pipeline

They also question whether the Pipeline and Hazardous Materials Safety Administration is providing adequate oversight of it.

They say some wetlands were affected, but not any sources of drinking water.

The company and regulators said the cause was being investigated.

A hearing is set for Nov. 13 in Linton on the proposed expansion.

Some Democratic candidates have been eager to draw a contrast.

TC Energy argued in Nebraska that the so-called mainline alternative route was a legitimate option.

Opponents filed a lawsuit arguing the company didn't follow all the required procedures for the route that was approved.

It's designed to move 350,000 barrels of oil daily from western North Dakota's oil patch to Cushing, Oklahoma.

"We are pleased with the ruling," TC Energy spokesman Matthew John said. "We look forward to advancing the project."

Several states are considering increasing fines and prison terms for such incidents and holding associated organizations legally accountable as well.