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I-475 NBL over I-75

Map

Coordinates:
+32.95696, -83.81216
32°57'25" N, 83°48'44" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I-475 NBL over I-75
Structure number:000000020700550
Location:.5 MI E OF BOLINGBROKE
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:117.1 ft. [35.7 m]
Total length:335.0 ft. [102.1 m]
Roadway width between curbs:43.0 ft. [13.1 m]
Deck width edge-to-edge:46.3 ft. [14.1 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:55°
Owner:State Highway Agency [01]
Year built:1966
Year reconstructed:1985
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: October 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:39,820 [as of 2011]
Truck traffic:1% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:77.1
Estimated cost of work:$1,963,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2016FairSatisfactoryVery GoodSatisfactory3982077.1
October 2014GoodGoodVery GoodGood3982077.1
October 2012GoodGoodVery GoodGood3982077.1
October 2010GoodGoodVery GoodGood5945076.0
November 2008GoodGoodVery GoodGood5945076.0
October 2006GoodGoodVery GoodGood5489071.8
October 2004GoodGoodVery GoodGood5289071.9
November 2002FairSatisfactorySatisfactoryGood4060073.7
December 2000FairSatisfactorySatisfactoryGood3230074.2
December 1998FairSatisfactorySatisfactoryGood3230074.2
August 1996FairSatisfactorySatisfactoryGood3230094.5
October 1994FairSatisfactorySatisfactoryGood3230093.6
January 1993FairSatisfactorySatisfactoryGood3224093.6
March 1991FairGoodSatisfactorySatisfactory3224093.6

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.2,6802,680000
Steel Protective Coatingsq. ft.39,27739,277000
Deck
Reinforced Concrete Decksq. ft.15,4447,7177,72340
Substructure
Reinforced Concrete Columneach109010
Reinforced Concrete Abutmentlinear ft.3142942000
Reinforced Concrete Pier Caplinear ft.1941544000
Joints
Compression Jointlinear ft.300300000
Bearings
Movable Bearingeach2423100
Steel Protective Coatingsq. ft.4847001
Fixed Bearingeach2424000
Steel Protective Coatingsq. ft.4848000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.670670000