+38.86680, -104.86837
38°52'00" N, 104°52'06" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Structure number:CSG-D.97-10.95
Location:AT 31ST STREET
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Collector (Urban) [17]
Length of largest span:11.2 ft. [3.4 m]
Total length:24.3 ft. [7.4 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:58.4 ft. [17.8 m]
Skew angle:31°
Owner:City or Municipal Highway Agency [04]
Year built:1955
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel [3]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: March 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:727 [as of 2017]
Truck traffic:4% of total traffic
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Equal to present desirable criteria [8]
Water adequacy appraisal:Equal to present desirable criteria [8]
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:Large spalls, heavy scaling, wide cracks, considerable efflorescence or opened construction joint permitting loss of backfill. Considerable settlement or misalignment. Considerable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection throughout, extensive corrosion or deep pitting. [4]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:62.2

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
March 2018Poor4 out of 1072762.2
March 2016Poor4 out of 10201971.7
March 2014Poor4 out of 10201971.7
March 2012Poor4 out of 10235571.7
March 2010Poor4 out of 10235571.7
March 2008Fair5 out of 10281087.7
April 2006Fair5 out of 10281087.7
May 2004Poor4 out of 10281069.6
April 2002Fair6 out of 10323696.9
May 2000Fair5 out of 10323685.7
October 1999Fair5 out of 10323685.7
October 1998Fair5 out of 10323685.7
October 1996Fair6 out of 10228996.8
July 1994Fair6 out of 10228996.8
October 1992Fair6 out of 10228996.8
August 1990Fair6 out of 10291296.8

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Culvertlinear ft.1360341020
Steel Protective Coatingsq. ft.136001360
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.4842600
Steel Protective Coatingsq. ft.4843050