Project Size Portfolio

Project Size Portfolio

Sukut’s Dams and Reservoirs market group has completed projects in excess of one billion dollars. Sukut’s team follows a successful philosophy of putting the project first on every job. This approach is centered on ensuring a collaborative effort between all team members, jointly working toward successful project completion goals, and exceeding the expectations of all parties.

Lake Isabella Dam Safety Modification Project

Location: Lake Isabella, CA
Sukut entered into a three-year-long joint venture project with Flatiron and Dragados, directed by the U.S. Army Corps of Engineers. The major dam modification work will enhance the structural capability of the existing dam and restore the water storage capacity. With the formation of a new emergency spillway, the project requires more than 3.75 million cubic yards of excavation. The enhanced dam includes 56,000 cubic yards of concrete for a new 28-foot tall labyrinth weir. To achieve the planned additional 16 feet in height over the existing dam, the construction team is in the process of drilling, blasting, and crushing over 2.5 million cubic yards of granitic rock for additional buttressing and embankment.

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Trampas Canyon Dam and Reservoir

Location: South Orange County, CA
The Santa Margarita Water District contracted with Sukut to complete the renovation and reconstruction of a 50-year old dam and reservoir into the newer and larger Trampas Canyon Dam and Reservoir. The original dam was de-graded and reconstructed 40 feet taller and over 150 feet wider than the old dam. This was accomplished by Sukut excavating and placing more than 3.7 million cubic yards of zoned embankment material to buttress and re-build the new dam. The new 5,000 acre-foot capacity reservoir also required the import of 700,000 tons of granular filter drain materials along with 100,000 tons of riprap and bedding along with a host of instrumentation and control support features. The project also included the construction of a dam control building, dam electrical and instrumentation, emergency outlet structure, inlet/outlet structure, 400-foot-long concrete spillway with 15-foot-tall walls, a 315-foot-long boat launch ramp and stairs, boathouse, 700 feet of 63-inch microtunnel, four MSE walls, 22,000 feet of tubing for the reservoir aeration system, 9,100 feet of 16 and 30-inch CML&C waterline, 20,000 feet of perimeter fencing, and 6,800 feet of asphalt access roads.

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Calaveras Dam

Location: Fremont, CA
Sukut and our valued joint venture partners, Dragados USA and Flatiron, are constructing the Calaveras Dam Replacement Project for the San Francisco Public Utilities Commission. The project entails a full replacement of the 225’ high zoned earthen dam and partial demolition of the existing dam, originally built in 1925. This Risk Level three project includes approximately seven million cubic yards of earthwork with over 650 vertical feet of elevation change and several other components: a new outlet works shaft, tower and ADIT system, outlet works piping, mechanical encasements, deep soil mixing, a 45,000 cubic yard concrete spillway, retaining systems, rock reinforcement, foundation grouting and treatment, electrical, instrumentation, and road work to restore the dam to its original 31 billion gallon capacity.

The project collected various industry awards:

    • 2018 Outstanding Environmental and Engineering Geology Award from the Association of Environmental & Engineering Geologists
    • APWA Northern California Contractor of the Year
    • APWA Northern California Structures Projects over 75 Million Project of the year
    • USSD 2019 Construction Project of the Year
    • 2019 IPI Partnered Project of the Year Award

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