National and State Register

Big Thompson River Bridge IV

Larimer County

Constructed in 1933, the steel rigid connected camelback pony truss extends for 100 feet across the Big Thompson River.  Designed by the Colorado Department of Highways, fabricated by Midwest Steel & Iron Works, and built by Lawrence Construction Company, the 164-foot long bridge continues to provide an important transportation link along the route to Rocky Mountain National Park.

A photo of the bridge from a bank in black and white. The bridge has support girders on either side and lots of foliage around.

Big Thompson River Bridge IV (1999 photograph.)

The bridge is one of four located on the upper Big Thompson River, comprising the last surviving group of such trusses in the state.  The property is associated with the Highway Bridges in Colorado Multiple Property Submission.