In order to expand the recreational options, the bottom of the lake was dredged, and a total of 600,000 cubic meters--the equivalent of 40,000 15-ton truckloads--of outside earth were brought in and unloaded into Tapo Lake to form two artificial islands.
而為了增加遊憩功能，一方面挖出大坡池底泥，一方面自外地運來「客土」，以總計 60 萬立方公尺、相當於 4 萬輛 15 噸大卡車的載運量泥土，倒進大坡池中，堆出兩座人工島嶼。