Assignment text
Preliminary surveys for contract E6 have concluded that acid-forming rock (alun slate) will be found in the first part of the clean water tunnel from Stubberud. Based on the scheduled progress, these are expected to be found in the period late 2023 to December 2024.
The contracting authority's estimate is approx. 40,000 solid cubic metres. There is a lot of uncertainty as to the volume of matter that will need to be delivered, and uncertainty as to exactly when (according to progress) in the site phase the project will meet the zones with a higher risk for finding acid-forming rock. A contract is needed with a reception place for this matter.