The survey involved conducting an overhead line survey using RTK GNSS to determine the exact position of the overhead line using Ordnance Survey OSGB coordinates. Additionally, a Total Station survey was conducted to accurately record the 3D location of the conductor attachment points and insulator locations. Using this precise data, LDT was able to generate a three-dimensional model of the power line using AutoCAD and Optimal Design software. By understanding the precise location of the conductor in relation to its sag and swing, LDT provided guidance on the optimal placement for lifting portacabins, ensuring the safety of crane operators and ground workers.