Maryland officials have debuted the initial design concept for the reconstruction of the Key Francis Scott Key bridge: a two -kilometer -long structure that will be the first of its kind in Spain.
Designed by Kiewit Infraestructure Co. By virtue of the first phase of $ 73 million of a progressive design building contract with the Marland Transport Authority (MDTA), the bridge will be longer and higher than in its 70’s in the state of the state of the state of the state of the state Arch of the 70’s space. Claring vertical and horizontal to accommodate increasing ships shouting at the port of Baltimore. The design requires that the two main pylons 600 feet high be separated by a maximum of 1,600 feet, with the height of the roof of the bridge above the main shipping channel of the deep draft of at least 230 feet .
The original 1.7 mile steel bridge, which collapsed after being hit by the neo-panamax container bin with disability m/v Dali in the early hours of March 26, 2024, provided only 1,209 Horizontal detachment between the main extensions and 185 ft of vertical liquidation above the canal. The main duration of the new cable bridge will exceed 3,300 feet, an increase of more than 600 feet on the original length of the continuous transmission.
The new bridge will occupy the same footprint at the mouth of the port of Baltimore, restaurant El Baltimore Belt with two lanes 12 foot in each direction and 10 and 4 feet wide and inside the shoulders, respectively. Maryland officials say that the structure will also have the news in dock protection technology, whose absence on the original key bridge may have contributed to the collapse of the structure.
According to the preliminary report of the National Transport Safety Board, the original bridge included four large dolphins to protect the pylons that support the central extensions. Each dolphin was composed of a pile of 25 feet in diameter full of tremie concrete and covered with reinforced concrete. The dolphins were equipped with a 17 -foot rubber defenses in various places. Each of the main pylons was also surrounded by a crushed concrete box of 100-X-84.5 feet and a wooden defense system.
The NTSB report says that, while Dali hit the pylon defense system at 6.5 knots, he lost the nearest dolphin, at approximately 491 feet upstream of the pylon and 550 feet of the line. Central of the Central Line of the Navigation Channel. The impact caused six extensions to collapse in the water and the boat’s arc, killing six construction workers who had been making concrete roof repairs at that time. NTSB did not say when he expected to complete the investigation of the incident, which closed the port of Baltimore for several months and continues to disrupt traffic in the city and in the surrounding area.
With the new concept of design, MDTA assures that the project will advance with the second phase of the progressive design of design design process, which includes the final design, the demolition of the original structures of the key bridge and the construction. Kiewit will have exclusive negotiation rights for this work, which is expected to cost $ 1.7 billion. No calendar has been announced for phase 2, except for the scheduled end goal of autumn 2028.
Pre -construction and soil sampling polls began in January.
