2022/12/14 Council Agenda Packet

EXHIBIT A-1 City of Everett Lift Station #15 and Force Main Amendment No. 3 Scope of Work — Additional Design Efforts November 28, 2022 Introduction The City of Everett owns and operates a domestic wastewater "lift station" (hereinafter referred to as the "existing station") immediately adjacent to an existing City -owned bridge along W. Mukilteo Blvd. The existing station is situated on the north side of the road, on a steep bank above Edgewater Creek, immediately west of Shore Ave. The existing station is west of the City's Edgewater Park, a 1.25-acre neighborhood park. The park includes limited parking immediately east of the existing station/west of the park, a large lawn and sport and play areas. The City entered into an Agreement with CHS Engineers, LLC (CHS) on May 4, 2020 (Agreement) to evaluate and recommend improvements to the City's sewer infrastructure in the area of the City described above. Amendment No. 1 to this Agreement, effective July 22, 2020, assigned the Contract to David Evans Associates, Inc. (DEA) who acquired CHS. Amendment No. 2 to the Agreement, effective June 23, 2021, provided for the design efforts required to construct a force main along Shore Avenue and pump station in or about the park area. The Agreement and two amendments may be referred to collectively as the "Agreement, as amended". Additional Design Efforts - Amendment No. 3 The City requested regular progress meetings and those have been conducted with the design team through the 95% design for both project elements. The City's bridge replacement project has been deferred by one year and the City elected to complete the lift station project after the bridge project, due to conflicting uses of the bridge project staging area. This extension will prompt additional project monitoring and control work, at times during the deferral period, and allow shifting the final intersection overlay work to the lift station project. Due to long -lead times in the current market, the City elected to pre -purchase the generator and automatic transfer switch, as a separate procurement process. The additional design work detailed below is to be included in this Amendment No. 3: • Development and evaluation of additional three alternative station layouts for the station primary structures and power and control equipment were requested, for consideration by City Public Works and Parks departments, including the following: • Wet well and vault within west fenced area of Edgewater Park; generator and electrical and control panels at opposite side of Shore Ave. to the west • All equipment in southwest corner of Edgewater Park, linear configuration of generator and electrical and control panels • All equipment in southwest corner of Edgewater Park, condensed configuration with generator flanking electrical and control panels • The preferred location of the pump station power and control equipment, including standby generator, was changed by the City to the west side of Shore Avenue immediately north of David Evans and Associates, Inc. Page 1 of 4