Fish

U.S. Bureau of Reclamation

A new study says endangered razorback suckers upstream of Lake Powell may struggle to migrate up the San Juan River to spawn. The fish are blocked by a waterfall that formed two decades ago when the river changed its course. KNAU’s Melissa Sevigny reports. 


U.S. Geological Survey

The Colorado River that runs through Grand Canyon National Park supplies water to nearly forty million people in the West. But longstanding programs to protect the river’s health are about to be defunded by the federal government. River managers say the result could be disastrous for the crown jewel of the national parks. KNAU’s Melissa Sevigny reports.


USGS

This weekend, managers at Glen Canyon Dam will begin a first-of-its-kind experiment to release water that benefits bugs, which play a vital role in the Colorado River ecosystem. KNAU’s Melissa Sevigny reports.


George Andrejko, AZGFD

The U.S. Fish and Wildlife Service says a fish native to the Colorado River is no longer in immediate danger of extinction. KNAU’s Melissa Sevigny reports the humpback chub will be reclassified as “threatened” instead of “endangered.”


Melissa Sevigny

An environmental group in Utah wants to drain Lake Powell and move its water downstream to Lake Mead. Supporters say the plan will save water and restore a natural ecosystem in Glen Canyon. KNAU’s Melissa Sevigny reports.


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