By Pat Loeb

PHILADELPHIA (CBS) — Philadelphia officials are pledging to have the city streets cleared of snow by the end of Wednesday as clean up continues from what they say is the city’s fourth largest snowstorm ever.

They’re asking citizens for continued patience.

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Deputy Managing director Clarena Tolson says the city’s primary routes are passable and snow removal efforts are now focused on smaller streets, which create a challenge.

“The amount of snow that we have is larger than the plow we can fit in to the street,” said Tolson.

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She says the city uses front end loaders to physically lift the snow out which can take a half-hour to 45 minutes, as opposed to the 2 or 3 minutes a plow takes. But she says every single piece of snow removal equipment is in use, though she expects trash collection to resume Tuesday.

Mayor Jim Kenney praised citizen cooperation with snow emergency measures and asked for more.

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“If it’s your street and if you’re not out yet, you’re frustrated and I recognize that but we have to do this in a methodical way so the city gets back to work as soon as possible,” said Mayor Kenney.