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2513-3 <br /> Task 1 —Review Existing Information. Review previous studies of the subsurface conditions and <br /> conceptual designs near the Interstate 5 (I-5) and to the east, designated as Reaches 1, 2, and 3 from <br /> Station DD5-A-325+00 to DD5-A-343+00. Comforth will review the design and as-built documents <br /> of the previous repairs performed by the USACE as provided by Otak and Diking District 5. Assumes <br /> 8 hours for this task. Task Total= $1,650. <br /> Task 2 — Final Design of Dike under Interstate 5 (STA DD5-A-340+46 to DD5-A-343+00). <br /> Cornforth Consultants (CCI) propose to perform final geotechnical design of the dike repairs and <br /> provide input to develop construction plans and technical specifications for geotechnical aspects of the <br /> work. Tasks included in the proposed scope of work are described in more detail below. Cornforth <br /> would provide input for the final geotechnical design of the dike repairs for Station DD5-A-340+46 to <br /> DD5-A-343+00 (Reach 3). Final design for under I-5 (Reach 3) would consist of extending the dike <br /> on the landside as previously described in Otak's previous memo. This design option involves moving <br /> the dike footprint to the landside to develop an adequate seepage barrier. This task includes <br /> development of a geologic and analysis section through the dike to evaluate the stability. The analytical <br /> section would be used to evaluate the preferred repair option and develop final dike geometry. Final <br /> design will include input on drawings for 90% and 100% design submittals for review and comment <br /> by DD5. Task Total=$8,800. <br /> Task 3 — Final Design of Dike STA DD5-A-325+00 to DD5-A-340+46. Cornforth would provide <br /> input for the final geotechnical design of the dike repairs for Station DD5-A-325+00 to DD5-A-340+46 <br /> (Reaches 1 and 2). Final design would include input on drawings for 90%and 100%design submittals <br /> for review and comment by DD5. This work will be performed along with the previously approved <br /> work to design repair for the dike from I-5 to SR-529 (Station DD5-A-343+00 to DD5-A-376+50). <br /> Task Total=$4,900. <br /> Task 4 —Plans, Specification and Estimates. CCI would provide input on construction drawings, <br /> specifications and cost estimate for geotechnical aspects of the project. Drawings will be created by <br /> Otak with review and redline edits by CCI. We anticipate the following sheets would be required to <br /> convey the geotechnical aspects of construction for bidding purposes. <br /> • Site plan and typical sections for repairs from DD5-A-340+46 to DD5-A-343+00 (up to 2 <br /> sheets) <br /> • Typical sections of dike repairs from DD5-A-325+00 to DD5-A-340+46 (up to 3 sheets) <br /> • Details sheet(up to 2 sheets); <br /> CCI will provide input on construction material quantities and conceptual construction costs. This task <br /> includes input to develop an engineer's estimate for budgeting and bidding purposes. Task Total = <br /> $8,150. <br /> Task S—Bidding Assistance. This task assumes Comforth would provide up to 10 hours of assistance <br /> to OTAK and DD5 during the construction bidding process. This task could include responding to <br /> geotechnical related queries, input for construction documents addenda, and input on Contractor <br /> selection. Task Total=$1,900. <br /> Assumptions: <br /> October 18, 2019 2 Cornforth Consultants, Inc. <br />