The first group are those state parks managed by the Iowa Department of Natural Resources.

In 1975 the Iowa Department of Transportation was formed.

The Iowa Department of Transportation decided to study the idea in 1988.

The Iowa Department of Education eventually was asked to help resolve the dilemma.

The park is operated by the Iowa Department of Natural Resources.

These changes first appeared on the 1981 state map published by the Iowa Department of Transportation.

The station is currently owned by Iowa Department of Transportation.

It is licensed by the Iowa Department of Education to certify teachers.

Ames has the headquarters for the Iowa Department of Transportation.

In 1957, when plans were made to upgrade to a jet port, the Iowa Department of Transportation took over the road.