2019/11/20 Council Agenda Packet

J 2513-3 • Drawings/sketches will be created by Otak with review and redline edits by CCI(up to 7 sheets) • Existing design and/or as-built documents related to repairs from Station DD5-A-325+00 to DD5-A-343+00 (Reaches 1,2, and 3)will be provided by Otak. • OTAK/DD5 will provide updated periodic inspection reports, summary of observed deficiencies,as-built drawings from USACE dike repairs, and current photographs of Reaches 1, 2, and 3. • Design of a floodwall or design for complete replacement of the dike is not included in this scope. • The design criteria for top elevation of the dike under I-5 will be as high as practical given the space constraints from the elevation of the Interstate-5 bridge girders. The bottom elevation of the bridge girders generally ranges from 15.1' to 16.0' NAVD88, and therefore the top elevation of adequately compacted dike fill will be limited by the girder elevation. • No additional site visit and explorations are anticipated to be performed by CCI Cost Estimate and Timeline Our estimated cost to complete the scope of work outlined above is a Not-to-Exceed sum of$25,400. This amount would not be exceeded without your prior authorization. We would perform the work in coordination with Otak's schedule with The City of Everett with a completion schedule at approximately 36 weeks from receiving Notice-to-Proceed(NTP). We appreciate the opportunity to be of continued service. If you have any questions,please feel free to call Wade N. Osborne at(503)452-1100. Very truly yours, CORNFORTH CONSULTANTS,INC. Michael R. Meyer,P.E. President October 18,2019 t 6 Comforth Consultants,Inc.