In late July, four 1,200-ton, 165-ft-long steel segments were erected to become a tower for the $6-billion San Francisco-Oakland Bay Bridge’s self-anchored suspension span. Photo Courtesy Of Caltrans Steel tower legs are lifted into place for the San Francisco-Oakland Bay Bridge’s self-anchored suspension span. Under a $1.43-billion contract, the joint venture of American Bridge, Coraopolis, Pa., and Fluor Corp., Irving, Tex., used a strand-jack gantry positioned atop the erection tower to pull the segments off a barge, lift them straight up over the tower foundation, then lower them into place. The first four tower sections, fabricated by ZPMC in Shanghai,

Verdant Power Inc., the leading U.S. tidal power developer, and the China Energy Conservation and Environmental Protection Group (CECEP), a renewable energy company, have signed a memorandum of understanding to develop tidal energy projects in China. The agreement is the first of its kind between China and the U.S. involving marine and hydrokinetic power projects. According to Trey Taylor, president of Verdant Power, the two firms have identified potential sites and are currently gathering data at those locations. The Generation-5 turbines they plan to use in China, says Taylor, “will be demonstrated at pilot project sites in North America as

China has installed the first major offshore wind farm outside of Europe. + Image In China, most offshore wind farms likely will be built in intertidal areas. Located in the East China Sea, near Shanghai, the 102-MW Donghai Bridge Wind Farm began transmitting power to the national grid in July. The farm, which is slated to expand in the coming years, eventually will generate annually 267 million kilowatt-hours of electricity—enough to power 200,000 Shanghai households. It currently is supplying power to the Shanghai Expo and serving as a showcase project at the five-month-long international event. The $337-million Donghai Bridge farm

Work has begun on a $700-million ferronickel plant in eastern Cuba, near Moa, that is slated for completion in 2013. The Las Camariocas plant is the largest construction project now under way in the island nation. It has been undertaken by Quality Cuba S.A., a joint-venture contractor comprising Cuba’s state-owned engineering and construction firm, Quality Couriers International S.E.A., and the government of Venezuela. Upon completion, the plant is expected to annually produce 68,000 tons of ferronickel, which is an ingredient in stainless steel. Quality Cuba S.A. also is partnering with Brazil’s Odebrect to build a $600-million container terminal at the

The U.S. Army Corps of Engineers gave final approval July 27 to Central Maine Power, a subsidiary of the Spanish-owned company Iberdrola USA, to begin work on a $1.4-billion electricity transmission network, one of the largest construction projects in Maine’s history. The project includes five, 345-kV substations linked by 450 miles of new or rebuilt transmission line. The line’s southern end will tie into the New England grid near the New Hampshire border and its northern end will link with Canadian transmission lines in Orrington, Maine. The utility has contracted with Maine contractors Cianbro Corp., Pittsfield, and RJ Grondin &

More than any other European nation, the U.K. is pinning its hopes for a low-carbon-electricity future on offshore wind power. It already has more offshore generation than any other nation, at over 1,000 MW. But with construction costs posing the major hurdle to reach the U.K.’s goal of generating 12,000 MW by 2020, the quest is on for the best foundations in ever-deeper waters. Because of supply bottlenecks and other factors, the real construction cost of offshore wind farms has risen 20% since the first commercial schemes were built seven years ago, says Rob Hastings, head of marine resources at

Aiming to cut costs of offshore wind power, British engineers are developing a vertical-axis turbine that would eliminate the need for a tower, reduce stress on blades and foundations and ease installation work. The developer of the 10-MW device hopes to have a 1-MW proof-of-concept machine at work within two years. A full-scale demonstration would follow. Photo Courtesy Wind Power Ltd./Grimshaw In the vertical-axis concept, blades spin close to the ocean surface, like a fan on its back. The device has two rotors attached to inclined arms. These arms rise from a vertical axle in a module sitting just above

An inflatable dam in downtown Tempe, Ariz., burst on July 20, emptying most of the contents of the 1-billion-gal Tempe Town Lake. No one was injured and no property was damaged in the resulting flood, which traveled down the normally dry Salt River through Phoenix. Peak flows were measured at 15,000 cu ft per second, equivalent to an average release during the area’s winter rainy season. Photo: Tony Blei Photography Eight rubber-coated fabric bladders retained 1 billion gal of water in Tempe. The two-mile lake was formed in 1999 using eight flexible, rubber-coated fabric tubes manufactured by Tokyo-based Bridgestone Industrial

Officials in northeastern Iowa are cleaning up in the aftermath of a July 24 dam failure, and early analysis indicates an earthen berm next to a section with concrete spillways was overtopped and eroded away when the rain-swollen, 9-mile-long Lake Delhi overwhelmed it. Photo: AP/WideWorld Earthen berm by spillway was overtopped and eroded. “It appears at this point that there was just a lot more water than the dam was designed for,” says Lori McDaniel, supervisor of floodplain management and dam safety programs for the Iowa Dept. of Natural Resources. Further, she says the concrete spillway next to the berm

The historic Boston University bridge is receiving a sorely needed $20-million total body makeover while still remaining open to a steady stream of cars, cyclists and pedestrians. Crossing over the Charles River, the 80-year-old Boston-Cambridge link, which provides spectacular views of Boston’s skyline, had aged to the point where the sidewalks were crumbling, the railing had rusted, and concrete was spalling. The old drainage system was so corroded that stormwater went through the bridge and into the river. The project received a boost from 2008 Massachusetts legislation that created the $3-billion, eight-year Accelerated Bridge Program. Pihl Inc., the U.S. branch