Full flow has been restored to the Potomac Interceptor sewer line outside Washington, DC, ending a nearly two-month, round-the-clock effort to repair the 72-in. pipeline following a January 19 rupture that spilled an estimated 243 million gallons of untreated sewage into the nearby Potomac River. While permanent repair remains ahead for the 1960s-era pipeline and related infrastructure, the District of Columbia Water and Sewer Authority (DC Water) said its focus now is on environmental remediation in the surrounding area, including a one-half-mile-long, previously dry section of the historic C&O Canal in Maryland, which was used as a bypass channel for interceptor flow while emergency pipeline repairs were carried out. Contaminated site cleanup in areas affected by Potomac Interceptor overflows has initially completed but more environmental remediation will be conducted. Photo courtesy of DC Water “What we see here has been Herculean,” said DC Water CEO and general manager David Gadis at a March 17 briefing.…