At least four people were arrested, according to the group Rising Tide Vermont, which organized the protests.
The Addison Rutland Natural Gas Project pipeline, first approved by the Public Service Board in 2013, will run from Middlebury to Colchester, carrying natural gas to 4,000 customers.
Protesters with Rising Tide have been fighting it since 2012.
“I actually think it is criminal to build new fossil fuel infrastructure when we are on the brink of a climate disaster,” said Danby resident Beth Thompson.
She said the battle she fought 18 years ago against breast cancer was small compared with the fight to stop the pipeline.
Thompson and other Rising Tide protesters stood in front of the pipeline construction site off Route 2A in Williston on Monday, temporarily delaying work. About half a mile down the road, activists chained themselves to construction equipment beginning at 5 a.m.
Vermont Gas spokeswoman Beth Parent said work on the pipeline had resumed by 1 p.m.
Parent says “natural gas is a clean, affordable and reliable heating choice.”
Alex Prolman, one of the protest organizers, said one activist who locked herself to equipment was removed and arrested. Another person could not be safely removed right away.
Prolman said three others were arrested at sites in Chittenden and Addison counties.
Prolman said Monday’s action was sparked in part by a major milestone: the beginning of work on the project by Michels Corp., also a contractor for the Keystone XL oil pipeline.
Vermont Gas announced the company’s selection as a contractor in July.
In addition, Thompson said, the protesters were inspired by the recent death of Claire Broughton, who had been fighting to keep the pipeline from crossing her land in Monkton.
Rising Tide’s protests could end up costing its customers. Through an agreement with the Public Service Board, Vermont Gas is able to pass along cost overruns caused by delays such as protests.
Prolman said attributing cost increases to the protests is a distraction from the company’s practices.
The gas the pipeline will carry natural gas produced by hydraulic fracturing, or fracking, said Prolman.
Thompson said the idea that natural gas is a cleaner alternative is a myth. Though methane omits 25 percent less carbon than other fossil fuels, it leaks 86 times more greenhouse gases into the atmosphere, she says.
CORRECTION: The Vermont Gas pipeline expansion was first approved in December 2013, not 2011 as originally reported. Vermont Gas says the pipeline will serve 4,000 customers in Addison. The company has 50,000 customers in Chittenden County.