The Trump administration has stepped up the rebuilding of the dilapidated U.S.-Mexico border wall and is finally moving on new extensions of the 30-foot-high barrier as it aims to install 500 miles of a new “border system” by the end of next year, officials said on Monday.

Compared to the last wall building effort in 2006 under President George W. Bush, when it took two years to start digging on approved projects, the Trump administration has cut that to 9-11 months, said a senior administration official.