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Scope of Services <br /> Continued <br /> e. Sewer system improvement with new separated sewer systems from 13th and <br /> Oakes to the 17th Street Interceptor. <br /> f. Sewer system improvement with new separated sewer systems from 13th and <br /> Oakes to the Broadway Interceptor. <br /> Some variations on scenarios d., e., and f. may include or exclude the tailwater affects of <br /> flow in the 17th Street Interceptor. Otak will attend several meetings with the City to <br /> receive direction, discuss alternatives and ideas,and to review results of modeling and <br /> recommended system improvements. <br /> 4. Technical Memorandum <br /> Otak will prepare a technical memorandum for submittal to the City describing the <br /> methods,process, and results of the Phase 1 analyses, and recommendations/alternative <br /> solutions (Draft 7/23/2010 and Final at the end of August). <br /> Task 10. 1— Phase 2 Evaluation of Near-Term and Long-Term <br /> Actions <br /> Phase 2 of the work under this amendment (North End Combined Sewer System <br /> Evaluation) is a more comprehensive analysis of the sewer system in the study area including <br /> the 17th Street Interceptor, tributary collection systems and lift station flows as well as other <br /> trunks and flow regulators, and in particular, flow conveyance to the Siphon Headworks,the <br /> Broadway trunk and the system downstream leading to the Snohomish River CSO <br /> Interceptor. The objective of Phase 2 is to evaluate near-term and long-term alternatives to <br /> define and prioritize future system improvements that would reduce flooding potential in the <br /> study area, and effectively route peak flows downstream. Capital improvement projects that <br /> might emerge from this effort could be scheduled for design and construction during 2011. <br /> I . Update Study Area Hydrology <br /> a. Update stormwater and sewer basin boundaries based on any updates to <br /> combined sewer infrastructure,in task 10.1.2c. <br /> b. Hydrologic input for the 17th Street Interceptor system.Will include sewer lift <br /> stations #2 through#8 functioning with actual wet well levels and associated <br /> overflows included. <br /> c. Hydrologic input for the Broadway Interceptor system. <br /> d. Update land cover data for a pre-2008 land use: existing land cover except that <br /> the Providence Hospital tower was a parking lot, the new parking lot was houses, <br /> and the CUP was a school (pool) with ball field. <br /> City of Everett—North Everett Combined Sewer System Evaluation 6 <br /> otak <br /> K:\project\31500\31520\Contract\Amendll_NAreaFlooding\31520 Everett Sewer Amendment 1 Scope082510.doc <br /> 8 <br />