Delta Division Highlight Archives - The Dutra Group

Tyler Island, California, Emergency Levee Repair

christine — Sun, 03 Dec 2017 20:32:59 +0000

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.

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Brannan Andrus, California, Levee Stability Berm

christine — Sat, 03 Dec 2016 20:30:15 +0000

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.

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Drought Emergency – Temporary Rock Barrier

christine — Thu, 01 Jan 2015 20:11:10 +0000

Project Description

Dutra installed a barrier made up of approximately 150,000 tons of embankment rock and 35,500 sf of sheet piles across the West False River between Jersey and Bradford islands. The barrier was to prevent saltwater from pushing with the tides into the central Sacramento- San Joaquin Delta from the San Francisco Bay.

With the drought in its fourth year, this was an essential part of the DWR’s strategy to maintain good water quality in the Delta, which provides water to 25 million Californians.

Major Challenges

Main challenge was to achieve full closure of False River in 45 days. Liquidated Damages if not completed were $15,000/ day. Actual closure took 23 days, with final placement of remaining rock in 28 days.

Challenges included working in the increasing currents of False River.

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