Meanwhile, there was an modernization of the upstream logistics. A breakthrough occurred when it was established that lumber did not have to be air-dried for two years before being made to pulp, freeing up a storage site at Veden which had stored up to one million logs. Trucks were introduced in transport and hundreds of kilometers (hundreds of miles) of lumber roads were built to ease extraction. For instance they were used to truck lumber from Store Le to Øymarkasjøen, thus closing the Otteeid Canal. Increased lumber demand was covered through procurement from Värmland and the Glomma watershed. Log driving was eliminated on tributaries and limited to the main course of Haldenvassdraget.