Drew Smith, a hydraulic engineer with the Army Corps of Engineers, wouldn't speculate on the specific cause of Sunday's crash, which is under investigation by the Coast Guard.

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"You'd have to make a 20-point turn to get a truck in, " said Martin Dougherty, an engineer overseeing the project for the Army Corps.

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He joined the Corps of Royal Engineers in 2001 and was posted to 36 Engineer Regiment a year later.

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