Constructed near the town of Steamboat Rock in Hardin County , Iowa , this is the first launched steel I-girder highway bridge in the United States and one of the longest I-girder spans ever launched in the world. The unique construction method was used to preserve the Iowa River Greenbelt, one of the few remaining old-growth woodlands in north central Iowa . The bridge design and the construction process were developed following years of intensive study into the area's biology and cultural resources, and with the goal of preserving this environmental treasure.The opening of the bridge in August 2003 was also a major step towards the decades-old dream of a four-lane US 20 across Iowa . US 20 is now a four-lane highway from the Mississippi River to Fort Dodge.

Mamiya RZ67 Pro II, 65/1:4LA, Kodak Ektar 100@100; ƒ32, 10 seconds. 2stp ND Grad.