Say Hello to Mary, the Tunnel Boring Queen @MyDCWater

Say Hello to Mary, the Tunnel Boring Queen @MyDCWater

Uploaded October 2025 | Updated September 2026, 2 hours ago

Mary, our Tunnel Boring Machine, is here to dig deep beneath DC! She’ll build the Potomac River Tunnel to protect our rivers from sewage and stormwater overflows during heavy rains. #DCWater

Say Hello to Mary, the Tunnel Boring Queen

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Say Hello to Mary, the Tunnel Boring Queen