The two gubernatorial candidates spoke about their opposition to a proposed ballot on oil and gas well buffer zones during an energy convention in Denver.
The industry is facing a looming measure that cut put limits on where new wells are placed.
Anadarko Petroleum said it inspected and tested pipelines connected to the wells before returning them to service.
Colorado oil and gas regulators are raising taxes on energy developers to help pay for the environmental impacts of drilling.
The Colorado Oil and Gas Conservation Commission opens two days of hearings on regulations for installing, testing and shutting down flow lines
The Colorado Oil and Gas Conservation Commission said Thursday the number of pipelines that failed represents 0.35 percent of the lines tested.
It's one of seven steps recommended by state regulators who reviewed oil and gas operations at Hickenlooper's direction after the explosion.
Public lands belong to the public, and as such, they should be used for the financial value of their oil, gas and timber, Interior Secretary Ryan Zinke told the Western Conservative Summit.
Colorado Gov. John Hickenlooper said Friday that the state had joined a lawsuit over the delay brought by environmental groups.
Anadarko Petroleum said late Friday the pipelines that failed the test are being repaired and will be re-tested.
Friday was the deadline for companies to test those lines for leaks, and about 9,500 test results had been made public by mid-day.
You can’t make money from the trees you don’t cut down, Interior Secretary Zinke tells Western governors
"There's a consequence of not using some of our public lands for creation of wealth and jobs," Interior Secretary Ryan Zinke said.
The air pollution contributed to ozone pollution along the Colorado Front Range, according to a civil complaint. Ozone can lead to smog.
Noble Energy to move 100 employees from Denver
The site is about 4 miles north of an Anadarko gas well in Firestone that was linked to a fatal home explosion in April.
The action was voluntary. Colorado state regulators said they did not order it.
Colorado Republicans used a late-night filibuster Monday to block a first-of-its-kind requirement that oil and gas producers provide the locations of all their gas lines.
Two House Democrats have proposed a bill to force energy drillers to provide state regulators the locations of all their gas lines.