+37.67575, -108.81601
37°40'33" N, 108°48'58" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 491 ML over ALKALI CREEK
Structure number:N-01-A
Location:1.5 MILES NW CAHONE
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:14.1 ft. [4.3 m]
Total length:28.9 ft. [8.8 m]
Deck width edge-to-edge:87.9 ft. [26.8 m]
Owner:State Highway Agency [01]
Year built:1937
Year reconstructed:1960
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:2
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: February 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,800 [as of 2011]
Truck traffic:18% of total traffic
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Culvert condition:Moderate to major deterioration or disintegration, extensive cracking and leaching or spalls on concrete or masonry walls and slabs. Minor settlement or misalignment. Noticeable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection in one section, significant corrosion or deep pitting. [5]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:85.1

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
February 2017Fair5 out of 10280085.1
March 2015Fair5 out of 10280085.1
February 2013Fair5 out of 10280085.1
February 2011Fair5 out of 10430084.6
March 2009Fair6 out of 10430095.8
February 2007Fair6 out of 10350096.0
March 2005Fair6 out of 10334896.1
March 2003Fair6 out of 10314596.1
February 2001Fair6 out of 10270096.2
March 1999Fair6 out of 10270096.2
February 1997Fair6 out of 10235096.3
March 1995Fair5 out of 10235085.2
April 1993Fair6 out of 10190096.4
March 1992Fair6 out of 10190094.4
January 1990Fair6 out of 10180093.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Culvertlinear ft.176088880