Instream flow rights differ from RICD's. It takes a lot less water to keep fish happy than your average boater. Instream flow rights are typically controlled by the Colorado Water Conservation Board (CWCB). Interestingly, the CWCB would probably oppose most RICD's because they pose a risk to the State's water supply. For example: An RICD in Fruita would truly screw Colorado in its interstate compacts; it would prevent Colorado from utilizing it's full share of the Colorado River.
Recently, during a conversation with a very well informed water resource engineer, I was shocked by his statement: RICDs ask for too much water, kayak parks should be built to work at 50 cfs. Needless to say, I explained that surfing on 50 cfs is like skiing in New England, "yeah you can do it, but NO FUN." Kinda a reminder to politely educate when you can.