DUE TO THE INSTALLATION OF PTT MH KP.0+179.7, THIS AREA IS INSTALLAED THE STEEL CASING 6” ALONG THE LENGTH. UNABLE TO MOVE THE POSITION OF PTT MH KP.0+179.7 BECAUSE THERE IS NO SPACE TO INSTALL. SO IT MUST BE CUT STEEL CASING 6” INTO THE WHOLE LENGTH 12 m.