The next, and biggest, issue was cutting a mountain in half and moving soil to fill in Subic Bay and create a  runway. The Seabees blasted coral to fill a section of Subic Bay, filled swampland, removed trees as large as  tall and  in diameter.
The next, and most significant, challenge was cutting a mountain in half and moving soil to fill in Subic Bay and construct a runway. The Seabees blasted coral to fill a section of Subic Bay, filled swamp land, removed trees as large as  tall and wide.