Kiewit consistently ranks as one of the country's top contractors in the delivery of water and wastewater projects, according to Engineering News-Record (ENR). The 2015 ENR Sourcebook rankings list Kiewit as the No. 1 contractor for dams & reservoirs and water supply categories, as well as No. 2 for water treatment desalination lines, No. 3 for water transmission lines and No. 4 for sanitary and storm sewers. Kiewit’s water/wastewater portfolio includes major roller-compacted concrete, earth-fill and rock-fill dams; reservoirs; water tunnels; and canals across North America, as well as transmission pipelines, aqueducts and water/wastewater treatment facilities. Over the past 10 years, Kiewit provided procurement, construction and/or start-up services for 400 water/wastewater projects totaling more than $6.5 billion in contract revenue.
As the primary water source for the Contra Costa Water District, the Los Vaqueros Dam measures 1,000 feet across and 192 feet high. During construction, project personnel suggested a value engineering concept that considered the creation of rip rap from on-site oversized rock from the excavation. This resulted in more than 50,000 cubic yards of rip rap generated on-site.
The Val Vista Transmission Main Rehabilitation and Replacement project, delivered in seven GMP’s, was the largest project of its kind in the United States., The project was developed to trenchlessly rehabilitate a critical piece of infrastructure that transports 220 MG of drinking water to as much as 60 percent of the population in Phoenix, Arizona. The project involved the rehabilitation of 30,000 feet of 96-inch to 72-inch prestressed concrete cylinder pipe by means of a split-can, steel slip lining.
This $61 million project involved the design and construction of a water transmission system. The success of the shutdown, tie-in, and restart was due to the project team's well planned coordination and communication with the local agencies and community.
Kiewit Pacific Co. was awarded an $18 million contract to rehabilitate 12 rectangular primary sedimentation tanks. Crews will replace grit slurry piping and grit overflow piping in grit handling areas as well as constructing related structural, mechanical and electrical work.
The $11 million project involved installing 7,000 linear feet of pipeline, a two-million-gallon concrete reservoir, a booster pump station, consisting of five vertical turbine pumps, water treatment facilities, a new arsenic treatment system and a well development. To increase the station's water distribution pressure, crews constructed each zone with three 100-horsepower and two 75-horsepower vertical turbine pumps with variable frequency drives, which extend down 37 feet into a header, supplied with water from the bottom of the reservoir.
Kiewit Pacific Co. constructed the world's largest prestressed concrete tanks. The $86 million Hollywood Hills Quality Improvement Project consisted of two 30-million-gallon underground water storage tanks and a 1-mi.-long tunnel bypass system to provide safe drinking water for nearly 500,000 customers in the Hollywood area.
Part of restoring the Everglades to an ecologically balanced condition by reducing levels of phosphorous in the water created from farmland storm water run-off, the $2.3 million project included installing a new intake and pump station in Palm Beach County, Fla. Due to the remote location in the Everglades, Gilbert Southern Corp. maintained an on-site office throughout construction.