Challenges arise with any project of this magnitude. Pipelines cross 30 parcels of land, requiring approval from property owners for construction. CDM Smith and the city partnered to mitigate delays in receiving land access, which sometimes required resequencing custom-manufactured pipes and reorganizing crew efforts.
Groundwater was close to the land surface, so the team needed to dewater pipeline trenches—at a rate of up to 2 million gallons per day. Faced with limited disposal options, CDM Smith successfully negotiated permitting with state agencies to safely discharge the water on land. “CDM Smith helped us out—their professionalism and attention to detail has been outstanding,” notes Granberg.
The team constructed seven microtunnels to push pipes under delta boating channels, roads and a railroad—an impressive number for one project. Throughout the process, the CDM Smith team tailored design elements to meet the project's technical needs and budget.
Green, Local, Responsible
CDM Smith and Stockton committed to successful project delivery, and to being environmentally and socially responsible. The project incorporated sustainable building practices, particularly in the water treatment plant’s administration and operations building, which was designed to achieve LEED® Silver certification. Photovoltaic solar panels on the parking area’s carport surfaces will provide more than half the building’s power. Additional green features include reclaimed water and micro-irrigation systems for a 50-percent reduction in water consumption, ozone-safe heating and air conditioning systems, and recycled construction materials.
A significant effort was made to hire local subcontractors and bring as much value to the community as possible. At the peak of construction, 140 onsite jobs were created. In addition, 45 percent of the project cost consisted of local materials, suppliers and vendors—a number that jumps to 65 percent when items unavailable locally are not considered.