Boulder Creek Bridge (Boulder, Colorado)

The Boulder Creek Bridge near Boulder, Colorado is a concrete slab and girder bridge which was built in 1953. It was listed on the National Register of Historic Places in 2003.[1]

Boulder Creek Bridge
Arched support beam is visible in shadow under bridge deck
Boulder Creek Bridge (Boulder, Colorado) is located in Colorado
Boulder Creek Bridge (Boulder, Colorado)
LocationState Highway 119 at milepost 39.13
Nearest cityBoulder, Colorado
Coordinates40°00′53″N 105°19′16″W / 40.01476°N 105.32100°W / 40.01476; -105.32100
Arealess than one acre
Built1953
ArchitectU.S. Bureau of Public Roads
Architectural styleConcrete slab and girder
MPSHighway Bridges in Colorado MPS
NRHP reference No.03000103[1]
Added to NRHPMarch 11, 2003

It brings Colorado State Highway 119 over Boulder Creek, and was under Federal rather than state management as the highway provides access from Boulder to the Roosevelt National Forest.[2]

It was designed by the U.S. Bureau of Public Roads.[3] It is 100 feet (30 m) in total length, and 39 feet (12 m) wide carrying a 34 feet (10 m)-wide roadbed. It consists of three spans, the main one being 48 feet (15 m) long. It has concrete abutments, wingwalls, and spill-through piers. Steel flex beams on the approach were a later addition.[2]

It was deemed technologically significant as one of the first concrete girder bridges in Colorado of a new type, having parabolically arched beams rather than flat ones, and supported by concrete spill through piers.[2]

References

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  1. ^ a b "National Register Information System". National Register of Historic Places. National Park Service. November 2, 2013.
  2. ^ a b c Colorado Office of Archaeology and Historic Preservation; Clayton Fraser (May 21, 2002). "National Register of Historic Places Registration: Boulder Creek Bridge / CDOT No. D-15-AK: 5BL79". National Park Service. Retrieved October 10, 2021. With accompanying two photos from 2000
  3. ^ "Boulder Creek Bridge". History Colorado. Retrieved October 9, 2021.
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