Wednesday, April 7, 2021 9:03 am New York City Department of Environmental Protection (DEP) Commissioner Vincent Sapienza has announced that work has been completed on the final concrete lining for the Delaware Aqueduct Bypass Tunnel, marking another significant milestone in the project to repair the longest tunnel in the world. The Delaware Aqueduct supplies roughly half of the water consumed in New York City every day and the ongoing repair project is critical to ensuring the long-term sustainability of the City’s water supply system. “More than 9 million New Yorkers count on us to provide them with high-quality water every single day of the year – without fail – and this complex repair of the Delaware Aqueduct will ensure we meet that essential mission for generations to come,” said DEP Commissioner Vincent Sapienza. “We are grateful to the skilled engineers, construction experts and local laborers who completed the concrete lining of the bypass tunnel and kept the largest repair in the history of New York City’s water supply system moving forward on budget and on schedule.”