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Engineering News-Record has published its annual list of the Top 400 contractors in the country, and six Utah-based commercial construction companies were included.

Layton Construction was listed as the 85th-largest commercial contractor in the country and the largest in Utah.

Also on the list were Okland Construction (No. 90), Big D Construction (No. 99), Jacobsen Construction (No. 145), R&O Construction (No. 194) and Clyde Companies (No. 197).

The rankings were based on 2011 construction revenue reported by the companies to ENR.

In 2010, ENR senior editor Gary Tulacz said the recession continued to plague large contractors in the U.S., with about two-thirds of that year's Top 400 companies reporting a falloff in revenue from 2009.

But he said 2011's numbers show an improvement over the previous year.

"The slow turnaround in the construction market can be seen in this year's list," he said, noting that as a group, those companies generated an 8.8 percent increase in revenue from 2010.