(2) If the commission finds the operation has caused deterioration of the natural run of anadromous fish or any population of resident game fish in the waters covered by the permit, it may require the permittee to return the fish populations to the same condition that existed prior to issuance of the permit. If the permittee fails to take appropriate action, the commission shall take such action and the permittee shall bear any cost incurred by the commission. [1971 c.203 §6; 1973 c.356 §2; 1975 c.253 §32; 1979 c.556 §2; 1989 c.817 §2]