I-20 WBL over SR 15


+33.54588, -83.09638
33°32'45" N, 83°05'47" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I-20 WBL over SR 15
Structure number:000000013300290
Location:1 MI NW OF SILOAM
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:65.0 ft. [19.8 m]
Total length:187.0 ft. [57.0 m]
Roadway width between curbs:39.0 ft. [11.9 m]
Deck width edge-to-edge:40.4 ft. [12.3 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:34°
Owner:State Highway Agency [01]
Year built:1968
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:3
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: May 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:27,290 [as of 2011]
Truck traffic:1% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:92.2
Estimated cost of work:$1,096,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2016FairSatisfactorySatisfactorySatisfactory2729092.2
May 2014FairSatisfactorySatisfactorySatisfactory2729092.2
May 2012FairSatisfactorySatisfactorySatisfactory2729093.3
May 2010FairSatisfactorySatisfactorySatisfactory2510093.4
May 2008FairSatisfactorySatisfactorySatisfactory2510093.4
May 2006FairSatisfactorySatisfactorySatisfactory2497091.7
April 2004FairSatisfactorySatisfactorySatisfactory2430091.7
May 2002FairSatisfactorySatisfactorySatisfactory3150091.4
May 2000FairSatisfactoryGoodSatisfactory1820095.1
May 1998FairSatisfactorySatisfactorySatisfactory1820095.1
May 1996FairSatisfactoryGoodSatisfactory1820095.1
September 1994FairSatisfactorySatisfactorySatisfactory1820094.6
December 1992FairSatisfactorySatisfactorySatisfactory1803094.6
April 1991FairGoodSatisfactorySatisfactory1803094.6

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,1221,1022000
Steel Protective Coatingsq. ft.9,8339,833000
Reinforced Concrete Decksq. ft.7,5187,05146700
Reinforced Concrete Columneach66000
Reinforced Concrete Abutmentlinear ft.88682000
Reinforced Concrete Pier Caplinear ft.80602000
Compression Jointlinear ft.156001560
Movable Bearingeach1818000
Steel Protective Coatingsq. ft.3636000
Fixed Bearingeach1818000
Steel Protective Coatingsq. ft.3636000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.374374000
Reinforced Concrete Bridge Raillinear ft.3742977700