Northern Water will further delay an initial partial filling of its new Chimney Hollow reservoir into next year to allow time for expanded groundwater tests in the area to make sure unexpected uranium leaching inside the planned pool would not migrate to other supplies. … Filling of a small portion of the reservoir had been planned for this month, but now is “expected in early 2026,” according to the agency. … The project was meant to “firm” or store water rights Northern Water owns in the Windy Gap project near Granby, which collects and pumps Colorado River water into the Adams Tunnel for Front Range buyers. 

Other Colorado River Basin infrastructure news:

• WBUR (Boston, Mass.): ‘It’s a very unique job:’ Scottish dam keeper watches over Arizona reservoir