US Bridges

Is 70 Wbr over Patapsco River CSX Tran

Fair

Baltimore County, Maryland · On Howard CO Line · Structure no. 100000030229014

Built
1965
60 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
783 ft
3 main spans
Daily traffic
89,503
2021 count
Owner
State
State Highway Agency

About this bridge

Is 70 Wbr over Patapsco River CSX Tran is a steel continuous girder and floorbeam system carrying Is 70 Wbr over Patapsco River CSX Tran in Baltimore County, Maryland. It was built in 1965, so it is 60 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 89,503 vehicles a day, roughly 8% of them trucks, projected to reach 160,000 by 2039. The structure is 783 ft (238.7 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 70 Wbr
CrossesPatapsco River CSX Tran
LocationOn Howard CO Line
RouteInterstate 70
CountyBaltimore County
StateMaryland
Coordinates39.30419, -76.79772
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+3 approach)
Design loadHS 20
Structure length783 ft (238.7 m)
Longest span180 ft (54.9 m)
Deck width47 ft (14.3 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89,503 (2021)
Projected traffic160,000 by 2039
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$13.8 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 70 Wbr over Patapsco River CSX Tran built?

It was built in 1965, making it 60 years old in 2025.

What condition is Is 70 Wbr over Patapsco River CSX Tran in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Is 70 Wbr over Patapsco River CSX Tran carry?

About 89,503 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Is 70 Wbr over Patapsco River CSX Tran?

The structure is 783 ft (238.7 m) long with a longest span of 180 ft (54.9 m) and a deck 47 ft wide.

Who owns Is 70 Wbr over Patapsco River CSX Tran?

It is owned by the State Highway Agency.