MD 175 EB over US 29


+39.22550, -76.84533
39°13'32" N, 76°50'43" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:MD 175 EB over US 29
Structure number:100000130086013
Location:4.06 MILES N OF MD 108
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:96.1 ft. [29.3 m]
Total length:268.1 ft. [81.7 m]
Roadway width between curbs:46.9 ft. [14.3 m]
Deck width edge-to-edge:50.2 ft. [15.3 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1974
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel continuous [4]
Main spans 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: January 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:47,121 [as of 2009]
Truck traffic:8% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:83.9

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
January 2018FairSatisfactoryFairSatisfactory4712183.9
January 2016FairSatisfactoryFairSatisfactory4712183.9
April 2014FairSatisfactoryFairSatisfactory4712183.9
February 2012FairSatisfactoryFairSatisfactory4712183.9
August 2009PoorPoorFairSatisfactory2345183.4
May 2007PoorPoorFairSatisfactory2338883.4
May 2005FairFairFairSatisfactory2338885.5
May 2003FairSatisfactorySatisfactorySatisfactory2338897.8
April 2001FairSatisfactorySatisfactoryGood110099.9
March 1999FairSatisfactorySatisfactoryGood110099.9
March 1997FairSatisfactorySatisfactoryGood110099.9

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,8481,63302150
Steel Protective Coatingsq. ft.16,13916,139000
Reinforced Concrete Decksq. ft.13,44611,5531,883100
Wearing Surfacessq. ft.12,59612,5336300
Reinforced Concrete Columneach98100
Reinforced Concrete Abutmentlinear ft.10092620
Reinforced Concrete Pier Caplinear ft.1442012130
Compression Jointlinear ft.20012655190
Elastomeric Bearingeach3532300
Steel Protective Coatingsq. ft.8077300
Movable Bearingeach1413100
Steel Protective Coatingsq. ft.3533200
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.5905761040