Canals longer than 30 tiles have to be approved by Sklotopolis Head Staff (Dominikk, Engineer, Sklo) in order to be built. For that, you will need to create a post in the General discussion thread. This post has to include all the people that work on it and a plan for the canal. The plan needs to include the location of the bridges to cross the canal and the size of the canal. Once posted we will take a look at it and let you know about our decision in a few days. With these guidelines we can guarantee that the canals actually get finished, done properly, and do not block people from specific areas.