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KEY ISSUES AND SPECIAL CONCERNS <br />Based on our experience with projects similar to <br />those anticipated for this contract, key issues <br />and concerns will include constructability, utility <br />research and accurate base map preparation. <br />Constructability and Construction Budget <br />The alternatives and opportunities will need to be <br />thorough and effective. Understanding of the key <br />constraints will be necessary for your projects to <br />be effective and provide the City with the most <br />cost efficient project and reduce impacts to the <br />community. Key alignment constraints and <br />considerations that will be investigated will <br />include the following: <br />• Proposed connections to the <br />existing manholes <br />• Opportunities for trenchless <br />construction methods <br />• Impacts to traffic, neighborhoods <br />and driveways <br />• CDPH separation criteria with sewer facilities <br />• Potential utility conflicts and depths <br />of crossings <br />• Adjacent pipeline trench impacts <br />• Construction schedule constraints <br />and durations <br />• Impacts to community, businesses and other <br />activities in the project area <br />• Construction cost estimates <br />Utility Research <br />One of most critical issues for constructing <br />pipeline facilities within existing streets is <br />properly identifying the existing utilities and <br />determining any potential conflicts with utility <br />crossings. This issue is addressed by our <br />approach to detail and thoroughness. We will <br />perform a thorough record search utilizing the <br />USA Dig Alert database and available record <br />drawings. Using the USA Dig Alert database and <br />our contacts with the various agencies, we will <br />request all available as -built data, and request <br />information on existing facilities and any future <br />planned projects in the area that may potentially <br />impact the proposed construction schedule. <br />Once the utility information is obtained, it will <br />then be carefully calculated in the base AutoCAD <br />drawing. As we have done on all of our past <br />pipeline projects, our design engineer will field <br />walk the site, noting all above ground features, <br />such as valve cans, manhole covers, <br />appurtenances, and any repaired pavement <br />trench limits. They will also measure any USA <br />markings requested ahead of time at the <br />potholing stage. He will verify the field <br />measurements and adjust the locations <br />accordingly in the drawings to show the exact <br />locations based on the information to date. <br />Based on this task's importance and during the <br />pipeline alignment analysis, our team will back <br />check the utility data and record drawing <br />information with the AutoCAD drawing files and <br />construction plans. This back check procedure is <br />intended to verify that the information from the <br />record drawings and utility data is correctly <br />translated onto the construction plans. <br />Our approach to this stage of the project is <br />critical. We have a firm understanding of how <br />important a proper and thorough search is, and <br />what the impact that any missing or wrong <br />information will have on a project's success and <br />potential for contractor change orders. Therefore, <br />we will also keep an active tracking log of all our <br />requests and data received, when and what was <br />received. We will catalog the data received <br />according to utility location and type/size. <br />Traffic Control <br />Maintaining bus routes, residential, commercial, <br />and emergency vehicle access to the homes and <br />businesses that are located along the project <br />installation route is critical to the success of the <br />project. We will use our experience designing <br />and assisting in the implementation of pipelines, <br />both force mains and gravity flow facilities, within <br />residential communities. <br />First, we will consider traffic control techniques to <br />reduce traffic volumes within the project area and <br />lessen the effects of construction traffic. Specific <br />residential access provisions will be explicitly <br />stated on the plans and included in the project <br />specifications. We will also develop a phasing <br />plan to restrict the contractor's work to a given <br />location until the improvements at that location <br />are complete. Lastly, requirements for residential <br />notifications will also be included in the <br />specifications so that residents will know in <br />advance when work on the proposed storm drain <br />4 stantee City of Santa Ana ;�raoosal foi Or _,all Water Resources Ergineerirg Services RFP No. 19-1 J� 1 14 <br />