Sewer pipes have a long shelflife, but even sturdy cast iron pipes need updating. In Fremont, the two original siphons that carry sewer and stormwater from a 100 square mile area – sometimes as much as 220 million gallons per day – have reached the end of their near century of operation, and are now being replaced. To do that, in tunnels SWIZY, a microtunneling machine (seven feet in diameter) that channeled its way underneath the Ship Canal from Fremont to Queen Anne and lay the groundwork for a new set of cast iron pipes.
Community outreach was important during the design process leading up to construction of the two new 5-foot diameter siphons. There are many stakeholders in the densely populated neighborhoods of Fremont and Queen Anne, including residences, businesses and institutions. EnviroIssues helped the County hold a series of design workshops to understand community values and gather feedback to help the technical team design the look and feel of a new odor control facility associated with the siphons (odor control is important. We’re talking sewage here). Together, the community and the County landed on a historic look to the facility, and EnviroIssues will remain on the project throughout construction, staffing the construction hotline and keeping the public up to date as construction progresses.