2011/10/05 Council Agenda Packet

I One 4-hour data review meeting is anticipated with the City and others as the City may require in order to discuss comments and clarify the basis of Task 200 work. This meeting will serve as the kick-off meeting for this project. Site Reconnaissance. The design team will conduct a site visit and walk the project area to understand field conditions and potential project challenges. The City or other agency representatives may participate in the site visit and share project knowledge and concerns. The Consultant will coordinate with the City prior to conducting any site visits. The Consultant will prepare a Technical Memorandum to summarize significant discussions and observations. Field Surveying. The design team will set basic ground control and conduct field surveys to identify basement elevations of up to 60 homes with basements, generally located where virtual basements are shown in Figure 4-21 of the OTAK report mentioned previously._ Actual properties to be surveyed will be based on City-conducted survey, field spot observations, and historical knowledge of the City of know basement flooding events. Basement elevation survey will be determined following notification of property owners by the City. The Consultant, through. their surveyor, will also provide up to one full day of miscellaneous field measurements and documentation of regulator and overflow structures and other identified manholes for which elevations or survey information is required. Development and Modeling of Alternatives. The Consultant will review model and inventory data to determine if critical elements and elevations are needed. Any changes to the existing model will be verified and reviewed with the City. Using the data provided and clarified, the Consultant will complete an initial model run using the Otak-prepared SWMM model for the Sewer M study area to establish dry and wet weather flows tributary to the CS in the portion of the project area affected by basement flooding. The Consultant will complete a field reconnaissance, review GIS data, and then propose up to six alternative alignments for the new SD bypass pipelines. The Consultant will display alignment alternatives in conjunction with information from GIS mapping and prepare a planning level cost estimate. A brief Technical Memorandum, Alternatives Development will summarize this information and provide the rationale for the alternatives for City review and comment. One 4-hour workshop is planned to review alternatives and make shortlist. After City review, the Consultant will model 6 selected alternatives. A Draft Technical Memorandum, Alternative Analysis will describe results and provide a recommendation for the alignment of the SD bypass pipeline in draft. One 4-hour review meeting is planned. A preferred alternative will be selected as a result of the review meeting and City review. The final Technical Memorandum will be incorporated into the Basis of Design Report, Task 500. Deliverables: • Written comments on data and models • Agenda and meeting notes, two review meetings • Alternatives Development, Technical Memorandum, 10 copies September 2011,r3.0 Page 6 of 10 Jacobs Engineering Group Inc. 18