Wednesday's proposal affects conservation plans for grouse in Wyoming, Idaho, Nevada, Colorado, Utah, California and Oregon.
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Five environmental groups are seeking a court injunction to halt construction of hiking and biking trails at the Rocky Flats Wildlife Refuge.
Officials in Colorado, New Mexico, Wyoming and Utah, who accused the Central Arizona Project of manipulating the water at the expense of others.
Wolves and wolf-dogs born into captivity face a bleak future. The Mission: Wolf sanctuary gives them a home.
Lawsuits claim the Trump administration ignored policies meant to protect the greater sage grouse when it sold oil and gas leases in Montana, Wyoming, Utah and Nevada.
The so-called bug flows are part of a larger plan approved in late 2016 to manage operations at Glen Canyon Dam, which holds back Lake Powell.
John Fleck, director of the University of New Mexico Water Resources Program, says there are signs that years of work could be at risk.
Colorado is starting to stir awareness of the state's forthcoming wildfire season, which traditionally begins in May.
Two weeks after an Anadarko contribution, Protect Colorado spent $550,000 on signature gathering for the upcoming election.
Craig Fugate, who was just in Colorado, tells Colorado Matters why he was just in the state talking to various communities about preparedness.
Bite into a juicy heirloom tomato from a local farmers market and you could be chewing on a bit of history and cross cultural exchange.
Drillers are making money — even though prices have yet to get back to their peak.
The normal staid diplomacy of Colorado River managers was upended in a spat between Denver Water and the Central Arizona Project.
The biggest change came in February when regulators changed how flowlines are created, tested and eventually abandoned.