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CHAIN BRIDGE over POTOMAC R. & C&O

Map

Coordinates:
+38.92954, -77.11730
38°55'46" N, 77°07'02" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:CHAIN BRIDGE over POTOMAC R. & C&O
Structure number:0001
Location:OVER POTOMAC RIVER, N.W.
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:171.9 ft. [52.4 m]
Total length:1382.9 ft. [421.5 m]
Roadway width between curbs:35.1 ft. [10.7 m]
Deck width edge-to-edge:44.6 ft. [13.6 m]
Vertical clearance below bridge:98.4 ft. [30.0 m]
Owner:State Highway Agency [01]
Year built:1937
Year reconstructed:1983
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [5]
Number of main spans:8
Main spans material:Steel continuous [4]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: February 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:21,800 [as of 2006]
Truck traffic:2% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:66.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
February 2018FairGoodGoodSatisfactory2180066.0
February 2016FairGoodGoodSatisfactory2180066.0
December 2013FairGoodGoodSatisfactory2180066.0
December 2011FairGoodSatisfactorySatisfactory2180065.0
January 2010FairGoodSatisfactorySatisfactory2180065.0
October 2007FairGoodSatisfactoryFair2180054.0
June 2006FairGoodSatisfactorySatisfactory2540066.0
May 2005FairGoodSatisfactorySatisfactory2540064.0
September 2004FairGoodSatisfactorySatisfactory2540064.0
March 2003FairGoodSatisfactoryGood2540064.0
July 1999GoodGoodGoodGood2540065.0
April 1997GoodGoodGoodGood2540065.0
December 1994GoodGoodGoodGood2540065.0
December 1992GoodGoodGoodGood2540065.0
April 1990GoodGoodGoodGood2540065.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.2,7032,57961180
Steel Protective Coatingsq. ft.105,835105,835000
Steel Stringerlinear ft.9,4659,4431210
Steel Protective Coatingsq. ft.59,63059,630000
Deck
Reinforced Concrete Decksq. ft.61,56061,443105120
Superstructure
Steel Floor Beamlinear ft.3,3343,30915100
Steel Protective Coatingsq. ft.5,9345,934000
Steel Pin or Pin & Hangar Assemblyeach64200
Steel Protective Coatingsq. ft.1010000
Substructure
Reinforced Concrete Pier Walllinear ft.4964663000
Reinforced Concrete Abutmentlinear ft.446252136580
Joints
Compression Jointlinear ft.1501153500
Assembly with Sealeach129129000
Bearings
Movable Bearingeach106400
Steel Protective Coatingsq. ft.100100000
Fixed Bearingeach81700
Steel Protective Coatingsq. ft.8080000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.4,3114,25720340
Steel Protective Coatingsq. ft.12,94412,939005
Reinforced Concrete Bridge Raillinear ft.1,3831,380210