The technique involved mixing snow in with the ash on the ground, then plowing it aside.
Alaska Airlines says flights out of Anchorage resumed at 4 p.m., and the first flight from Seattle to Anchorage was scheduled to depart at 7 p.m. PDT. Alaska canceled 45 flights Saturday and Sunday because of the airport closure.
Since Redoubt's initial eruption March 22, Alaska Airlines has canceled about 230 flights affecting more than 10,000 passengers, the company said in a press release.
There have been no additional eruptions at Redoubt since 7:23 p.m. Saturday, according to the Alaska Volcano Observatory. All ash fall advisories expired early Sunday morning.
"In all of these areas it's trace or minor ash," geologist Stephanie Prejean with AVO said. "The most significant ash fall so far has been in Nikiski, Homer and Anchor Point, where one- to one-and-a-half millimeters has been detected. And of course there's a characteristic sulfur smell."
Anchorage's air quality did not suffer despite the ash fall, but precautions still need to be taken.
"The health impacts of the ash fall, as far as lung health go, were relatively insignificant," said Steve Morris, Anchorage Air Quality Program manager. "You're greatest likelihood of exposure is during clean up. So if you're sweeping up the ash, or cleaning up the ash, you should be wearing a dust mask."
Long lines were seen at carwashes all over town, another part of the clean up effort. Ash could become a problem again during breakup, kicking up after the snow melts and it dries out.
"If you don't have a dust mask you can just use a bandana that you can wet down and wear," said Greg Wilkinson, public affairs officer with Alaska Department of Health.
The volcano emitted "a steam-rich/ash-poor plume" around 11:20 a.m. Sunday to a height of 25,000 feet, but AVO is not calling it an eruption.
Seismicity at Redoubt remains well above background, according to AVO.
The National Weather Service extended the flood warning for the Drift River near Mount Redoubt until 4 p.m. Monday. The 6 million gallons of crude oil stored at a Chevron facility there is still safe.
"What we've seen thus far is that any additional lahar activity has been deflected away from the facility to the south by those initial lahar deposits that formed up around the back, the backside of the facility," Coast Guard Petty Officer Sara Francis said.
The Coast Guard plans to visit and survey the facility on Monday.
The Anchorage School District says it will be operating on its normal school schedule Monday; however Superintendent Carol Comeau says they haven't decided whether or not to cancel after-school activities.
Comeau says they will wait to see what the air quality is like Monday morning, and from there they will determine whether or not recess will be held outdoors.
In the meantime, she suggests students cover their faces.
"I think it would be important that if kids are walking to bus stops or to school and parents are concerned about the ash in the air, that they could send them with a mask or some kind of mouth covering that they can use -- a scarf or something," Comeau said.
If the situation involving Redoubt and ash fall changes and school needs to be canceled, the school district will make an announcement at 5 a.m. Monday morning.
People Mover issued a statement Sunday saying it would be operating on its normal schedule.
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