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31ST STREET N.W. over C&O CANAL

Map

Coordinates:
+38.90434, -77.06279
38°54'16" N, 77°03'46" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:31ST STREET N.W. over C&O CANAL
Structure number:0003
Location:GEORGETOWN & C&O
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Local (Urban) [19]
Length of largest span:20.0 ft. [6.1 m]
Total length:39.7 ft. [12.1 m]
Roadway width between curbs:33.1 ft. [10.1 m]
Deck width edge-to-edge:48.6 ft. [14.8 m]
Vertical clearance below bridge:9.8 ft. [3.0 m]
Owner:State Highway Agency [01]
Year reconstructed:1929
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Number of main spans:2
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: December 2017

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:1,000 [as of 2007]
Truck traffic:1% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Serious [3 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Pier/abutment protection:In place and functioning [2]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:40.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017PoorPoorPoorSerious100040.0
December 2016PoorPoorPoorSerious100040.0
November 2015PoorPoorPoorSerious100040.0
November 2014PoorPoorPoorPoor100055.1
October 2013PoorPoorPoorPoor100055.1
November 2012PoorCriticalPoorPoor100053.1
February 2012PoorCriticalPoorSerious100038.0
February 2011PoorSeriousPoorSerious100038.0
March 2009PoorSeriousPoorSerious100038.0
March 2007PoorFairFairPoor50039.8
June 2004PoorVery GoodPoorFair50040.9
August 2002PoorCriticalCriticalPoor50035.8
June 2000PoorSeriousSeriousFair50047.9
May 1998PoorSeriousSeriousFair50047.9
October 1996PoorSeriousSeriousFair50035.8
April 1994PoorSeriousPoorFair50041.1
November 1992PoorSeriousPoorFair50041.1
February 1990FairFairFairFair50057.2

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.800118060280
Steel Protective Coatingsq. ft.1,280812001,152
Deck
Reinforced Concrete Decksq. ft.1,934001,9340
Wearing Surfacessq. ft.1,2061,08181440
Substructure
Steel Columneach50014
Steel Protective Coatingsq. ft.150000150
Masonry Abutmentlinear ft.102465600
Steel Pier Caplinear ft.51041100
Steel Protective Coatingsq. ft.102000102
Reinforced Concrete Pier Caplinear ft.90540
Joints
Pourable Jointlinear ft.4000040
Bearings
Movable Bearingeach2800262
Steel Protective Coatingsq. ft.50005
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.80063170
Steel Protective Coatingsq. ft.456045042