CHDS State/LocalResearch indicates that the benefits of regionalization include optimal resource allocation and enhanced communication across jurisdictions. In this thesis, regionalization is defined as the act of the region collaboratively working across jurisdictional boundaries in a formal capacity to network, preplan and respond during incidents. The 2009 Kentucky ice storm devastated the entire state. Some counties throughout the commonwealth collaborated during the response; however, only one region out of eleven formally regionalized. Possible factors related to regionalization will be explored, such as support and understanding by leaders of the concept and the importance of networking with a variety of agencies. Networking is described as interorganizational interaction and communication. Tools from social network analysis are used to visualize networking and collaboration during the 2009 Kentucky ice storm. In addition, regionalization is discussed in the context of area command. Using a case study and interviews, this thesis investigates regionalization in Kentucky as it relates to the 2009 ice storm. Recommendations are presented for improving responses to future large-scale disasters utilizing regionalization.http://archive.org/details/unitedwestanddiv109455814Approved for public release; distribution is unlimited