R2021-14 Resolution Authorizing a Professional Engineering Services Agreement with AECOM Technical Services, Inc. to provide design services for the Ellen and Division Inflow and Infiltration Reduction Program – Phase 2, City Project 2018-01

Home Browse Search

Project Name Completion Date 1 North Lost Bridge Area Preliminary Study Completed in 2017 2 Florian Ave Area Preliminary Study Completed in 2017 3 Basin 5/6 Preliminary Study Com leted in 2017 4 Ellen and Division Preliminary Study Completed in 2018 Professional Services Agreement: Ellen and Division Inflow and Infiltration Reduction Program Phase II. In the October 2020 study session focused on the storm and sanitary systems, direction was provided to City Staff to proceed with the Ellen and Division and Basin 5/6 Areas. The Basin 5/6 Area is a separate project, and a separate services agreement will be brought before Council in the near future. The next phase of the Ellen and Division project is to complete the design for system rehabilitation to remove rain induced I&I. System rehabilitation will consist of the lining of the public sewers, manholes and private laterals. Many aging systems across America suffer with wet weather backups and overflows and experience gained across the industry depicts that the success to removal of the I&I depends on rehabilitating the private sewer laterals along with the sewer main. The private laterals can make up nearly half of the sewer system being hit with rain induced I&I. The goal of the Ellen and Division design is to remove enough wet weather flow to not need any additional work in the basin. If the removal does not achieve a sufficient reduction, the next step is to construct wet weather storage facilities for the system to overflow into. Storage systems are expensive and maintenance intensive. A two-step approach will allow the City to accurately size the overflow tank and sewer mains if it becomes necessary. The Ellen and Division Basin limits are shown in the attached location map, the basin includes approximately 22,700 feet of sewer and 67 manholes serving 500 parcels. The professional services provided by AECOM will provide bid specifications and plans to rehabilitate the Ellen and Division Area. The specifications will be written in a way to provide anticipated bid items to establish unit prices. This method will reduce the design time and cost. The Contractor and City will make the final decision on the rehabilitation methods after a pre- inspection video is completed by the Contractor. The cost for the Ellen and Division Basin Inflow and Infiltration design is not to exceed$79,842. After completion of the plans and specifications the project will be bid and the results will be brought to the City Council for approval. SCHEDULE: Final design services will begin upon approval of the Council and is scheduled for completion in July/August. The project is anticipated to be bid shortly after. POTENTIAL OBJECTION: None INPUT FROM OTHER SOURCES: AECOM