Digital Topographical Survey At Ranirhat-Kawkhali Road(Z-1613), Bangalhalia-Rajasthali-Farua-Bilaichhari-Barkal Road(Z-1814) And Sub-Soil Investigation Of Ranirhat Bridge At Ch-40+264Km Of Chittagong-Hathazari-Rangamati Road(N-106) , Rajasthali Bridge At Ch 20+300Km At Bangalhalia-Rajasthali-Farua-Bilaichhari-Barkal Road(Z-1814) & Boropul-2 Bridge At Ch15+308Km At Bogachhari-Nannerchar-Longadu Road(Z-1612) Under Rangamati Road Division During The Year Of 2025-2026.