Airborne surveys are used to gather additional geological information about potential siting areas. They help us build a more detailed understanding of bedrock geology both at the surface and deep underground.
Surveys are conducted in locations where earlier assessments suggested there may be large areas of land that may meet the technical safety requirements for a deep geological repository. In order to better understand the surrounding geology, the areas being surveyed are much larger than what would be required for a deep geological repository and associated facilities.
To conduct the surveys, aircraft fly approximately 100 metres above the surface, capturing the areas that desktop studies identified as potentially suitable. To collect data, aircraft fly along a number of straight lines over the areas, with approximately 100 metres of spacing between each adjacent line. To minimize noise disturbance, adjacent lines will not be flown one after the other.