Finally! All of the subway and trolley lines are operational

The T is back… sort of.

Monday marked the first time since February 1 that all subway and trolley lines were operational.

This winter, which dumped more than seven-and-a-half feet of snow on Boston in a three week period, wreaked havoc on the T’s antiquated system: Third rails froze over. Old subway car propulsion motors couldn’t handle the snow went on the fritz, crippling the T’s ability to operate.

Delays and cancelations were commonplace, with shuttle buses replacing the subway for some stretches. Commuter frustration was palpable and amid the chaos, MBTA GM, Beverly Scott, announced she was resigning this spring.

As of last week, Scott said it would take at least 30 days to get the T back on track. Things, however, have apparently changed.

On Monday, there was service to all lines. But while all of the track infrastructure is back in service, the T is still working on fixing subway cars.

As of Monday afternoon, there were 438 subway cars and trolleys available for service, up from 364 last Thursday.

MBTA machinists are working “around the clock” fixing the remaining cars — typically, 482 cars are needed to satisfy typical weekday ridership demands, said MBTA spokesman Joe Pesaturo through an email.

“Until we reach that number, the MBTA will not be at ‘full service,’” he said.

The T did not have a cost estimate for the recent string of storms. Pesaturo indicated the MBTA. which is already saddled with $9 billion worth of debt, would be calculating “all of its winter storm-related recovery costs in the coming weeks.”

The T estimated that 6.5 million cubic feet of snow and ice had to be cleared from MBTA rights of way so that trolleys and trains could operate. The T has had to look outside of the state for snow removal equipment and workers in recent days to clear the tracks. Public agencies from Vermont, Pennsylvania and New Jersey loaned equipment that included 72 dump trucks, 33 front end loaders, 12 skid steers and 11 backhoes.

Gov. Charlie Baker deployed the National Guard and hundreds of soldiers helped the T dig out in recent days. Dozens of inmates were also used to shovel this past weekend.