ASL CONSULTING ENGINEERS 1 - 2000

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• will result in minimal changes during the construction phase. Curb -to -curb cross sections at 50 feet on center will be provided that will show existing conditions and allow us to match existing pavement and other improvements. Horizontal and Vertical Alignment — Rideability of the street, especially the intersections, is of key interest to the City and the traveling public. The horizontal alignment for the streets and intersections is typically established and the rehabilitation will follow the present alignment. Rideability, as well as drainage, become issues as the street is rehabilitated or reconstructed and the existing cross slopes are modified due to overlays and grinding to match existing conditions. Intersections require additional attention since grinding, leveling and overlaying seem to exacerbate the current marginal cross slopes typically seen in urban intersections. We propose to prepare 1" = 20' scale (1:200 metric) intersection grid detail layout sheets for the major intersections to ensure rideability and drainage requirements are being met. Utilities — Utility work, related to any street rehabilitation /reconstruction, is critical to the overall success of the project. Overlay of existing streets requires that surface visible utility covers /manholes be adjusted to finished grade. Rehabilitation of urban streets, especially the intersections, requires that underground utilities be accurately identified and located to avoid potential impacts due to excavation and existing pavement removals during construction. This work is performed with the assistance of the utility owners. ASL will coordinate our utility work with the City and the various utility owners and be proactive at the beginning of the project in getting accurate utility data and in determining the necessary utility owner's review and processing requirements. Access to Adjacent Properties — Access to adjacent commercial businesses, passage of traffic through the project during construction and impacts to traffic flow patterns in the project area are key issues to be addressed during the construction staging and traffic control portion of the work. Normal traffic flow anticipated on the other major arterials and local streets in and around the project will be disrupted during construction due to the extent and duration of the work. Law enforcement and emergency services will require notification and alternate routes in order Is to met health and safety requirements. Bus routes will require coordination during the design to provide input for the construction staging plans and reduce service disruption during construction of the improvements. The adjacent commercial and retail businesses will require access during construction. In order to accommodate these needs during construction, we feel a construction staging plan will be necessary to provide direction to the contractor and assurance to the public that the City has recognized the potential impacts or the project and has taken steps to mitigate them through the use of well planned construction staging and traffic control. The potential exists for a project to impact a major arterial. There may be a need to implement a Traffic Management Plan for the overall project area and development of stage construction and traffic control plans that will significantly reduce complaints and improve traffic operations and safety throughout the project area during construction. Our in -house traffic engineering staff will work with the City to establish workable and realistic traffic control parameters for use by the construction contractor. We believe that the success of any project will depend upon adequately addressing these key elements during preparation of the preliminary and final plans, specifications and estimates (PS &E) package. Once the preliminary phase work tasks have been completed, reviewed and approved by the City and impacted agencies, ASL will incorporate comments and begin work on the final phase which includes the final PS &E. We anticipate making two plan check submittals (65% and 95% PS &E) and the final (100 %) PS &E package will be submitted after all reviews and approvals have been completed. ASL will prepare the roadway and traffic plan sheets to the City of Santa Ana standards. We are very familiar with the City's plan preparation format. Note: Our project approach is illustrated in the Design Process Flow Chart included at the end of this section. This flow chart describes graphically the Design, QC /QA, Submittal and Approval Process anticipated for completion of a typical roadway engineering services design project. l \prop99`p233ii.doc «- 2 ASL CONSULTING ENGINEERS