Preservation Iowa, formerly called the Iowa Historic Preservation Alliance (IHPA), was founded in 1989 by members of the public concerned about the destruction of significant historic sites and buildings in the state of Iowa, United States.
Preservation Iowa sponsors two programs, Iowa’s Most Endangered Properties and Preservation at its Best Awards. Currently, it is undertaking initiatives to document barns, country schools, and small-town movie theaters. Preservation Iowa and the National Trust for Historic Preservation are combining efforts to document and mitigate the effects of the 2008 Iowa floods on historic structures.
More information on the Wikipedia page 
The website is