From Mandate to Milestone: Implementing a Major CSO Program in 7 Years-Video

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Video Summary

Alexandria Renew’s $454 million RiverRenew project is building a two-mile, deep soft-ground tunnel to capture combined sewer overflows and convey them to the wastewater treatment plant. Mandated by Virginia to be complete by July 1, 2025, the project required design, approvals, procurement, and construction within seven years. Tight plant and community sites, historic buildings, extensive public engagement, and a competitive underground-construction market added complexity, alongside COVID-19, shutdowns, supply-chain disruptions, and labor shortages. A fixed-price design-build approach and close collaboration with contractors and residents helped keep the program on schedule.

Keywords

RiverRenew

combined sewer overflows

deep tunnel

design-build

wastewater treatment plant