Photo by PoPville flickr user Jordan Barab
“Metro has completed repairs to the Yellow Line tunnel south of L’Enfant Plaza where water was entering the tunnel earlier today.
The leak was first reported around 11:30 a.m. by a train operator. Metro structural engineers and inspectors responded and determined that the water was entering the system from outside the Metro system. Third-rail power was de-energized for safety reasons.
From 11:30 a.m. until 2:30 p.m., Yellow Line trains were single tracking between L’Enfant Plaza and Pentagon City. Normal two-track service has been restored.
It has not yet been determined whether the source was ground water or from a non-Metro-related pipe outside the tunnel wall.
Customers should expect normal service for the evening commute. As a reminder, Yellow Line trains are scheduled to run less frequently due to SafeTrack Surge #13.”
“Shortly after 11:30 a.m., Metro received a report of water entering the Yellow Line tunnel south of L’Enfant Plaza. Metro removed third rail power on the inbound Yellow Line track. Upon inspection, engineers found water breaching the tunnel wall under pressure (see video below).
While there is no risk to the structural integrity of the tunnel, Metro has taken this action to prevent water from spraying on the electrified third rail. Yellow Line trains are single tracking between L’Enfant Plaza and Pentagon City. The source of the water has not been determined, but all indications are that the water is originating from outside the Metro system.
Yellow Line trains are subject to delays due to single tracking. Green and Blue line trains, while not single tracking, may experience congestion-related delays due to Yellow Line trains waiting to proceed through the single-track zone. Customers on both lines are advised to allow additional travel time.
Metro will provide an update on an estimated time of repair once more information is known.”