Corrosion, Collapse, and Clean-Up: Examining the Potomac Interceptor Collapse

Environmental Permitting and Water InfrastructureHouse Energy and Commerce Subcommittee on Oversight and Investigations · May 20, 2026 · 119th Congress
The House Energy and Commerce Subcommittee on Oversight and Investigations convened this hearing to examine the January 19, 2026 collapse of DC Water's 54-mile Potomac Interceptor sewer pipe, which released roughly 240 million gallons of raw sewage into the Potomac River [0:16:27]. Begins at ▶ 0:15:34
Transcript
Highlights

Title

Federal oversight hearing on the Potomac Interceptor sewer collapse

Purpose

The House Energy and Commerce Subcommittee on Oversight and Investigations convened this hearing to examine the January 19, 2026 collapse of DC Water's 54-mile Potomac Interceptor sewer pipe, which released roughly 240 million gallons of raw sewage into the Potomac River▶ 0:16:27. Members heard from federal responders (EPA, Army Corps of Engineers, National Park Service) on a first panel and from DC Water and a water-infrastructure advocate on a second panel, probing the causes of the collapse, the permitting delays that preceded it, the federal emergency response, and broader funding needs for aging water infrastructure nationwide. Begins at▶ 0:15:34

Who spoke

• Chairman John Joyce (R-PA)▶ 0:15:34: Opened the hearing describing the 240-million-gallon overflow and its public health, environmental, and economic impacts▶ 0:16:27; later pressed the National Park Service and Army Corps on notification timelines and containment measures▶ 0:44:54▶ 0:47:35.

• Ranking Member Yvette Clarke (D-NY)▶ 0:19:43: Said the spill was one of the worst sewage overflows in U.S. history and blamed avoidable delays in DC Water's known repair plan▶ 0:20:11▶ 0:20:34; criticized the administration's East Wing demolition debris dumping and proposed EPA budget cuts▶ 0:21:41▶ 0:22:07; later pressed Col. Pera on the inadequacy of a 12-hour secondary water reservoir expansion▶ 0:54:09▶ 0:55:08.

• Chairman Brett Guthrie (R-KY), Full Committee▶ 0:23:07: Called the spill "not a minor incident," noting 240 million gallons equaled roughly 360 Olympic pools▶ 0:23:54; later grilled NPS's Wenschhof over whether environmental review delays contributed to the collapse▶ 0:57:05▶ 0:58:32, and pressed DC Water's Gadis on repeated project rescoping that restarted environmental assessments▶ 1:29:53▶ 2:31:16.

• Ranking Member Frank Pallone (D-NJ), Full Committee▶ 0:25:46: Cited a $150 billion water-infrastructure repair shortfall and entered EPA's Clean Watersheds Needs Survey into the record▶ 0:26:41▶ 0:27:08; criticized the administration's proposed 86%/90% cuts to state revolving funds▶ 0:27:34; later pressed Kramer on the $1.2 trillion national water infrastructure need▶ 1:03:23.

• Jessica Kramer, EPA Assistant Administrator for Water▶ 0:31:33: Testified EPA was notified January 19 and led a coordinated federal response after DC declared an emergency February 21▶ 0:33:58; said the collapse did not threaten drinking water because it occurred downstream of the Aqueduct's primary intake▶ 0:36:05; disclosed EPA has found $14.8 billion in uncommitted state revolving fund dollars▶ 1:03:53; declined to say the collapse's cause was under litigation▶ 1:46:01; acknowledged she personally should have been informed of pipe risk earlier▶ 1:19:53.

• Colonel Francis Pera, U.S. Army Corps of Engineers, Baltimore District▶ 0:36:59: Said drinking water remained safe because the Great Falls intake, 5.8 miles upstream of the collapse, supplied all water while the Little Falls intake was closed▶ 0:37:29▶ 1:08:39; described installing a stormwater diversion system within a week▶ 0:39:21; testified the region's water storage buffer is only about 12 hours▶ 1:12:01; agreed a breach further upstream could threaten drinking water▶ 1:09:07.

• Edward Wenschhof, Acting Superintendent, C&O Canal National Historical Park, NPS▶ 0:41:04: Described NPS permitting DC Water to bypass the collapse through the canal starting January 24▶ 0:42:40; said permit reviews can take six months to a year absent an emergency, and NPS verbally authorized emergency repairs within a week of the collapse▶ 1:20:21▶ 1:31:37; repeatedly deferred detailed pre-collapse permitting questions to pending litigation▶ 1:00:49▶ 1:16:02.

• Rep. Kim Jet Amodei (D-CO)▶ 1:12:29: Established the timeline of federal notification (Jan. 19) versus DC's emergency declaration (Feb. 18-20)▶ 1:13:26; cited a Washington Post investigation that DC Water sought fast-track repair permits in 2018 warning of "catastrophic failure" risk▶ 1:15:31; entered the article into the record▶ 1:17:03.

• Rep. Gary Palmer (R-AL)▶ 1:17:55: Established all three federal witnesses learned of the pipe's condition only after the break, not before▶ 1:18:23; said this represented a "failure to communicate" that could have been avoided▶ 1:21:09; in a later round, pressed DC Water's Gadis on why an approved emergency contract for pipe repair was never executed▶ 3:43:24▶ 3:47:05.

• Rep. Paul Tonko (D-NY)▶ 1:23:53: Entered into the record President Trump's Truth Social posts blaming Maryland's governor for the spill▶ 1:24:18; pressed Kramer on whether EPA agreed the "radical left" caused the corrosion▶ 1:24:42; later questioned DC Water and Neltner on lead service line replacement funding▶ 2:23:59.

• Rep. Jon Husted's seat / Vice Chairman Troy Balderson (R-OH)▶ 1:07:49: Established Great Falls intake is 5.8 miles upstream and Little Falls 4 miles downstream of the collapse▶ 1:08:17; pressed Pera on regional water storage capacity, learning it is about 12 hours▶ 1:11:37.

• Rep. Diana Harshbarger (R-TN)▶ 1:29:19: Questioned Wenschhof on NPS permitting timelines (right-of-way vs. special use permits, 6-12 months standard) and emergency NEPA procedures▶ 1:29:49▶ 1:31:37; in the second panel, asked DC Water about contractor mobilization speed and after-action review plans▶ 2:39:43▶ 2:42:34.

• Rep. Alexandria Ocasio-Cortez (D-NY)▶ 1:33:08: Pressed Kramer on complaints about data center construction degrading drinking water quality, displaying jars of discolored water from Morgan County, Georgia▶ 1:35:37▶ 1:36:06; Kramer said she was unaware of such complaints but would look into it▶ 1:37:03.

• A committee member questioning on town hall attendance (Rep. Craig Goldman or similar, unidentified by name)▶ 1:38:51: Asked witnesses about a DC Water town hall the previous night and working relationships between agencies▶ 1:39:47▶ 1:40:21.

• Rep. Rick Allen (R-GA)▶ 1:44:39: Asked Col. Pera about the challenges of rapidly building the diversion system in winter, noting only ~24 hours to design and prioritize before rain threatened the pump system▶ 1:44:39▶ 1:45:05; questioned Wenschhof on C&O Canal remediation and asked about DC water pressure complaints▶ 1:46:52▶ 1:48:35.

• David Gadis, CEO/General Manager, DC Water▶ 1:56:37: Testified DC Water knew of concerns about the collapsed section and had it on its capital plan since 2018, but permitting took eight years and was still not complete at the time of collapse▶ 2:00:08▶ 2:31:16; said 18 tons of boulders sitting atop the pipe exacerbated the failure▶ 1:59:22; disclosed the cause of the collapse itself has not been determined▶ 2:29:26; said federal agencies did not join the response for about two and a half weeks after DC Water built the bypass alone▶ 2:13:19; could not explain why an approved ~$45 million emergency contract was never executed▶ 3:45:26.

• Tom Neltner, National Director, Unleaded Kids▶ 2:01:41: Said EPA estimates 23,000–75,000 sanitary sewer overflows occur nationally each year, releasing 3–10 billion gallons of untreated sewage▶ 2:02:53; cited a $630 billion 20-year need for clean water infrastructure, including $110 billion for aging sewers▶ 2:05:02; criticized EPA's proposed 86% cut to state revolving funds and noted EPA spent only 26% of FY25 WIFIA funds▶ 2:05:27▶ 2:06:01.

• Rep. Randy Weber (R-TX)▶ 3:35:35: Noted a full month elapsed between DC Water's January 19 awareness of the collapse and Mayor Bowser's February 18 emergency declaration, during which roughly 243 million gallons flowed into the river▶ 3:36:28▶ 3:37:18; asked Gadis about DC Water's role in advising the city government on the emergency declaration▶ 3:37:48.

Key moments

• DC Water CEO David Gadis testified the collapsed section was flagged for repair as early as 2018 and permits were submitted then, but permitting with the National Park Service was still not complete eight years later at the time of the January 19 collapse▶ 2:00:08▶ 2:31:16.

• Gadis disclosed that DC Water still does not have a permit for repairs today, and that the cause of the actual pipe collapse itself has not been determined — only that 18 tons of boulders sitting atop the pipe worsened the failure▶ 2:29:26▶ 2:31:16.

• Rep. Palmer revealed DC Water's board approved a roughly $45 million emergency contract to address Potomac Interceptor failures, but Gadis could not explain why it was never executed before the collapse▶ 3:43:24▶ 3:45:26▶ 3:47:05.

• All three federal witnesses (EPA's Kramer, Army Corps' Pera, NPS's Wenschhof) testified they were not informed of the pipe's degraded, potentially breach-prone condition before the collapse, which Rep. Palmer called a "failure to communicate"▶ 1:18:51▶ 1:21:09.

• EPA's Kramer disclosed roughly $14.8 billion in state revolving fund dollars for water infrastructure sits uncommitted in state coffers for a year or more, even as the administration proposes 86–90% cuts to those same funds▶ 1:03:53▶ 1:04:20.

• Rep. Tonko entered Trump's February 16–17 Truth Social posts blaming Maryland Governor Wes Moore and "the radical left" for the collapse; Kramer would not endorse that characterization, instead pointing to a "lapse of awareness" by Maryland regulators▶ 1:24:18▶ 1:25:05▶ 1:25:34.

• Army Corps' Col. Pera testified the region's total water storage buffer is only about 12 hours, and agreed with Rep. Clarke that this would provide "limited utility" if drinking water intakes had to be closed due to contamination▶ 0:54:35▶ 1:12:01.

• Rep. Ocasio-Cortez displayed jars of discolored tap water from Morgan County, Georgia, tied to nearby data center construction and asked EPA to investigate broader water-quality impacts from data center buildout nationwide▶ 1:35:37▶ 1:37:28.

• Gadis testified federal agencies did not join DC Water's emergency response for about two and a half weeks after the January 19 collapse, during which DC Water built the bypass system alone▶ 2:13:19.

• Chairman Guthrie pressed NPS's Wenschhof on a Washington Post report that DC Water repeatedly changed its repair-plan scope, forcing restarted environmental assessments; Wenschhof confirmed at least two scope changes triggered new review▶ 2:30:23▶ 2:30:46.

Metadata

CommitteeHouse Energy and Commerce Subcommittee on Oversight and Investigations
Chamber / CongressHouse · 119th Congress
DateMay 20, 2026
TypeHearing
Witnesses
Colonel Francis Pera — Commander, Baltimore District, U.S. Army Corps of Engineers
Mr. Edward Wenschhof — Acting Superintendent, Chesapeake & Ohio Canal National Historical Park, National Park Service
Mr. David Gadis — CEO and General Manager, DC Water
Mr. Tom Neltner — National Director, Unleaded Kids
The Honorable Jessica Kramer — Assistant Administrator for the Office of Water, U.S. Environmental Protection Agency
Videoyoutube
Transcript355 caption blocks · 26,039 words · 3:49:05 runtime
EventCongress.gov 119293