2006/05/17 Council Agenda Packet

EXHIBIT A-3 SCOPE OF WORK D. Prepare a Predesign Memorandum. The predesign evaluation will be summarized in a memorandum describing the proposed design concept and the recommended design parameters. This document will be a prepared as a stand alone document separate from the previous Phase 6 Predesign Memorandum dated October 2003. The memorandum will present the following: introduction and background information, description of existing conditions, proposed construction methods and sequencing, permit requirements, and project implementation (i.e. preliminary cost estimates and schedule) for the selected HDD project configuration. This memorandum will be provided to DOH and other appropriate regulatory agencies in support of permit applications. The Predesign Memorandum will reference and attach the findings presented in the Geotechnical Design Memorandum and the HDD Basis of Design Report prepared under Task 5. Meet with the City to receive comments and review the draft submittal. Eight (8) copies of the draft and eight (8) copies of the final memorandum will be provided to the City. The final memorandum will be prepared after completion of the predesign workshop described in Task 6E below. E. Predesign Workshop. Prior to completing the final Predesign Memorandum, a Predesign Workshop will be conducted at the City's office to discuss the Phase 6 predesign conclusions and recommendations. The purpose of the workshop is to provide City staff an opportunity to discuss and understand the important decisions presented in the Predesign Memorandum and obtain consensus from City staff before proceeding with final design. In particular the MWH project team will lead interactive discussions with City staff on the following topics: HDD preferred alignment and staging requirements, construction sequencing and schedule, operational and maintenance considerations, HDD installation risks, permitting requirements and recommended approach for bidding the project. The workshop duration will be up to one full day. F. HDD Lessons Learned. A brief summary of lessons learned will be compiled for four to five previously completed large diameter HDD projects. The compiled information will assist MWH in identifying and mitigating potential project risks during the final design by incorporating appropriate design criteria into the contract documents. BSE will contact the client for each HDD project along with the project engineer and HDD contractor as appropriate, to obtain information pertaining to project conditions, design criteria and contract requirements and project construction. In particular, the lessons learned will focus on field changes, problems and/or claims that may have occurred during the construction period and identifying approaches that may have been taken that could help minimize these events from occurring on the Phase 6 HDD project. G. Scope Review. The subsequent preliminary design drawings, final design and permitting work will be based on the approved concepts and layouts as established in the predesign memorandum developed in Task 6. For the purposes of this scope of work and the associated budget for the remaining tasks, it is assumed that the HDD alignment will be constructed parallel to the existing pipelines (and located within the City's transmission corridor easement) with transition sections connecting to the existing pipeline on either end of the Phase 6 project. The design of the west transition section will use a pile-supported elevated pipeline. The design of the east transition section will use either a pile-supported elevated or buried pipeline. Based on the predesign efforts completed per Task 6, the 47 MWH Page 7 EVERETT PHASE 6 HDD PROJECT 5/1/06 EXHIBIT A-3-SCOPE OF WORK