News

Custom-built asphalt machine at the testing site at Chimney Hollow Reservoir.

Hydraulic Asphalt Concrete Testing Gets Underway at Chimney Hollow

Construction crews placed a hydraulic asphalt concrete test strip, which will allow our team to closely examine the material that will be used to build the critical HAC core of the main dam.

Multiple 40-foot sections of the Chimney Hollow Conduit sit waiting for installation.

First Chimney Hollow Pipe Arrives On-Site

The first pipe delivery for the Chimney Hollow Conduit arrived on June 27.

Tunnel excavation about 200 feet in.

Tunnel Blasting Operations Move Earlier Beginning July 18

We continue to mitigate noise and impacts for the Chimney Hollow neighbors. Beginning Monday, July 18, tunnel blasting will move to a 7 a.m. to 9 a.m. window.

Overhead shot of quarry development in June 2022.

On-Site Quarry Blasting and Aggregate Processing Continues

To maintain the project’s timeline, quarry crews will soon begin working double shifts to produce and place rock on the main dam embankment.

Looking at downstream portal of the tunnel, May 2022.

Tunnel Blasting Operational Changes Improve Mitigation

Barnard and the Municipal Subdistrict recently made significant changes to blasting operations to further mitigate noise and impacts to the Chimney Hollow community.

Northern Water employee Dan Falcon.

Employee Spotlight: Dan Falcon

Dan Falcon plays an integral role in the construction of Chimney Hollow as a Lead Quality Assurance Inspector.

Concrete Plinth About 30 Percent Complete

Progress on the concrete plinth of the main dam in recent months has made the 18-inch-thick, 36-foot-wide slab one of the most prominent fixtures of the Chimney Hollow Reservoir construction site.

72-inch butterfly valve.

There’s More to Chimney Hollow Than Meets the Eye

There are a lot of exciting features to be seen at the Chimney Hollow construction site. However, some of the most critical components of the project are hidden from the eye.

Chimney Hollow Reservoir logo with valley in background.

Double Shifts Begin for Construction Crews

On June 5, 2022, crews started working double shifts (two 10-hour shifts) in the tunnel, which will ensure progress continues to stay on schedule.