The Lower North Branch Capacity Upgrade Phase 1 (CC Lower) consists of upsizing approximately 9,500 linear feet of existing 15-inch gravity sewer to 36-inch gravity sewer. The project limits will begin at 28551MH and will terminate at 25844MH. The project limits and recommended sizing of the gravity sewer line were determined by the CITY and Hazen and Sawyer’s system hydraulic modeling study (Hazen and Sawyer, 2014), 2018 Collection System Master Plan, and ongoing 2020 Major Wastewater Collection and Transmission System (WCTS) Master Plan Updates.
This project is to support sewer annual contracts for the different methods of rehabilitation of pipelines less than 15" diameter (8" - 12"). The Rehabilitation Contract incorporates alternate methods of rehabilitation to include cured-in-place pipe (CIPP) lining, complete line replacement, as well as pipe bursting and other rehabilitation techniques. The rehabilitation techniques generally add 50+ years to the life of the structure.