The Kenai rivers total nursery capabilities presently are unknown. Official run records go back to around 1900, only legends go before that. Those legends tell of salmon runs all year long, with light runs in the winters and heavy runs in the summers. It is very possible that we have not even begun to see what the Kenai river is able to sustain. Her turquoise green waters conceal countless generations which have lived and died within her.
Present runs are only the end results of thousands of years of only the strongest surviving.
It is very possible that she is the best producer of salmon on earth.