… [I]t sounded like a waterfall suddenly roared to life as Northern Water started filling Colorado’s newest reservoir, Chimney Hollow. … Engineers will make sure the pipes that will funnel Colorado River water to the reservoir are functioning correctly. It will also give Northern Water a chance to study an issue with the water supply. The reservoir’s future became murky last year after officials announced that naturally occurring uranium was found in the rock used to build the dam for the reservoir. … This week’s initial fill will provide Northern Water with a real-world test of the water quality that was only previously done in laboratories. None of the water coming into the reservoir will be released to taps at this point.

Other Chimney Hollow reservoir news:

• The Colorado Sun (Denver, Colo.): Northern Water starts filling Chimney Hollow, uranium questions still linger
• KUSA (Denver, Colo.): New northern Colorado reservoir filled with some water after uranium discovery
• CBS Colorado: Video: Chimney Hollow Reservoir fills with water in Northern Colorado dam project