San Antonio Water System Central Sewershed Package 5

WGI is the prime design firm for the Central Sewer Shed Package 5 project to reduce Sanitary Sewer Overflows (as part of the Consent Decree) by rehabilitating and replacing sanitary sewer lines with condition and capacity constraints throughout central San Antonio. Sewershed Package 5 includes three work site packages with 18,000 linear feet of CIPP, pipe bursting/bore, and open cut ranging from six- to 21-inch diameter pipe, totaling an estimated $4.2M in construction. Edgar served as a design task leader for the CIPP package, which included field investigations, review of CCTV, as-builts, block maps, record drawings, and preliminary data from the Basin Planning Consultant teams. Edgar and the design team utilized this data to verify the most effective rehabilitation method and identify potential constructability issues for the multiple sites. Design plans for CIPP segments included traffic control plans (TCP) for commercial and residential areas and included coordination with CoSA/TxDOT for work in their respective ROW. Agency coordination and stakeholder outreach was essential to ensure all impacted parties were aware of design improvements and how they were affected by the proposed improvements.

Additionally, bypass pumping layouts were evaluated, discussed in coordination with bypass pumping contractors and vendors, and incorporated within the proposed TCP. The proposed design packages for CIPP, Pipe Bursting/Bore, and Open Cut are scheduled to be completed in early 2020, with bid phase slated for the summer of 2020.