Route 646 NBL over IS 64


+37.35235, -76.73177
37°21'08" N, 76°43'54" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:Route 646 NBL over IS 64
Structure number:000000000019877
Location:0.26 Mi To Int Rte 602
Purpose:Carries highway over highway
Route classification:Major Collector (Rural) [07]
Length of largest span:129.9 ft. [39.6 m]
Total length:354.0 ft. [107.9 m]
Roadway width between curbs:49.9 ft. [15.2 m]
Deck width edge-to-edge:51.8 ft. [15.8 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:22°
Owner:State Highway Agency [01]
Year built:1979
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:4
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Epoxy Overlay [5]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:12,448 [as of 2014]
Truck traffic:1% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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:86.6

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018FairSatisfactorySatisfactoryFair1244886.6
June 2016FairSatisfactorySatisfactorySatisfactory1244897.8
June 2014FairSatisfactorySatisfactorySatisfactory467898.6
June 2012FairSatisfactorySatisfactorySatisfactory467898.6
July 2010FairGoodSatisfactorySatisfactory467898.6
September 2008FairGoodSatisfactorySatisfactory467898.6
August 2006GoodGoodGoodGood397598.6
July 2004FairSatisfactoryGoodGood326898.7
July 2002FairSatisfactoryGoodGood310398.7
July 2000FairSatisfactoryGoodGood499298.5
July 1998FairSatisfactoryVery GoodGood499298.5
May 1997FairFairVery GoodGood485397.5
June 1995FairFairVery GoodGood485397.6
June 1993FairSatisfactorySatisfactoryGood427398.7
July 1991FairVery GoodSatisfactoryGood408399.7

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.2,1241,90921500
Steel Protective Coatingsq. ft.20,00019,47500525
Reinforced Concrete Decksq. ft.18,40818,29611200
Wearing Surfacessq. ft.18,40817,066001,342
Reinforced Concrete Columneach98100
Reinforced Concrete Abutmentlinear ft.114793500
Reinforced Concrete Pier Caplinear ft.1595910000
Pourable Jointlinear ft.26016226072
Movable Bearingeach2402400
Steel Protective Coatingsq. ft.2400024
Fixed Bearingeach2402400
Steel Protective Coatingsq. ft.2400024
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.70860810000