Connecting our clients and colleagues with our people and projects. Published quarterly, OnSite spotlights our current work and company news.
Among the first tunnel projects in the United States to use the progressive design-build model, the Silicon Valley Clean Water (SVCW) Gravity Pipeline Project achieved substantial completion this spring. After five years and 3.3 miles of tunneling, the new gravity pipeline is ready to accept wastewater flow from the San Francisco Bay Area and convey it to Owner SVCW’s wastewater treatment plant in Redwood Shores, California.
After a seven-year phased program to remediate internal erosion, the Tennessee Valley Authority (TVA) reopened Boone Dam’s public recreation area just ahead of Memorial Day Weekend for the first time since 2014, when the dam was closed for emergency repairs. This spring, Barnard restored the crest of Boone Dam to its previous elevation and built a concrete floodwall. This work marked the final component of the Boone Dam Internal Erosion Remediation Program, the largest dam safety modification project in TVA’s history.
As part of Northern Water’s Windy Gap Firming Project, Chimney Hollow Reservoir will improve the reliability of the existing Windy Gap Project. The Windy Gap Project has been delivering water since 1985 through a diversion dam on the Colorado River, a 445-acre-foot reservoir, a pumping plant, and a pipeline from Lake Granby. With a changing climate and growing population, the region will benefit from Chimney Hollow’s water supply during dry years. The reservoir will enable Northern Water to store up to 90,000 acre-feet of water, with an annual yield of 30,000-acre feet.