Share:

IS 270 over MIDDLEBROOK ROAD

Map

Coordinates:
+39.17518, -77.24675
39°10'31" N, 77°14'48" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IS 270 over MIDDLEBROOK ROAD
Structure number:100000150042010
Location:0.77 MILE SOUTH OF MD 118
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:140.1 ft. [42.7 m]
Total length:145.0 ft. [44.2 m]
Roadway width between curbs:129.9 ft. [39.6 m]
Deck width edge-to-edge:133.9 ft. [40.8 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:14°
Owner:State Highway Agency [01]
Year built:1991
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
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: June 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:133,720 [as of 2009]
Truck traffic:8% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
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:83.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2017FairGoodSatisfactorySatisfactory13372083.0
July 2015FairGoodSatisfactorySatisfactory13372083.0
July 2013FairGoodSatisfactorySatisfactory13372083.0
June 2011FairGoodGoodSatisfactory13372083.0
June 2009FairGoodGoodSatisfactory1308191.0
June 2007FairGoodGoodSatisfactory11917583.0
August 2005FairGoodGoodSatisfactory11917583.0
August 2003FairGoodGoodSatisfactory11917581.0
August 2001GoodGoodGoodGood8162581.0
August 1999GoodGoodGoodGood8162581.0
October 1997GoodGoodGoodGood8162581.0
October 1995GoodGoodGoodGood10825081.0
October 1993GoodGoodGoodGood10825081.0
October 1991GoodGoodGoodGood-96.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.2,4652,26520000
Steel Protective Coatingsq. ft.37,65037,510100400
Deck
Reinforced Concrete Decksq. ft.19,43019,4201000
Substructure
Reinforced Concrete Abutmentlinear ft.2832671600
Joints
Compression Jointlinear ft.26816610020
Bearings
Movable Bearingeach1701340
Steel Protective Coatingsq. ft.70502000
Fixed Bearingeach1701700
Steel Protective Coatingsq. ft.59421700
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.4544163440