Route 646 SBL over IS 64


+37.35251, -76.73195
37°21'09" N, 76°43'55" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:Route 646 SBL over IS 64
Structure number:000000000019879
Location:1.52 Mi To Rte 60
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other (Rural) [02]
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:21°
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 2016FairSatisfactorySatisfactorySatisfactory1244896.8
June 2014FairSatisfactorySatisfactorySatisfactory467898.6
June 2012FairSatisfactorySatisfactorySatisfactory467898.6
June 2010FairSatisfactorySatisfactorySatisfactory467898.6
September 2008FairSatisfactoryGoodGood467898.6
June 2006FairSatisfactoryGoodGood397598.6
June 2004FairSatisfactoryGoodGood326898.7
June 2002FairSatisfactoryGoodGood310398.7
July 2000FairSatisfactoryGoodGood499298.5
July 1998FairSatisfactoryVery GoodVery Good499298.5
July 1996GoodVery GoodVery GoodVery Good485398.5
June 1994FairFairSatisfactoryGood854797.3
June 1993FairSatisfactorySatisfactoryVery Good427398.7
July 1991FairFairSatisfactoryVery Good408398.7

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.2,1241,59952500
Steel Protective Coatingsq. ft.20,00019,47552500
Reinforced Concrete Decksq. ft.18,40815,74710602,555
Wearing Surfacessq. ft.17,70015,145002,555
Reinforced Concrete Columneach99000
Reinforced Concrete Abutmentlinear ft.114753900
Reinforced Concrete Pier Caplinear ft.1591233600
Pourable Jointlinear ft.2602223008
Movable Bearingeach2402400
Steel Protective Coatingsq. ft.2400024
Fixed Bearingeach2402400
Steel Protective Coatingsq. ft.2400024
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.71261210000
Concrete Protective Coatingsq. ft.1,4161,16600250