Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:29TH STREET, N.W. over C&O CANAL
Structure number:0006
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Local (Urban) [19]
Length of largest span:36.1 ft. [11.0 m]
Total length:36.1 ft. [11.0 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:32.2 ft. [9.8 m]
Vertical clearance below bridge:9.8 ft. [3.0 m]
Owner:State Highway Agency [01]
Year reconstructed:2013
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:Other [9]
Wearing surface:Bituminous [6]

Latest Available Inspection: November 2016 

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:1,000 [as of 2007]
Truck traffic:1% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Very Good [8 out of 9]
Structural appraisal:Equal to present desirable criteria [8]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
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:Navigation protection not required [1]
Scour condition:Bridge foundations (including piles) on dry land well above flood water elevations. [9]
Operating rating:44.9 tons [40.8 metric tons]
Inventory rating:36.0 tons [32.7 metric tons]
Sufficiency rating:79.9

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
November 201679.9GoodGoodVery GoodVery Good-1000
November 201479.9GoodVery GoodVery GoodVery Good-1000
December 201282.9GoodGoodGoodGood-1000
March 201023.6PoorSeriousPoorFair-1000
May 200825.1PoorSeriousPoorFair-500
June 200627.2PoorPoorPoorFair-500
June 200427.2PoorPoorPoorFair-500
August 200242.3PoorPoorFairFair-500
June 200042.3PoorPoorFairFair-500
April 199842.3PoorPoorFairFair-500
October 199642.1PoorPoorFairFair-500
April 199441.9PoorPoorFairFair-500
September 199241.9PoorPoorFairFair-500
February 199041.9PoorPoorFairFair-500