Authorities from Washington, D.C.‘s Water and Sewer Authority expect the full repair of the sewage pipe that ruptured near Cabin John, Maryland, to take over nine months.

DC Water officials held a briefing before a Maryland House of Delegates subcommittee on Friday, in which they explained the full repair process to address the Jan. 19 Potomac Interceptor sewer line collapse. The collapse, which has allowed 243 million gallons of raw sewage to overflow into the Potomac River, has become likely the largest reported wastewater spill in U.S. history.