Notifications to increase awareness of hazards are always in place. Environmental • Water Quality • Biological and Cultural Resources • Hazardous Materials • Noise and Odors • Air Quality • Review and implement the Environmental Commitment Record (ECR). • Incorporate all applicable construction site BMPs and weekly / annual SWPPP documentation. • Proper communications with the public of potential noisy or odorous activities. • Dust control measures when necessary. ADA Compliance and Pedestrian traffic • Construction Access for the Disabled • Pedestrian Traffic Near Public Schools • ADA Compliance of Final Construction (Curb Ramps) • Temporary pedestrian access during construction. • Evaluations of ADA plans compared to existing structures. • Verify all ADA requirements: including sidewalk, curb ramps, gutter slope and counter slope, detectable warning surface, push buttons, and road surface slope and condition. Construction Activities • Truck and Heavy Equipment Traffic • Ensuring Activities are Completed in Working Windows • Regular review of contractor schedule. • Ensure Contractor contingency plan is in place. Work Zones • Staging Area • Equipment Access • Areas properly identified and secured. • Identification of areas unauthorized area for pedestrians. Utilities Coordination • ATT and Other Communications • Southern California Gas • ▇▇▇▇▇ ▇▇▇▇▇ Water District • Southern California Edison • Ensure Contractor performs advanced notifications to appropriate Utilities staff. • Ensure emergency contacts & calling trees are established prior to construction. Roadway striping and makings • Accurate Implementation of the Striping Plan • Proper Adhesion of Striping and Markings • Ensure proper layout through exhaustive cat tracking prior to striping activities. • “Measure twice” • Ensure surfaces are prepped appropriately and adhesives are appropriate temperature / viscosity. Vehicle Traffic • Driveway Access (Business & Residential) • Minimize Traffic Congestion • Traffic Control review and proper implementation. • Notifications to increase construction awareness of hazards. • Always maintain vehicle safe travel lane(s). Paving operations • Application of Tack Coat for Proper Adhesion • Application of tack coat spread rate per spec. • Ensure appropriate ambient temperatures and weather for asphalt paving. • Asphalt is applied at appropriate lift per specs (thickness). • 95% compaction is achieved per specs and asphalt rolling is completed within temperature constraints per specifications. • Request all required materials testing (gradation, compaction, cores, etc.). ▇▇. ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, Assistant Engineer, City of ▇▇▇▇▇ ▇▇▇▇▇ Public Works Department FY 22-23 Annual Pavement Preservation Project (Zone 5 & 6B) ▇▇▇▇▇▇▇▇▇▇▇▇’s assigned inspector for this project reviewed the assignment from the City’s perspective regarding the lead roadway site