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MD 4 over PATUXENT RIVER & TOWN CR

Map

Coordinates:
+38.31859, -76.48491
38°19'07" N, 76°29'06" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:MD 4 over PATUXENT RIVER & TOWN CR
Structure number:100000040019010
Location:ON ST MARYS CO LINE
Purpose:Carries highway over highway and waterway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:451.1 ft. [137.5 m]
Total length:7207.4 ft. [2196.7 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:31.2 ft. [9.5 m]
Vertical clearance below bridge:137.8 ft. [42.0 m]
Owner:State Highway Agency [01]
Year built:1977
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:59
Main spans material:Prestressed concrete [5]
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: March 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:26,962 [as of 2010]
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:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Superior to present desirable criteria [9]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
Channel protection:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:None present but re-evaluation suggested [5]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:43.5
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$14,841,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2016FairSatisfactoryFairSatisfactory2696243.5
December 2013FairSatisfactoryFairSatisfactory2696244.3
November 2011FairSatisfactoryFairSatisfactory2696256.9
November 2009FairSatisfactorySatisfactorySatisfactory2506767.9
September 2007FairSatisfactorySatisfactorySatisfactory2368967.9
January 2006FairSatisfactorySatisfactorySatisfactory2368967.9
November 2003FairSatisfactorySatisfactorySatisfactory2368967.9
September 2001FairSatisfactoryGoodSatisfactory1668667.9
August 1999FairSatisfactorySatisfactorySatisfactory1668667.9
August 1997FairSatisfactorySatisfactorySatisfactory1668667.9
September 1995FairSatisfactoryFairSatisfactory1050056.9
September 1993FairSatisfactoryFairSatisfactory1050056.9
September 1991FairSatisfactoryFairSatisfactory1050056.9

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.17,26016,307863900
Steel Protective Coatingsq. ft.336,398319,57616,82002
Prestressed Concrete Girder/Beamlinear ft.6,9006,83047230
Steel Stringerlinear ft.4,6604,42723300
Steel Protective Coatingsq. ft.26,52125,85866300
Deck
Reinforced Concrete Decksq. ft.224,85944,846179,8871260
Superstructure
Steel Floor Beamlinear ft.2,5522,404128200
Steel Protective Coatingsq. ft.24,62224,00661600
Substructure
Reinforced Concrete Columneach45341100
Reinforced Concrete Pier Walllinear ft.55542595350
Reinforced Concrete Abutmentlinear ft.5852600
Prestressed Concrete Pileeach3270250
Reinforced Concrete Pier Caplinear ft.1,65301,64850
Joints
Compression Jointlinear ft.286028600
Assembly with Sealeach3640332320
Bearings
Elastomeric Bearingeach92064280
Movable Bearingeach126012060
Steel Protective Coatingsq. ft.1,4651,31814700
Fixed Bearingeach7407400
Steel Protective Coatingsq. ft.6686016700
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.14,46010,9763,451330