Castle Rock Upper Bridge
Oblique view from northwest
In this photo, water flows from right to left
Photo taken by Roger Deschner in May 2015
License: Creative Commons Attribution-Share-Alike (CC BY-SA)
BH Photo #325488
One of two bridges on a former alignment of Boulder Canyon Highway (CO 119). When the highway was routed on a new alignment in 1953, this section of the old road, with its two bridges, was left in place, with picnic tables installed. The area around this bridge is popular today for rock climbing on Castle Rock.
NBI lists construction date as 1930, noting that dates ending in 0 are often estimates.
The two bridges are very different. This one is a steel girder/floorbeam system bridge with a jack-arch deck.
- Steel girder/floorbeam bridge over Middle Boulder Creek on Old Boulder Canyon Drive (Co Rd 54A, former CO 119)
- Boulder County, Colorado
- Open to traffic; posted for load
- Built ca. 1930; bypassed 1953, but left in place to serve recreational area
- Girder/floorbeam system with jack-arch deck
Length of largest span: 28.5 ft.
Total length: 33.1 ft.
Deck width: 15.4 ft.
Eligible for the National Register of Historic Places
- Approximate latitude, longitude
- +39.97921, -105.45444 (decimal degrees)
39°58'45" N, 105°27'16" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 13/461197/4425548 (zone/easting/northing)
- Quadrangle map:
- Inventory number
- BH 67775 (Bridgehunter.com ID)
- Inspection (as of 01/2015)
- Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 28.0 (out of 100)
- Average daily traffic (as of 2011)
- October 23, 2015: Updated by Roger Deschner: Added category "Jack Arch Deck"; added photos
- May 25, 2015: Added by Roger Deschner
- Roger Deschner - rogerdeschner [at] gmail [dot] com