Labo Del Rio Bridge

The Labo Del Rio Bridge, over the Piedra River near Arboles, Colorado, was designed and built in 1913 by the Missouri Valley Bridge Company with steel by the Illinois Steel Company. It is a Pratt through truss bridge. It has also been known as Bridge over Piedra River. The bridge cost the state $3,395. It was listed on the National Register of Historic Places in 1985.^[1]

Labo Del Rio Bridge
U.S. National Register of Historic Places
The bridge in late 2014.
Labo Del Rio Bridge Show map of Colorado Labo Del Rio Bridge Show map of the United States
Location	County Road F40 over the Piedra River
Nearest city	Arboles, Colorado
Coordinates	37°4′33″N 107°24′17″W
Built	1913
Built by	Missouri Valley Bridge Company
Architectural style	Pratt through truss
MPS	Vehicular Bridges in Colorado TR
NRHP reference No.	85001399[1]
Added to NRHP	June 24, 1985

It was deemed significant as the oldest surviving roadway truss bridge over the Piedra River, as one of few surviving in the state built by the Missouri Valley Bridge Company, and as the oldest known through truss made for the State Highway Commission. It is a six-truss bridge with an interesting, transitional type of pin-/rivet- connection.^[2]

It first carried State Primary Road 15 in a crossing near Pagosa Springs; it was moved later to cross the Piedra River at its current location, on the Southern Ute Indian Reservation in the southern part of Archuleta County.^[2]

References

1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. Clayton Fraser and Carl Hallberg (January 18, 1984). "HABS/HAER Documentation: Labo Del Rio Bridge / Bridge over Piedra River / CDH:AR50-W0.1-S151". National Park Service. and accompanying photo from 1984