Balfour Beatty was the design-build contractor responsible for the relocation of the Alameda Corridor Transportation Authority’s (ACTA) existing freight corridor into a 30-foot-deep trench.
The scope included construction and surfacing of 330,000 track feet (62.5-miles) of new line on wood and concrete ties, removal of 200,000 track feet (37.88-miles) of existing track, installation of 108 new switches (10s, 14s, and 20s) on wood and concrete ties, five new crossing diamonds, 15 new road crossings and rehabilitation of 32,000 track feet (6.06-miles) of existing track. Balfour Beatty worked closely with the owners and railroads to ensure a safe and proper production schedule. All of the work was performed adjacent to an active rail line.
Following the completion of the corridor relocation project in 2002, Balfour Beatty entered into two successive contracts to provide signal and crossings maintenance of the 20-mile Alameda Corridor, which runs from the ports of Los Angeles and Long Beach to the yard of the Union Pacific Railroad in Commerce, California and the Burlington Northern Santa Fe Railway’s (BNSF) Hobart Yard in Vernon, California.
The corridor is comprised of 62-miles of track and 128 power switches. The corridor has two major pump stations that are used extensively in the winter months to pump water out of the trench that comes from rain run-off. The corridor is 50-feet wide and 33-feet deep with only one public road crossing. There are 32 local streets that pass over the top of the corridor and five major bridges. There are more than 42,000 pilings that were driven side-by-side and then covered with shotcrete to form a solid wall. Struts were pre-cast and put in place at 25-foot intervals to hold the concrete walls. The number of struts exceeds 20,000.
Balfour Beatty provided maintenance for all track, signal, communication, rail flaw detection and right-of-way maintenance. Balfour Beatty maintained the triple mainline to Class 4 track and signal and UPRR standards, as the Union Pacific Railroad is the oversight for all track and signal standards and safety rules. Balfour Beatty was also responsible for training all employees on the ACTA contract to adhere to these rules and regulations and tested all employees twice yearly. Balfour Beatty followed all bridge standards according to the BNSF’s bridge standard specifications.