One month after a collapsed pipeline north of Washington, D.C., spilled about 240 million gallons of raw sewage into the Potomac River and possibly between 300 and 400 million—which could be the largest wastewater spill in U.S. history—efforts are progressing to clear the damaged section and begin repairs despite weather and other impacts.

Reprinted courtesy of Jim Parsons, Engineering News-Record and Debra K. Rubin, Engineering News-Record

Ms. Rubin may be contacted at rubind@enr.com