Abstract: The development of new infrastructure aimed to stimulating economic growth, often disrupt existing facilities. The construction of toll roads in the Northern Sumatra, for example, passes through a 12 inches transmission gas pipeline that connects Kawasan Industri Medan (KIM) – Kawasan Ekonomi Khusus (KEK) Sei Mangkei. This causes crossings at six location points and results in additional loads on the gas pipelines which were not previously calculated. Therefore it is necessary to relocate the gas pipeline. However, there are many risks that might occurred in relocating gas pipeline. Hence the risk assessment must be considered to find out which risk variables have the highest influence on this gas pipeline relocation. The result of risk analysis indicates this gas pipeline relocation as a whole has moderate risk status, with safety & security risk category relating to safety in doing work, both during construction and operation, being the risk category that has the highest risk. There is a potential loss from gas sales and distribution of USD 55.223 per year if gas pipeline is not relocated, by assuming there is only one damage occurs per year at each of crossing points (six crossing points) and requires seven days repaired time of each. And also there is a potential loss of USD 320.132 if gas pipeline is relocated but the risks are not mitigated. Although risk mitigation requires an additional cost of USD 45,596 to mitigate 23 risk variables, however these costs can provide a potential cost savings of USD 274.536 compared to if the risks in this gas pipeline relocation are not mitigated.

Keywords: Gas Pipeline Relocation, KEK Sei Mangkei, Risk Analysis

| DOI: 10.17148/IARJSET.2021.8523