However, ships following the GyeongBu Canal will take 25 hours to finish the trip. Critics believe this plan would just be a waste of money. In addition, it could be harmful to the environment and damage cultural treasures. On the other hand, supporters of this plan say that this canal will lessen congestion on the GyeongBu Expressway and GyeongBu Railroad line. Furthermore, sand from dredging the river bed could be sold for use in construction. They argue that this money could be used to fund the construction of the canals. However, critics argue that sand prices will be so cheap that little money will be earned from selling the sand. They say that it is only beneficial to the construction industry.