D.C. Water Tests Clean Rivers Tunnel System for CSO Reduction
What happened
D.C. Water successfully tested the Clean Rivers system on September 20, 2026, marking a milestone in the company’s larger infrastructure project. The machine, named Emily, is one of two tunnel boring machines being used for the Clean Rivers Project. This multibillion-dollar effort is designed to capture stormwater and sewage before it overflows into the District’s waterways, with completion expected in 2030.
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Why it matters
The project is valued at $3.2 billion and aims to mitigate combined sewer overflows into the Potomac and Anacostasia Rivers. The successful testing of the underground tunnel system is a critical step toward the project's goal of long-term river cleanup and infrastructure stability.
From wtop.com
Who's involved
- Anacostia RiverRecipient of the tunnel project aimed at reducing combined sewer overflows
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The entities involved
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Anacostia River
tributary of the Potomac River in Maryland and Washington, D.C.