The Miami-Dade Water and Sewer Department on Friday unveiled its new Tunnel Boring Machine (TBM) and christened it Dorsey after D.A. Dorsey, Miami’s first black millionaire. The TBM will bore 75 feet underground and install a 60-inch sewer main from Fisher Island to the Central District Waste Water Treatment Plant on Virginia Key. Students from MAST Academy submitted Dorsey based on his impact to the community. Dorsey worked for Henry Flagler and the Florida East Coast Rail Road Company, and later owned what is now known as Fisher Island, which he sold to Carl G. Fisher. Dana Dorsey Chapman-Lewis, Dorsey’s granddaughter, along with two great grandchildren and three great-great grandchildren attended the name unveiling. They were joined by Miami-Dade Mayor Carlos Gimenez and Commissioner Barbara Jordan.