Abstract
The construction project of the diversion structure for Bagong Dam in Trenggalek Regency is a project owned by the Ministry of Public Works and Public Housing (PUPR), under the Directorate General of Water Resources, BBWS Brantas, and the SNVT Dam Construction – PPK Dam 1, with the contractor being the joint operation of PT PP – PT Jatiwangi (KSO). Bagong Dam is being built with the primary objective of providing agricultural and raw water needs in Trenggalek Regency, East Java. In addition, the dam also functions as flood control, a source of irrigation, a hydroelectric power plant (PLTA), and has the potential to become a new tourist destination.The dam is designed to supply irrigation water to 1,021 hectares of agricultural land in Trenggalek. With a storage capacity of 17.4 million cubic meters, the dam is capable of reducing the flood discharge of the Bagong River by up to 78.44%. Proper optimization of heavy equipment is required to realize the project in a timely and cost-efficient manner. The author developed a plan to optimize the use of heavy equipment, scheduling, and budget estimation, specifically for the earth excavation works of the diversion structure, which includes the inlet, outlet, and tunnel sections. The data required for determining the optimal use of heavy equipment includes project drawings, work plans, the 2022 unit wage price list for Trenggalek Regency, and the productivity rates of the heavy equipment used. The planning of equipment combinations was carried out using an optimization method.The optimization results determined the most cost- and time-efficient heavy equipment selection. The project is planned to be completed within 59 weeks or 413 working days, with a total cost of IDR 23,752,970,716.
Keywords : Heavy Equipment Optimization, Earth Excavation, Diversion Structure, Trenggalek