Maine could be the proving ground of a significant new renewable powerhouse for the Northeast, as scientists and builders use composites and robotics in hopes of harnessing wind and wave power. + Image Rendering: Courtesty of NREL/Walt Musial Cianbro Corp., Pittsfield, Maine, is constructing a new $30-million Offshore Wind Laboratory, scheduled for completion in June. It has 4-ft-thick test floors with a waterproof blade-tip pit, 30 ft wide x 75 ft long x 16 ft deep, to be used as a wave basin for testing models of floating wind turbines. “It’s challenging keeping up with constantly evolving equipment technology,” says

Hundreds of roofs in the Northeast collapsed after a series of winter storms swept through the region from just before Christmas until the week after Groundhog Day, with minimal thawing in between. The accumulated loads proved more than many commercial flat-roof systems could handle. Photo: Courtesy Town Of Nottingham, N.H. Roof of Nottingham, N.H., town garage proved no match for series of winter storms. Injuries were minimal, but as the tally of structural failures mounted, some began to wonder whether it is time to re-examine building codes if the region is entering a climate-change cycle that will trigger increased precipitation

While a demolition contractor clears debris and stabilizes the site of what the owner claimed was the largest sloped green roof in North America, a forensics team is investigating why the structure suddenly collapsed on the afternoon of Feb. 13. Photo: Courtesy Aquascape Freeze-thaw cycle following major snowfall apparently triggered collapse of large green roof near Chicago. Related Links: Ice, Snow Take Toll on Northeast Roofs, But Engineers Say Codes Are Adequate The 700-ft by 50-ft area of roof that collapsed was attached to a warehouse. There were no injuries or inventory damage, said Ed Beaulieu, vice president at Aquascape,

The 130-turbine Cape Wind project off the coast of Massachusetts has spurred more support for offshore wind generation, including a $199-million terminal construction at the Port of Paulsboro, N.J., and a $35-million project on the waterfront in New Bedford, Mass. That new port infrastructure as well as recently announced federal programs to support offshore wind infrastructure may finally help launch the U.S. offshore wind industry, which has lagged behind countries such as the United Kingdom and Denmark where the offshore supply chain was developed years ago. New Bedford is Cape Wind’s designated hub for offshore wind staging and assembly. Kristin

A Nottingham, N.H., public works employee was gassing up his truck when he heard a noise and suddenly the roof of the town’s highway maintenance garage collapsed.

As the Federal Railroad Administration pursues regulations regarding inspection of concrete railroad ties, the Massachusetts Bay Transportation Authority last month launched a $91-million project to replace 147,000 concrete ties that began failing in just 10 years. Photo: Courtesy VHB Thousands of precast concrete ties began to fail in just 10 years. In 1997, the MBTA chose concrete over timber ties because Rocla Concrete Tie Inc., a Denver-based precast-concrete manufacturer, claimed they had a 50-year life span compared to 30 years for timber ties. But in 2007, several thousand ties began cracking and crumbling, disrupting train service on the 61-mile Old

Despite improperly placed concrete and a software design issue, the Rhode Island Dept. of Transportation and its contractor are anticipating that construction of the new $163.7-million Sakonnet River Bridge will stay on budget and on schedule. Photo: Courtesy RIDOT Contractor is repairing errors in concrete pours and girder design. The Sakonnet Bridge, a 2,065-ft steel-truss bridge, carries nearly 40,000 cars per day on Routes 24 and 138 between Portsmouth and Tiverton in eastern Rhode Island. Weight limits have been reduced to 18 tons, which leaves out large trucks. Construction of the replacement, a steel-tub-girder design, began in 2009, with completion