News Port Authority investigating possible leak from underground wall holding Hudson River from World Trade Center site, report says A section of the slurry wall, the surviving retaining wall of the original World Trade Center, seen during the opening ceremony for the National September 11 Memorial Museum at Ground Zero on May 15, 2014. Photo Credit: Getty Images / Pool By AMNY.COM August 25, 2015 9:56 AM Print Share fbShare Tweet Email An underground wall that separates the rebuilt World Trade Center complex from the Hudson River may be leaking, DNAInfo reported Tuesday. The website reports, based on anonymous sources, that workers have heard "rushing water behind the walls of lower concourses of the complex within the last two weeks." But a Port Authority spokeswoman said engineers hadn't reported any issues involving the slurry wall. Built in the 1960s, the slurry wall was considered an engineering marvel for its ability to hold back the Hudson River while constructing the original World Trade Center that was destroyed on Sept. 11. The Port Authority spent millions of dollars repairing the wall after the attacks. By AMNY.COM Share on Facebook Share on Twitter Comments We're revamping our Comments section. Learn more and share your input.