Related Links: Record-Size Swimming Pools Come to the U.S. for the First Time A Closer Look at Record-Sized Pools That Resemble Oases The aquarium business "is dependent on the engineering challenges of containing water and resisting corrosion of materials; longevity; and low maintenance,” says Peter Chermayeff, an architect who has been designing major aquariums around the world for over 50 years.Aquariums—for which ENR has compiled a list at left of the world's largest—are typically built by general contractors with experience in the water and wastewater sectors. One example is Brasfield & Gorrie. The contractor's first fish habitat was Atlanta's Georgia
Allen Soast, 78, whose coverage of building and infrastructure construction took him to many global locations in a 35-year editorial career, died on March 18 of cancer in Hillsborough, N.J., says his family.
Roller-compacted concrete dams have steadily taken their place in the menu of possible dam types over the past four decades, with over 650 of them completed or under construction, according to HydroWorld magazine. China is far and away the leading RCC dam builder, with 165 as of 2012; of those, 40 are higher than 100 meters. Japan, the United States, Brazil and Spain are the other most prolific RCC dambuilders.Roller-compacted concrete dams evolved in the 1970s to satisfy a particular need by dambuilders and owners. The percentage of dams built with concrete dropped steadily between 1950 and the late 1970s,
Related Links: Precast Concrete Network Arch Bridge Is A First Unusually Slender Arch Marks Prague Bridge Arch bridges are one of the oldest types of bridges. The oldest known bridge in the world known to still be in use is the Caravan Bridge, a stone arch bridge across the Meles River in Izmir, Turkey. It was built in 850 B.C.Roman engineers built many arch bridges, quite a few of which are still standing. Probably the most famous is the Pont du Gard, an aqueduct bridge in southern France. Built in the first century A.D., it features three tiers of limestone
The projects we profile in this special section all stretch the limits of what is possible. At first glance, they may seem impossible to build. some of the projects are technically possible to build but may be economically unfeasible.
Metro systems are vital circulatory systems for moving large numbers of residents, commuters and tourists around large cities. Metros are mass-transit systems that are generally heavy rail lines that operate on their own rights-of-way, whether underground, at grade or on elevated viaducts. They are distinct from light-rail and commuter rail networks.According to the International Association of Public Transport (UITP), the world's 148 metro systems carry, every day, more than 150 million passengers on 540 lines over 11,000 kilometers to and from 9,000 stations.Since the earliest metro systems were built more than 100 years ago, there have been many advances in
Map by Jeffrey Cox/ENR Rail Baltica will extend European standard gauge through the Baltic states. Related Links: For Panamax Port Expansions, The Freight Wait is Almost Over Saudi Arabia Upgrading Rail Passenger and Freight Service Lithuania, Latvia and Estonia are aiming to take their railway destinies more firmly in hand through Rail Baltica, a multinational effort to improve freight rail connectivity between Central and Northern Europe. Running from the port of Tallinn, Estonia, south through Latvia and Lithuania, the high-speed, standard-gauge line will connect with Warsaw, Poland, and ultimately, Berlin.Construction of Baltica 1, the first 115-kilometer segment between the Polish-Lithuania