Saemangeum Seawall was built in a tidal flat zone on the Yellow Sea (The world's second largest tidal flat). The seawall is 33 miles long. At an opening ceremony, incumbent president Lee, Myung-Bak has commented that Saemangeum would be “. . . the kernel and the gateway of South Korea’s west coast industrial belt,” and is “another effort by us for low-carbon and green growth, along with the four-river project.”  The barrier was then used to reclaim land by filling.The newly reclaimed land to be used for industrial activity (the region has little), golf courses and water treatment plants.