#PotomacRiverTunnel
That post-cross-Atlantic glow just hits different✨Mary’s en route from Germany, and she’s never looked better. #DCWater #PotomacRiverTunnel
August 13, 2025 at 4:42 PM
🛠️ Different strengths
🌎 One mission
💥 Big infrastructure moment ahead.

#PotomacRiverTunnel #DCWater
December 22, 2025 at 8:46 PM
Introducing Mary & Emily, two TBM queens about to dig 5.5 miles under the Potomac. 💪💧

#PotomacRiverTunnel #DCWater
December 22, 2025 at 8:46 PM
Ever wonder what’s going on by the Watergate?👀
We’re building the Potomac River Tunnel, a 5.5-mile underground system keeping millions of gallons of sewage out of the Potomac. This is the kind of investment that will protect the river for generations. #PotomacRiverTunnel #DCWater
September 17, 2025 at 7:40 PM
From Mary the TBM’s arrival to shaft excavations, 2025 was a BIG year above and below ground for the #PotomacRiverTunnel. Thanks for following along…the best is yet to come. 🌀

What was your favorite tunnel moment this year? 🤩 #DCWater
December 30, 2025 at 2:21 PM
West Potomac Park is showing off MAJOR progress above ground and below.

Mary the TBM has all her key components on-site.

Look closely and you’ll find:
🛡️ Shields
⚙️ Cutterhead
🏗️ Slurry + water treatment

Neat, right?

#PotomacRiverTunnel #DCWater
December 15, 2025 at 10:39 PM
This is what progress looks like from 30,000 ft. 👀 Under West Potomac Park, DC’s next big infrastructure milestone is taking shape. Those holes? Future homes for our tunnel boring machines. West Potomac Park isn’t just scenic, it’s transformative. 🙌 #PotomacRiverTunnel #DCWater
June 25, 2025 at 8:06 PM
Later this summer, Mary—the first TBM for the Potomac River Tunnel project—will arrive in DC from Germany. But she’s not just here to dig. Mary will write a new story about a cleaner river. 💧🌊 #WaterWisdom #DCWater #PotomacRiverTunnel
June 18, 2025 at 2:23 PM
DC Water lowers TBM cutterhead underground, ready to begin boring the Potomac River Tunnel - tinyurl.com/58fe4hj2

#Aspermont #DCWater #TBM #Tunnelling #PotomacRiverTunnel #WashingtonDC #Infrastructure
January 23, 2026 at 8:36 AM