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ENR April 19, 2010
ENR, April 19, 2010
Cover Story: Equipment

Next Round of Federal Regulations Has Suppliers Retooling Clean Diesel

The next round of regulations covering airborne emissions for offroad diesel engines takes effect in nine months. Tier 4 rules promise improved health for millions of people, but there will be a price tag.


By the end of April, a joint venture called Audubon Bridge Constructors plans to begin pulling cable on the John James Audubon Bridge at St. Francisville, La., the longest cable-stayed bridge in North America. The JV has been on the project since April 2006, contending with a vast, wet site and water levels that vary as much as 40 ft. The bridge is expected to be completed in mid-2011.


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