Project Description

In side slope failure, due to saturated Levee slope from heavy rains, leaving a 10’ wide water side portion of Levee standing against an already high water elevation and heavy flows due to extreme run off. Dutra was call for an immediate emergency response to rebuild the Levee section before it failed and created a breach in the Levee, flooding the Island and parts of Walnut Grove.

Major Challenges

This project was unique compared to other projects in the fact that it was an immediate response emergency call out to save the Levee section, prevent a Levee breach and to provide safety to the public and homes in the area. The Dutra Group was called by the District Engineer on 2/13/2017 at 1000 hrs. The Dutra Group had a Crane barge, loaded rock barge with tug on site placing rock as directed by 1130 hrs. the same day.

Also, there was mobilized within 2 hrs., assist equipment, 2 dozers, 416 back hoe, 84” pad foot compactor, porta potties, and light plants with supervisors and employees to operate at a 24-hr. basis. The Derrick Barge 24 was also mobilized out of Dutra Rio Vista facility to assist. Under direction of the district there was placed 9,024 tons of rock product placed brought from Dutra’s San Rafael Rock Quarry by barge and tug 65 Nautical Miles away.

In addition, with that 8,182 tons of fill was placed and brought by barge and tug from Decker Island 20 nautical Miles away. 2 tug boats were used on project and coordinated with Caltrans and the Mokelumne River bridge openings.

Project was completed on 2/16/2017 4 days later with no safety incidents.

Project Description

Place Drain Rock at land side toe of levee as ballast to prevent slope slippage.

Major Challenges

Marina located at job site prevented direct placement by barge.

Project Scope

To off load 5,400 ton of Drain rock by barge into 10 wheel dump trucks, haul to job site 1 mile away and place as per lines and grades with dozer. Place stabilization fabric and to install water lines.

Project Description

Suuyvesant Dredging and Pump-Off in one continuous operation (24/7). The Headland Work Area extends from Latitude 29º 07′ 35″N, Longitude 90º 09′ 11″W to Latitude 29º 11′ 16″N, Longitude 90º 03′ 10″W.

The beach and dune fill sediments will be mined from a borrow area located on Ship Shoal within the Bureau of Ocean Energy Management (BOEM) Offshore Continental Shelf (OCS) Lease Blocks South Pelto 13 and 14, approximately 30 nautical miles (NM) southwesterly from the Work Area.

The borrow area is centered at Latitude 28º 54′ 47″N, Longitude 90º 37′ 12″W.

Environmental Restrictions and Monitoring required.

Project Description

Project consists generally of on-call dredging at the Port of San Francisco, including mobilization and demobilization, hydrographic surveying, dredging, dredge material transportation for in-Bay disposal, ocean disposal to beneficial reuse sites, and crane lifting services, all as set forth in the construction contract documents.

Project Description

The Canaveral Port Authority has contracted Dutra Dredging to widen and deepen the main channel at Port Canaveral, Florida. The work consists of dredging approximately 3 million cubic yards of material with disposal in an offshore site.

Dutra recently mobilized the Derrick Barge Paula Lee and two split-hull dump scows, the 5000 cubic yard CK7 and 3000 cubic yard DS6 from their home base in San Rafael, California, to the job site via the Panama Canal. Work began in May 2014.

This contract marks a return to East Coast clamshell dredging for The Dutra Group after a period of focusing operations on the West Coast. Management and the project staff look forward to a successful 2015 completion.

Project Description

Dutra once again is part of the replacement of The San Francisco Oakland Bay Bridge Eastern Span, a bridge that serves as a vital link between San Francisco and the East Bay. The bridge replacement is the largest public works project in California history.

Seventeen years later the American Bridge/Fluor Joint Venture was awarded the contract for constructing a segment of the new eastern span, the Self Anchored Suspension (SAS) Span. The Self Anchored Suspension Span is the longest single-tower self- anchored suspension bridge in the world. Dutra contracted with American Bridge/Fluor to construct the temporary foundations for supporting the installation of the bridge superstructure and more recently to install the fender system around the base of the pier that supports the main tower.

The fender system design required the installation of sixteen precast concrete segments around the base of the pier, each segment weighing up to 360,000 pounds. The fender segments were cast in Dutra’s Alameda waterside facility, loaded onto barges, and transported to site for installation. Onsite, Dutra first installed steel falsework around the pier to temporarily support the precast segments. Then Dutra’s heavy lift Derrick Barge Paula Lee was used to set them into position. The installation required detailed planning due to the weight of the precast segments in combination with the limited clearance underneath the new bridge. Once the segments were in position a cast in place concrete closure pour was made connecting the precast to the existing pier followed by the removal of the falsework.

Project Description

Brannan Street Wharf is a new public park located in the center of the emerging South Beach waterfront in the Port of San Francisco. The wharf was constructed over water and is supported by 220 piles. The cast-in-place deck is 57,000 square feet. It provides a 400 foot long lawn area, a waterside walkway with seating, and a shade structure for the public.

Major Challenges

The site is located in a high traffic urban area on the San Francisco Embarcadero, with pedestrians, streetcars, automobile traffic, and restaurants requiring traffic control. To minimize intrusion Dutra mobilized all large equipment and materials by water. Port traffic included the America Cup’s active wharf adjacent to the project, and cruise ship traffic. Construction adjacent to existing seawall and other structures required careful construction measures and monitoring. This included the use of a bubble curtain during pile driving operations.

Project Scope

• Repaired and strengthened 1,000 feet concrete bulkhead seawall.
• Removed 8,200 square feet and 84 supporting piles of existing bulkhead wharf.
• Constructed 57,000 square foot of cast-inplace decking.
• Constructed a 23,500 square foot raised lawn area.
• Reconstructed a 4,400 square foot addition to Embarcadero promenade.
• Pile driving – 220 new piles