The USGS said the Mancos Shale formation holds about 66.3 trillion cubic feet of gas, up from 1.6 trillion estimated in 2003.
Oil and Gas
Around the country, and in Colorado, houses, schools and shopping centers are being built on old oil and gas fields.
As lawmakers start the 2016 session, Colorado's governor lays out his biggest priorities, and faces questions about promises made last year.
Methane is a target for regulators and scientists because of its power to warm the planet.
- The task force has already received public feedback at meetings in Denver, Brighton, Broomfield and Rifle.Read more