Seeking to meet mandated cuts for the discharge of nutrients into the nation’s largest estuary, the Chesapeake Bay, a Maryland wastewater treatment plant and its design, construction and technology team are using what they say is the world’s largest application of a pollutant-reduction technology as part of a $138.7-million facility upgrade. Team officials at the Patapsco wastewater treatment plant in Baltimore say use of the “fixed-film denitrification system” for tertiary treatment at the facility will reduce nitrogen and phosphorous discharges into the Patapsco River by 83% and 85%, respectively. The waterway is a key tributary of the bay, now on
The Hong Kong Water Supplies Dept. has awarded AECOM a $55-million design and construction services contract to reconstruct and upgrade the Sha Tin Water Treatment Works, one of Asia’s largest water treatment plants. Sha Tin consists of two treatment trains. AECOM will oversee the expansion of the South Works to 145 million gallons per day from 95 mgd. The North Works has a capacity of 232 mgd but is not being upgraded. The overall capacity of the two plants will increase to 377 mgd from 327 mgd. Sha Tin provides water to two million people. AECOM will provide detailed design
For the second time in six months, an unexpected intrusion of water and mud has stalled the $447-million construction of a third water intake at Lake Mead near Hoover Dam in southern Nevada. The problem could delay project completion at the drought-ravaged lake by a year and increase costs by “tens of millions,” says a project official. Photo: Courtesy of SNWA Water intake construction project at Lake Mead could face delays and higher costs because of unexpected water and mud 600 ft below ground. + Image The new intake is intended to draw water deeper from the dwindling lake that
Japan and China have cornered the market in major cable-supported bridges in recent years. But now another East Asian rival is on the rise. South of the Russian port city of Vladivostok, the world’s longest cable-stayed span—at 1,104 meters—is due to start erection next April. Spanning the “eastern Bosphorus” waterway from the southern tip of the Nazimov Peninsula, the Russky Bridge is a key element in the work to prepare Russky Island to host the 2012 Asia-Pacific Summit, which will include U.S. and Canada government heads. To feed traffic to the new crossing, work has advanced further on a second
Planners of the $6.6-billion Femern Belt road and rail link between Denmark and Germany have rejected a bridge option in favor of a 18-kilometer-long sunken-tube tunnel. Government confirmation of the choice is expected next month. The process of prequalifying contractors is scheduled to start later in 2011. Running between Puttgarden, on Germany’s Fehmarn Island, and R�dby, on Lolland Island, Denmark, the project will provide a new route from Scandinavia to Central Europe. LUNDHUS Following extensive studies by two international design teams, officials at the project developer, Denmark’s Femern A/S, Copenhagen, say a tunnel poses fewer construction and operational risks than
After years of discussion, Israel’s Transportation Ministry finally is proceeding with plans to build an estimated $700-million high-speed railway to the southern port of Eilat, the country’s largest resort and a major port for shipments to and from the Far East. The ministry now seeks expressions of contractor interest in the project. Israel already has invested several billion dollars in recent years in national rail projects as part of a government effort to upgrade the country’s infrastructure. In November, the ministry announced a multibillion-dollar plan for additional upgrades as well as new rail lines and roads. The ministry plans a
A $410-million Lima Metro Line 1 is on pace for completion in June 2011, Peruvian officials say. The 18-month project involves the construction of 11.7 kilometers of new train line and nine stations as well as the complete refurbishment of 9.8 km of existing line and seven stations. Approximately 85% of the civil works for the 22-km-long route are expected to be completed by the end of the year. The Consorcio Tren Eléctrico, in public-private partnership with the Peruvian government, is the general contractor. Consortium members include the Brazilian construction firm Odebrecht and the Peruvian company Gra�a y Montero, with
An international consortium has won the $1.45-billion contract to construct the first metro train line for Panama City, Panama. The Consorio L�nea Uno consists of Spain’s Fomento de Construcciones y Contratas (FCC), Brazil’s Odebrecht and France’s Alstom , which will supply the trains for the project. Work is scheduled to start in January. When completed in 2013, the Metro Line 1 will cover a 14-kilometer north-south route across the Panamanian capital, with a 7-km underground stretch. The trains will be powered by a third-rail source using direct current at 750 volts. According to the Panama City Metro Secretariat, the finished
Turkish State Railways’ (Turkiye Cumhuriyeti Devlet Demiryollari, or TCDD) plans to build a 6,000-kilometers network of high-speed track have received a major boost from China. Chinese Premier Wen Jiabao signed an agreement in early October in Ankara to loan approximately $28 billion for construction of a 2,000-km high-speed Silk Road Railway. The route will connect Edirne, which is on Turkey’s western border with Bulgaria, and Kars, which is in the northeast near the closed border of Armenia. The Kars–Tbilisi–Baku conventional railway—which links Turkey, Georgia and Azerbaijan—has been under construction since 2007 and is scheduled for completion by 2012. + Image
Eiffage, France’s third-largest contractor, is building a $315-million toll road in Dakar. Eiffage will have a 30-year concession to build, finance, operate and maintain the 25-kilometer-long road. At present, more than 100,000 vehicles use a double-lane road to enter and exit Dakar on a daily basis, causing severe traffic congestion. The Dakar-Diamniadio toll road is expected to cut the average commute to less than 30 minutes from two hours. Work already has begun on the easternmost segment in the suburb of Diamniadio. But land purchases are still under way in the urban district of Pikine in Dakar. Several thousand families