For Sapanca/Yuvacik Drinkingwater Facility 2 X 359 m in length 1000 mm diameter HDPE pipes have been installed. 19m X 9m X 2m sized tripod floating excavators has been worked for canal excavation operation. During the underwater canal excavation, concrete pier that was sunk on the area of canal because of an earthquake has been scanned by breaking with hydraulic breakers and sunk at the area of the pipe. 2 concrete water taking structure which are 18 tons of weight has been mounted to the lines at -12 meters depth and the operation has been accomplished.