THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Otter Tail Corporation (OTTR)

3/8/2006 Proxy Information

Mr. Emmen is a retired Senior Vice President, Finance, Treasurer and Chief Financial Officer of Otter Tail Power Company,a subsidiary of Otter, in Fergus Falls, Minnesota.

Mr. MacFarlane is the Chairman and former Chief Executive Officer and President of Otter Tail Corporation, Fergus Falls, Minnesota.

3/10/2005 Proxy Information

Mr. Emmen is a retired Senior Vice President, Finance, Treasurer and Chief Financial Officer of Otter Tail Power Company,a subsidiary of Otter, in Fergus Falls, Minnesota.

Mr. MacFarlane is the Chairman and former Chief Executive Officer and President of Otter Tail Corporation, Fergus Falls, Minnesota.