A megaproject is an extremely large-scale investment project.A more general definition is "Megaprojects are temporary endeavours (i.e. projects) characterised by: large investment commitment, vast complexity (especially in organisational terms), and long-lasting impact on the economy, the environment, and society".Megaprojects may refer to construction projects but also decommissioning projects with multi-billion budgets, and a high level of innovation and complexity, affected by a number of techno-socio-economic and organizational challenges.
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👉 Megaproject in the context of Big Dig
The Big Dig was a megaproject in Boston that rerouted the elevated Central Artery of Interstate 93 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 (CA/T Project). The megaproject constructed the Zakim Bunker Hill Bridge over the Charles River, created the Rose Kennedy Greenway in the space vacated by the previous elevated roadway and funded more than a dozen projects to improve the region's public transportation system. Planning began in 1982 and construction was carried out between 1991 and 2006. The project concluded in December 2007.
The project's general contractor was Bechtel, with Parsons Brinckerhoff as the engineers, who worked as a consortium, both overseen by the Massachusetts Highway Department. The Big Dig was the most expensive highway project in the United States, and was plagued by cost overruns, delays, leaks, design flaws, accusations of poor execution and use of substandard materials, criminal charges and arrests, and the death of one motorist.
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Megaproject in the context of A2 motorway (Greece)
The A2 motorway, also known as the Egnatia Odos (Greek: Εγνατία Οδός), is a tolled controlled-access highway in northern Greece that runs from the western port of Igoumenitsa to the eastern Greek–Turkish border at Kipoi. The entire route is part of the Greek section of the E90 road, which runs from Lisbon, Portugal in the west, and Zakho, Iraq in the east.
The A2 motorway runs a total of 670 km (420 mi). The megaproject began in 1994 and was completed in 2009 at a cost of €5.93 billion ($8.27 billion); it was managed by the state-owned company Egnatia Odos, S.A.
Megaproject in the context of Chernobyl New Safe Confinement
The New Safe Confinement (NSC or New Shelter; Ukrainian: Новий безпечний конфайнмент, romanized: Novyy bezpechnyy konfaynment) is a structure put in place in 2016 to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, in Ukraine, which was destroyed during the Chernobyl disaster in 1986. The structure also encloses the temporary Shelter Structure (sarcophagus) that was built around the reactor immediately after the disaster. The New Safe Confinement is designed to prevent the release of radioactive contaminants, protect the reactor from external influence, facilitate the disassembly and decommissioning of the reactor, and prevent water intrusion.
Megaproject in the context of King Abdullah Economic City
King Abdullah Economic City (KAEC, /ˈkeɪk/; Arabic: مدينة الملك عبد الله الاقتصادية) is a planned city in Rabigh Governorate, Mecca Province, Saudi Arabia. It was announced as a megaproject in 2005 by King Abdullah bin Abdulaziz. It is located in close proximity to Thuwal, almost 100 km (62 mi) north of Jeddah.
It was one of six megaprojects that were announced in 2005 and is the only one that was launched. By 2018, The Financial Times wrote that the city had not attracted investment or become a hub for logistics and manufacturing, contrary to the grand plans behind the project. By 2018, the city had a population of 7,000.