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POLK STREET OUTFALL WATER OUALffY IMPROVEMENTS, PROJECT113984 -SCOPE AMENDMENT <br /> 1 <br /> special provision sections will be identified and preliminary edits made, for this submittal. <br /> Conduct review meeting with the City to discuss 90 percent document. Review comments <br /> will be addressed and incorporated into the 100% design if appropriate. Concurrence by the <br /> City on the major design elements, such as design approach, alignments, etc., must be <br /> received before the next phase of design begins. Design concepts will be frozen at that time <br /> to proceed with final design. Plans and or specifications will include an option to phase the <br /> construction so that the sanitary connections and the final access road construction could be <br /> carried over to the following year if necessary. <br /> Deliverables <br /> 90% SubmittaL• <br /> Plans -11x17 pdf file uploaded to CH2M HILL ftp site. <br /> Preliminary Design Report -pdf file uploaded to CH2M HILL ftp site. <br /> Draft Special Provisions -pdf file uploaded to CH2M HILL ftp site. <br /> Preliminary Engineer's Construction Cost Estimate -pdf file uploaded to CH2M HILL ftp <br /> site. <br /> Task 7.4 Geotechnical Engineering <br /> Design and construction of this facility requires geotechnical investigation and evaluation. <br /> This is primarily due to the deep nature of the excavation. Stability and dewatering <br /> requirements of the excavation can have significant impacts to project. It is our <br /> understanding that a geotechnical exploration was conducted in the vicinity of the site by <br /> Geoscience, Inc. of Eugene Oregon in order to obtain information on subsurface condition, <br /> perform laboratory soil tests on collected soil samples and prepare the geotechnical data <br /> <br /> . report. CH2M HILL will utilize the information from the Geoscience Inc. data report and <br /> perform geotechnical analyses as follows: <br /> 7.4.1 Existing Data Review <br /> Existing subsurface information available within the vicinity of the project, especially <br /> information from published geologic mapping, will be obtained and reviewed. <br /> 7.4.2 Geotechnical Analyses <br /> Geotechnical analyses will be limited to the analyses required to develop geotechnical <br /> recommendations for the vault improvement portion of this work. The following <br /> geotechnical tasks and analyses will be performed: <br /> • Review generalized soil profile developed by others <br /> • Evaluate bearing capacity and provide recommendations for allowable bearing pressure <br /> • Evaluate lateral earth pressures and provide recommendations for at-rest, active, and <br /> passive lateral earth pressures. <br /> • .Provide base friction factors <br /> • Evaluate and provide recommendations for groundwater control <br /> PDX/POLK ST BASIN PLANNING AND ENGINEERING SCOPE AMENDMENT DRAFT VERB.DOC 3 <br /> <br />