The Big Dig was a megaproject in Boston that rerouted the then elevated Central Artery of Interstate 93 that cut across Boston into the O'Neill Tunnel and built the Ted Williams Tunnel to extend Interstate 90 to Logan International Airport. Those two projects were the origin of the official name, the Central Artery/Tunnel Project. Additionally, the project constructed the Zakim Bunker Hill Bridge over the Charles River, created the Rose Kennedy Greenway in the space vacated by the previous I-93 elevated roadway, and funded more than a dozen projects to improve the region's public transportation system. Planning for the project began in 1982; the construction work was carried out between 1991 and 2006; and the project concluded on December 31, 2007. The project's general contractor was Bechtel and Parsons Brinckerhoff was the engineer, who worked as a consortium, both overseen by the Massachusetts Highway Department.
Skanska AB is a multinational construction and development company based in Sweden. Skanska is the fifth-largest construction company in the world according to Construction Global magazine. Notable Skanska projects include renovation of the United Nations Headquarters, the World Trade Center Transportation Hub project, Moynihan Train Hall, 30 St Mary Axe, MetLife Stadium, Mater Dei Hospital, among others.
Modern Continental was a construction company based in Cambridge, Massachusetts, which was involved in the Boston "Big Dig" Central Artery/Tunnel Project. On June 23, 2008, the company filed for Chapter 11 bankruptcy in federal court in Boston.
STRABAG SE is an Austrian construction company based in Spittal an der Drau, Austria, with its headquarters in Vienna. It is the largest construction company in Austria and one of the largest construction companies in Europe. The company is active in its home markets Austria and Germany and in all countries of Central, Eastern and South-East Europe, in selected markets in Western Europe, on the Arabian Peninsula, as well as in Canada, Chile, China and India. In these markets STRABAG has subsidiaries or operates on a project-basis.
The Fort McHenry Tunnel is a four-tube, bi-directional tunnel that carries traffic on Interstate 95 (I-95) underneath the Baltimore Harbor. Named for nearby Fort McHenry, the tunnel is the lowest point in the Interstate Highway System under water.
Obayashi Corporation is one of five major Japanese construction companies along with Shimizu Corporation, Takenaka Corporation, Kajima Corporation, and Taisei Corporation. It is listed on the Tokyo Stock Exchange and is one of the Nikkei 225 corporations. Its headquarters are in Minato, Tokyo. In 2018, Obayashi was ranked 15th place on ENR's list of Top 250 Global Contractors, the highest rank among Japanese Contractors.
WSP USA, formerly Parsons Brinckerhoff, is an American multinational engineering and design firm. The firm operates in the fields of strategic consulting, planning, engineering, construction management, energy, infrastructure and community planning. It is a subsidiary of WSP Global.
Hatch is a global multidisciplinary management, engineering and development consultancy. Its group companies have more than 10,000 staff in 70+ offices. In 2015, Hatch was ranked as a top 20 International Design Firm according to the Engineering News-Record (ENR) rankings.
HNTB Corporation is an American infrastructure design firm. Founded in 1914 in Kansas City, Missouri, HNTB began with the partnership made by Ernest Emmanuel Howard with the firm Waddell & Harrington, founded in 1907.
Consolidated Contractors Company (CCC) is the largest construction company in the Middle East and ranks among the top 25 international contractors with a revenue of US$5.3 billion in 2013 and 1.872 billion by 2020. CCC has offices and projects in over 40 countries, and in 2033 had a workforce of 36,000 employees. In April 2019, CCC was engaged in 40 ongoing projects globally. The majority of its sales are in the Middle East.
ACS, Actividades de Construcción y Servicios, S.A. is a Spanish company dedicated to civil engineering, construction, all types of services and telecommunications. It is one of the leading construction companies in the world, with projects in many countries around the world. The company was founded in 1997 through the merger of OCP Construcciones, S.A. and Ginés Navarro Construcciones, S.A. The group has a presence in the United States, Germany, India, Brazil, Chile, Morocco and Australia. The headquarters are in Madrid and the chairperson is Florentino Pérez. Listed on the Bolsa de Madrid, the company's shares form part of the IBEX 35 stock market index.
The Big Dig ceiling collapse occurred on July 10, 2006, when a concrete ceiling panel and debris weighing 26 short tons and measuring 20 by 40 feet fell in Boston's Fort Point Channel Tunnel. The panel fell on a car traveling on the two-lane ramp connecting northbound I-93 to eastbound I-90 in South Boston, killing a passenger and injuring the driver. Investigation and repair of the collapse caused a section of the Big Dig project to be closed for almost a full year, causing chronic traffic backups.
The Perpignan–Barcelona high-speed line is an international high-speed rail line between Perpignan in Roussillon, France and Barcelona, Spain. The line consists of a 175.5-kilometre (109.1 mi) railway, of which 24.6 km (15.3 mi) are in France and 150.8 km (93.7 mi) are in Spain. The line is sometimes referenced as an extension of the Madrid–Barcelona high-speed rail line. The Perpignan–Barcelona line is a part of the Mediterranean Corridor.
The Perthus Tunnel is a twin-bore railway tunnel between France and Spain under the Eastern Pyrenees, built as part of the high-speed railway line Perpignan-Figueres. It has made possible the implementation of direct high-speed trains connecting the two countries' railway systems since December 2013, linking the Spanish AVE network with the French TGV. The tunnel is named after the nearby border town of Le Perthus.
Michels Corporation is a family-owned and operated energy and infrastructure construction company headquartered in Brownsville, WI. Established in 1959, Michels Corporation ranks #27th out of 400 top contractors in North America, performing work throughout the world.
Flatiron Construction Corporation, a subsidiary of Hochtief, is a heavy civil infrastructure contractor headquartered in Broomfield, Colorado in the United States.
The Fore River Bridge spans the Weymouth Fore River between Quincy and Weymouth, Massachusetts. The total length of the bridge including the approaches is 2,216 feet (675 m).
Gilbane, Inc. (Gilbane) is a national construction and real estate development company based in Providence, Rhode Island. It is the parent organization of Gilbane Building Company and Gilbane Development Company. Gilbane, Inc. is a sixth-generation, family-owned business.
London Power Tunnels is a project by National Grid to reinforce the electricity transmission network in London, UK, by constructing more than 60 km of new deep-level tunnels carrying high-voltage cables.
The Northolt Tunnel is a high-speed railway tunnel currently under construction in Greater London, England, and will upon completion carry the High Speed 2 (HS2) railway line under the West London suburbs. The twin-bore tunnels will run for 8.4 miles (13.5 km) between Old Oak Common and Ruislip. As of March 2024, the first tunnel boring machine has completed 50% of its bore length.
