2006/05/17 Council Agenda Packet

7 EXHIBIT A-3 SCOPE OF WORK remaining project work scope will be reviewed by the City and Engineer. No significant changes in the preliminary design concept, added alternatives nor other changes to the planned bid document content will be made except through mutual agreement between the City and Engineer, including applicable scope of work and budget revisions. Task 7. Preliminary Drawings Prepare preliminary plan drawings to be presented on half size sheets (11 by 17 inches). The drawings will use a scale of 1-inch equals 20 feet for the plan and profile (based on full size drawings). The drawings will show stationing, existing utilities and transmission lines, any planned construction by others, existing pipeline locations, geotechnical boring locations, critical areas, proposed mitigation measures for critical areas (i.e. restoration), and preliminary details for connections and appurtenances. It is assumed that the restoration strategies developed for the permitted pile- supported elevated pipeline design can be applied to the west pipe connection area and the east pipe connection area located west of Home Acres Road. However, if the east end connection of the Phase 6 pipeline is located east of Home Acres Road, one (1) additional restoration drawing will need to be prepared. The plan set will be completed to an approximate 30 percent level of effort for environmental (JARPA) permit submittals. Task 8. Permit-Related Studies To prepare this scope of work some assumptions have been made to serve as the basis for determining the appropriate level of effort required for this project including Tasks 8, 9, and 10. The assumptions made are as follows: 1. The HDD alignment parallels the existing water pipelines within the current City of Everett transmission corridor easement. The pipeline connection transition section located west of the proposed HDD section, construction method, access, and staging area will be similar to the previously permitted pile-supported elevated pipeline configuration and construction approach. 2. The pipeline connection transition section located east of the HDD will need additional staging area compared to the area available from the previously permitted (2005) Phase 6 project. It is assumed that preliminary design considerations for the east pipeline connection will focus on: 1) location of pipe connection (west or east of Home Acre Road); 2) construction method (pile-supported elevated or buried); and 3) staging area requirements. 3. Overall sensitive area impacts for the HDD alignment will be significantly less than the permitted(2005)Phase 6 pile-supported pipeline project. 4. No wetland delineation (field) work will need to be conducted. If additional staging area is identified outside the limits of the wetland delineation survey conducted for the permitted (2005) Phase 6 project then additional field work may be necessary. Any additional field work is beyond this scope and will be covered under Section V- Additional Services. MWH Page 8 EVERETT PHASE 6 HDD PROJECT 5/1/06 EXHIBIT A-3—SCOPE OF WORK