When New York City’s Croton Water Filtration Plant goes online in 2012, it will filter about 10 percent of the Big Apple’s drinking water.

Shown here is a small portion of the 8,000-foot-long water tunnel that will connect the filtration plant with the aqueduct that that delivers water from more than 60 miles away. The tunnel itself was bored out by a special machine that cut a 13-foot circumference hole in the bedrock. Metal piping now lines the face of the rock, reducing the circumference to its final size of 9 feet.

For more information and more photos, visit www.governing.com.

Photo by David Kidd.

Jessica Mulholland  |  Web Editor/Photographer

Jessica Mulholland has been a writer and editor for more than 10 years. She was previously the editor of Emergency Management magazine, and she loves that she can incorporate her passion for photography into her work as a part of the Government Technology editorial team. Jessica can be reached at jmulholland@govtech.com@jbronwen on Twitter and on Google+.