Little Boat, Big Impact
By Luke Carothers
Along the Texas Gulf Coast , the construction and expansion of ports is a continually-active process. As one of the busiest corridors in the world for shipping, ports along the Texas Gulf Coast are actively working to update infrastructure and facilities to support a massive flow of traffic. McCarthy Building Companies has worked with a number of ports along the Texas Gulf Coast to do just this. McCarthy has continually worked with Port Houston for 30 years, and is currently undertaking projects for Port Freeport as well as demolishing and constructing a strategically important dock for Port Beaumont. Over their decades in working with ports along the Texas Gulf Coast, McCarthy has been in a constant state of innovation in construction, and has developed technologies that help make projects safer while saving time and money. Their most recent development in this regard is certainly lacking in size, but that hasn’t stopped it from making a big impact on projects in the short time it has been deployed. McCarthy has recently started using a five-foot-long by three-foot-wide unpiloted survey vessel (USV) to assist with their port projects. Using sonar technology, the USV collects data on the seafloor and finds obstructions within the work area. The USV is also equipped with a sound velocity probe that reports the density, salinity, temperature, and conductivity of the water—all of which impact how fast sound waves travel through water, making data it collects more accurate. Sarah Johnson, senior field engineer for McCarthy’s Marine Business Unit, says that the deciding factor for obtaining the USV was their project at the Port of Beaumont. In 2012, a wharf at the port failed due to an issue with the corrosion of steel piles. As such, a large part of McCarthy’s work at the Port of Beaumont has been demolishing the failed piles and concrete structures then subsequently installing new piles that will resist corrosion. Much of this demolition work is underwater, which is complicated by incredibly murky water that
affords at most six inches of visibility. With the complications of access and visibility impairing safety and slowing progress, McCarthy’s team turned to the USV. Prior to deploying the USV at the Port of Beaumont, divers on the project faced significant challenges and dangers from lack of visibility. According to Adeel Malik, vice president of estimating for McCarthy’s Marine Business Unit, the decision to use the USV at the Port of Beaumont stemmed from a need to map out the collapsed structure that lies beneath the water, adding that the decision to do so has had a significant impact from a safety perspective. The USV utilizes sonar
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csengineermag.com
June 2023
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