In many areas of the US, the river levels are controlled by recreation management service. Depending on the available water reserves, the river flows and levels can be adjusted. The control of flow is very important to white water rafting companies.
Recently, an article was published talking about this very issue in Colorado and the Arkansas River. Joe Greiner, owner of Wilderness Aware Rafting and member of Rafting America commented on the river flow program.
"Without it outfitters would have to cancel trips during the busiest time of the tourist season... The difference between being a viable industry and one that’s just limping along."
Support for these types of programs is also welcomed from the public and anyone involved in recreation managment. Lets keep those river levels up so we can enjoy mother nature!