Work undertaken included:
- Four of the above projects involved jacking under live railway lines with minimal settlement occurring.
- Variable ground conditions including fill with concrete obstructions, silts and sands, sandstone and basalt.
- Drill and blast technique used in basalt.
- Pipe grades ranged from 0.2% - 1.5% and pipe jacking carried out in both upstream and downstream directions.
- Jacking shafts ranged from 4m - 8m deep and generally constructed using sheet piles.