Otter Tail Corp

Several class action complaints have been filed against Northern Pipe Products, Vinyltech Corporation, Otter Tail Corporation and certain other parties. The complaints allege, among other things, that the defendants and alleged co-conspirators conspired to fix, raise, maintain, and stabilize the price of PVC municipal water, PVC plumbing pipe, PVC pipe fixtures and PVC conduit pipe in violation of United States federal and state antitrust laws, Canadian competition laws, and consumer protection and competition laws. See Note 9, Commitments and Contingencies, to the consolidated financial statements, which is incorporated herein by reference, for further discussion of this matter.