Northeastern Colorado is fast becoming the site of one of the country’s next big oil booms as new technologies surrounding hydraulic fracturing are allowing companies to get a piece of the Niobrara Shale. Previously deemed too expensive to drill, the Niobrara formation that extends from beneath Denver all the way to western Nebraska is thought to hold more than a billion barrels of oil. The only trouble is much of the land atop it is home to one of the country’s fastest growing regions.