Application on Survey Implementation of Dredging and Structure for Energy Reducing Spillway Building at Ladongi Dam

The Energy Reduction Building planned at Ladongi Dam utilized the Type II Olakan Flat Pond Type (USBR II). Energy absorbers in spillway buildings are very important to reduce the energy of water flow and avoid damage to rivers. The purpose of this study is to determine the role of the survey in the implementation of excavation and also the structure buildings in the field and be able to process and present measurement data. Data field collection consists of 3 working stages: excavation work, working work floor and working wall structure. The calculation of excavation volume in this final project is carried out by measurement using the Cross Section and in volume calculation using the Mean Area method. The results from this study are, the role of the survey in the construction of energy reduction building, the volume of excavation and foundry of work floors, the dental importance of wall structures, cross-section, 3-dimensional view of excavated land. LW 33 block dental volume is 138.99 m3 starting from an elevation of +60.11 to an elevation of +64.50. In Block LW 33 LW 35, a landslide occurred in the zone 3 slopes parallel to the structural parapet (El. +64.5 El. +67.5) therefore dental filling was carried out, the total required dental volume was 164,954 m3. The total volume of excavation to the work floor elevation is 505,609 m3, and the total volume of additional landslide structures is 893,329 m3.