News

On March 15, crews holed through to connect the downstream and upstream portions of the inlet/outlet tunnel.

Site experts give us an inside look at key components of project construction, including the valve house, tunnel, main dam and aggregate processing.

Stantec Principal Engineering Geologist Don Riley serves as the foundation grouting lead for the Chimney Hollow Reservoir Project.

The mystery staircase is a staff gauge. When the reservoir is complete, it will be used to provide a quick visual reference of the water surface elevation.

The Chimney Hollow valve house at the downstream toe of the main dam is well underway.

At Chimney Hollow, the success of the project relies heavily on a variety of jobs held by women, including engineers, foremen, haul truck drivers, inspectors and administrative staff.

One of the biggest milestones to date at Chimney Hollow Reservoir took place this winter, as the final pour of about 10,800 cubic yards of concrete was placed on the 3,700-foot-long plinth.

Twenty-five years ago, readers of the print version of Waternews saw a new idea appear in its pages: The proposal for a new channel to divert water around Windy Gap Reservoir.

The City and County of Broomfield is the largest participant in the Chimney Hollow Reservoir Project with almost one-third of the available storage, or 26,464 acre-feet.