"The water storage also makes agriculture more reliable, less prone to drought and flood."

Name somewhere in BC where they use the water in a hydro reservoir for agriculture.  For every one you name, I will name two that don't. 

I know for a FACT it isn't on the Peace. 

Just because you say it, and give examples outside of BC, doesn't make it true for the devastation that has occurred in BC due to hydroelectricity. 

BC Hydro's legacy is one of destruction in the BC interior.