DC Water commenced excavation on its $819 million Potomac River Tunnel Project, deploying a colossal tunnel boring machine named "Mary" on a northbound route. The initial rotation of the machine's giant cutterhead represents a major milestone, transitioning the monumental infrastructure initiative from years of meticulous planning into active underground construction.As the excavation advances, crews will progressively attach trailing support sections until the fully assembled machine reaches 700 feet in length, 21 feet in diameter and weighs 1,200 tons.Austin Water Breaks Ground on WWTP ExpansionAustin Water and city leaders recently broke ground on a $1.5 billion expansion of the Walnut Creek
