All work on the large masses of bedrock was conducted by hand, without any help of powered machines, as the first power station in Boden was not constructed until almost ten years later in 1909. The first work that was done at the site was to create a large ditch, wide and with a depth of or more, that would surround the core of the fort. Creating patrol trenches and placements for the turrets on the top of the forts was also work done early on. The teams of workers would first bore down in the bedrock using pinch bars and sledgehammers, then use black powder to blast the rock into manageable pieces which could be transported away from the site, using wheelbarrows, horse-drawn carriages and in some cases Decauville railways. When the ditch, or parts of it, had been completed, work started on the inner part of the fort by boring horizontally from the bottom of the ditch into the mountain itself. This work was a lot harder—the cost for each cubic metre of blasted tunnel was five times the cost of a cubic metre of blasted ditch—both due to the confined space in the tunnels and the risk of damaging the bedrock. The use of black powder instead of dynamite reduced the risk of bedrock damage, but it also increased the time needed to complete the tunnels. All in all, the amount of bedrock bored, blasted, loaded and transported away from the forts has been estimated to be around .