A toxic spill, the Sandoz chemical spill of 1986, upended the work involved to clean the basin and the ICPR were required to integrate more tasks into their plan which provided the framework for the Rhine Action Programme. The existing institutional framework of the ICPR allowed for the additional regulations required for the spill to be incorporated. Improving the Rhine ecosystem and drinking water for future use were already in place, the reduction of river sediment pollution, and rehabilitation of efforts—removal of concrete structures and small dams for better fish migration, removal of contaminated sediment—were added.