2021/06/09 Council Agenda Packet

E E V E R E T T City Council Agenda Item Cover Sheet Project title: Professional Services Agreement (PSA) with HDR Inc. for engineering planning and pre -design services for the 17th Street Interceptor Upgrades project Council Bill # Agenda dates requested: 6/09/2021 Briefing Proposed action Consent 6/9/21 Action Ordinance Public hearing Yes x No Budget amendment: Yes x No PowerPoint presentation: Yes x No Attachments: Two PSAs signed by consultant Department(s) involved: Public Works Contact person: Amie Roshak, P.E. Phone number: (425) 257-7249 Email: aroshak@everettwa.gov Initialed by: RLS Department head Administration Council President Consideration: Sign Professional Services Agreement (PSA) with HDR Inc. Project: 17th St Interceptor Upgrades Partner/Supplier : NA Location: 18th St from Cedar Street to Chestnut Street Preceding action: Plans and Systems Ordinance - 5/12, 5/19, 5/26/21 Fund: Fund 336 - Water & Sewer System Improvements Fiscal summary statement: Funding source will be Water & Sewer System Improvement fund. Allocate Funding (by Plans & Systems Ordinance): $550,000 Project summary statement: Recent modeling efforts have found capacity constraints in a section of the 17th Street Interceptor pipe that will result in basement backups and flooding in the upstream basin of the combined sewer system. The cause is due to an undersized section of the interceptor pipe. The section that is undersized is located on 18th Street from Cedar Street to the alley east of Chestnut Street. The work will be done in three phases: 1. Phase 1: Planning and Pre -design (This PSA) 2. Phase 2: Final design and engineering services during bidding (Potential future amendment) 3. Phase 3: Engineering services during construction (Potential future amendment) The engineering services included in Phase 1 of the professional services agreement include hydraulic modeling to better delineate the tributary basin to the interceptor, alternatives analysis, including options for the new pipe alignment and preliminary design for the new pipe. The scope of work also includes operational strategy analysis and recommendations for controlling flow to and from the interceptor pipe, taking into account future conditions and improvement projects. Recommendation (exact action requested of Council): Authorize the Mayor to Sign a Professional Services Agreement in the amount of $319,726 with HDR Inc., for engineering planning and pre -design services for the 17th Street Interceptor upgrades project.