The cause was being investigated.
He said he wasn't sure, however, whether this Keystone spill will have an impact on current review of the pipeline in the state that's already approved elsewhere, but it certainly will add fodder to those campaigning against oil pipelines.
TransCanada Corp.'s Keystone pipeline system sprang a leak Thursday, only days before a scheduled regulatory ruling on the hotly contested XL proposal for a jumbo addition. The expansion has faced fierce opposition from environmental groups, American Indian tribes and some landowners.
The South Dakota Department of Environment and Natural Resources told South Dakota's KSFY-TV that officials don't believe the leak affected any drinking water systems. The pipeline operator said it cooperating with authorities, including the U.S. Pipeline and Hazardous Materials Safety Administration, which regulates interstate oil pipelines. It did not offer a time estimate, and a spokesman didn't immediately return a telephone message from The Associated Press. Lawmakers argued at the time that pipeline safety was a federal responsibility that pre-empts state law.
According to a release, a drop in pressure was detected and the estimated volume of the leak is 5,000 barrels or 210,000 gallons.
The existing pipeline runs east from Alberta, Canada, through the provinces of Saskatchewan and Manitoba, then turns south and passes through the USA states of North and South Dakota, Nebraska, Kansas, Oklahoma and Texas. It can handle almost 600,000 barrels daily, or about 23 million gallons. He says the primary focus is that TransCanada is on site and addressing the spill.
"EPA is aware of the spill and is receiving periodic updates from the state of South Dakota, which is overseeing response activity at the spill site", he said.
Suzie Easthouse, general manager at the Front Porch in Langford, says the restaurant will provide meals for TransCanada workers who hurried to the Keystone pipeline spill site.
"There's a heck of a south wind up here today, and man it just stunk of crude oil", said Moeckly, whose property is crossed by the pipeline.
The oil spill occurred in a grassy area on rural, private land in which the nearest farm is about a mile away.
A leak and spill in southeastern South Dakota in April 2016 prompted a weeklong shutdown of the pipeline.
According to USA government data, there have been 17 oil leaks in the US larger than the new spill since 2010.
"It is a below-ground pipeline, but some oil has surfaced above ground to the grass", Walsh said.
TransCanada emergency and safety crews, as well as contracted, nationally recognized experts are assessing the situation, with ongoing reports to federal officials. "The section of pipe along a right-of-way approximately 35 miles (56 kilometers) south of the Ludden pump station in Marshall County, South Dakota was completely isolated within 15 minutes and emergency response procedures were activated".
Pipeline opponents, still fighting Keystone XL in the name of breaking oil habits blamed for climate change and environmental degradation, leaped on the accident as proof that Obama's rejection was the correct decision.
"We've always said it's not a question of whether a pipeline will spill, but when, and today TransCanada is making our case for us", Martin said.