AlexRenew Celebrates Tunnel Completion on 'Hazel Day'

In the summer of 2022, Treatment Plant Operator first reported on a new 380-ton, 14-foot 8-inch tall tunnel boring machine (TBM) named Hazel that had been unveiled by AlexRenew — Alexandria, Virginia’s wastewater authority — marking a significant milestone in its RiverRenew program to improve local waterways. Hazel completed her 2.2-mile waterfront tunnel dig in March, marking the most critical milestone yet in the largest infrastructure project in Alexandria's history. And in April, AlexRenew commemorated "Hazel Day" with an Open House at the RiverRenew Pendleton Street site. Over 1,000 community members of all ages joined the RiverRenew crews and were able to see Hazel the