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US 29 over I-85

Map

Coordinates:
+35.16391, -81.45224
35°09'50" N, 81°27'08" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 29 over I-85
Structure number:000000000002917
Old structure number:001120002901100 (from 1992 edition)
Location:4.6 MI N OF BLACKSBURG
Purpose:Carries highway overpass over highway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:65.0 ft. [19.8 m]
Total length:250.0 ft. [76.2 m]
Roadway width between curbs:28.2 ft. [8.6 m]
Deck width edge-to-edge:33.5 ft. [10.2 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:30°
Owner:State Highway Agency [01]
Year built:1959
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Prestressed concrete [5]
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: November 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,400 [as of 2017]
Truck traffic:5% of total traffic
Deck condition:Excellent [9 out of 9]
Superstructure condition:Fair [5 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:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:71.5

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
November 2017FairExcellentFairSatisfactory240071.5
November 2015FairExcellentFairSatisfactory210072.5
November 2013FairExcellentFairSatisfactory250072.5
December 2011PoorPoorFairSatisfactory220069.5
November 2009PoorPoorFairSatisfactory260069.5
December 2007PoorPoorFairSatisfactory250069.5
December 2005PoorPoorFairSatisfactory290067.0
February 2000FairFairFairSatisfactory270069.5
January 1990PoorSatisfactoryPoorFair320452.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Prestressed Concrete Girder/Beamlinear ft.381381000
Deck
Reinforced Concrete Decksq. ft.657657000
Substructure
Reinforced Concrete Columneach1501500
Reinforced Concrete Pier Caplinear ft.5000500
Bearings
Movable Bearingeach3000300
Fixed Bearingeach1201200
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.152152000