US Bridges

Thistle Road over Tributary to Patapsco Ri

FairPosted for load

Baltimore County, Maryland · 0.57 MI S of Md 144 · Structure no. 200000B-0177010

Built
1920
105 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
46 ft
2 main spans
Daily traffic
1,466
2024 count
Owner
County
County Highway Agency

About this bridge

Thistle Road over Tributary to Patapsco Ri is a concrete continuous tee beam carrying Thistle Road over Tributary to Patapsco Ri in Baltimore County, Maryland. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 1,466 vehicles a day, roughly 5% of them trucks, projected to reach 1,619 by 2044. The structure is 46 ft (13.9 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesThistle Road
CrossesTributary to Patapsco Ri
Location0.57 MI S of Md 144
RouteCounty Highway 2936
CountyBaltimore County
StateMaryland
Coordinates39.25767, -76.76511
Functional classUrban Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15 US tons
Inventory rating15 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length46 ft (13.9 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,466 (2024)
Projected traffic1,619 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Thistle Road over Tributary to Patapsco Ri built?

It was built in 1920, making it 105 years old in 2025.

What condition is Thistle Road over Tributary to Patapsco Ri 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 June 2024.

How much traffic does Thistle Road over Tributary to Patapsco Ri carry?

About 1,466 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Thistle Road over Tributary to Patapsco Ri?

The structure is 46 ft (13.9 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns Thistle Road over Tributary to Patapsco Ri?

It is owned by the County Highway Agency.