at Boden ()—which was the term used until the First World War when the present name Boden Fortress came into widespread use—was largely based on the proposal laid forward by the Fortification Committee of 1897, with only minor modifications. Even before any construction work had started the cost of the forts had been estimated to exceed the previous calculations by fifty percent. In December 1901, only few months after the first blasting work that had been done at Gammelängsberget in July 1901, the cost for the four forts northeast of the river was expected to be sixty-five percent more expensive than the initial calculation. The blueprints of the forts at Degerberget, Gammelängsberget and Södra Åberget were the first to be confirmed, which happened on 11 May 1901. The fort at Mjösjöberget followed suit on 3 April 1902 and the last fort to get a confirmed blueprint was the fort at Rödberget, on 19 May 1903. The last proposed fort, at Paglaberget, was deleted from the plans in 1906—along with the batteries at Fällberget and Slumpberget as well as the fortifications at Avan and Svartbyträsket—before any work on the fort had started, due to the proposal of the new Fortification Committee of 1905, which was formed following the reports of the large rise in costs. On 9 February 1906, the current Minister for War Lars Tingsten calculated the total cost to end at 19,220,000 kronor, more than twice the cost reported by the 1897 committee. 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