ROUTE 29 over C&O CANAL, N.W.


+38.90500, -77.07000
38°54'18" N, 77°04'12" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ROUTE 29 over C&O CANAL, N.W.
Structure number:0032(TO KEY BR)
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:94.2 ft. [28.7 m]
Total length:94.2 ft. [28.7 m]
Roadway width between curbs:57.1 ft. [17.4 m]
Deck width edge-to-edge:67.9 ft. [20.7 m]
Vertical clearance below bridge:9.8 ft. [3.0 m]
Skew angle:62°
Owner:State Highway Agency [01]
Year built:1998
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span 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: September 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:31,200 [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:Equal to present minimum criteria [6]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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]
Scour condition:Bridge foundations (including piles) on dry land well above flood water elevations. [9]
Operating rating:73.8 tons [67.1 metric tons]
Inventory rating:44.9 tons [40.8 metric tons]
Sufficiency rating:99.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
September 201599.0FairGoodGoodSatisfactory-31200
September 201380.0FairGoodGoodSatisfactoryFO31200
September 201180.0GoodGoodGoodExcellentFO12500
September 200980.0FairGoodGoodSatisfactoryFO12500
June 200780.0GoodGoodGoodGoodFO10500
November 200580.0GoodVery GoodGoodGood-10500
June 200380.0GoodVery GoodVery GoodVery Good-10500
March 200180.0GoodExcellentVery GoodVery Good-10500
March 199646.1PoorPoorPoorFairSD10500
March 199369.1PoorPoorSatisfactorySatisfactorySD10500
November 198869.1PoorPoorSatisfactorySatisfactorySD10500

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.876875100
Steel Protective Coatingsq. ft.5,2565,256000
Reinforced Concrete Girder/Beamlinear ft.600593520
Reinforced Concrete Decksq. ft.6,4006,3554500
Reinforced Concrete Floor Beamlinear ft.320320000
Reinforced Concrete Columneach66000
Reinforced Concrete Abutmentlinear ft.13810118190
Concrete Protective Coatingsq. ft.552552000
Strip Seal Jointlinear ft.136013600
Movable Bearingeach107300
Steel Protective Coatingsq. ft.54100
Fixed Bearingeach108200
Steel Protective Coatingsq. ft.54100
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.94588280
Reinforced Concrete Bridge Raillinear ft.2822681400