US Bridges

Ilchester Road over Patapsco River

Fair

Baltimore County, Maryland · 1.58 MI S of Md RTE 144 · Structure no. 200000B-0056010

Built
1955
70 years old, rebuilt 1980
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
186 ft
2 main spans
Daily traffic
2,052
2022 count
Owner
County
County Highway Agency

About this bridge

Ilchester Road over Patapsco River is a steel stringer/multi-beam or girder carrying Ilchester Road over Patapsco River in Baltimore County, Maryland. It was built in 1955 and reconstructed in 1980, so it is 70 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 5 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 2,052 vehicles a day, roughly 5% of them trucks, projected to reach 2,764 by 2042. The structure is 186 ft (56.7 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesIlchester Road
CrossesPatapsco River
Location1.58 MI S of Md RTE 144
RouteCounty Highway 2934
CountyBaltimore County
StateMaryland
Coordinates39.25127, -76.76376
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span90 ft (27.4 m)
Deck width34 ft (10.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,052 (2022)
Projected traffic2,764 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was Ilchester Road over Patapsco River built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1980.

What condition is Ilchester Road over Patapsco River 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 November 2023.

How much traffic does Ilchester Road over Patapsco River carry?

About 2,052 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Ilchester Road over Patapsco River?

The structure is 186 ft (56.7 m) long with a longest span of 90 ft (27.4 m) and a deck 34 ft wide.

Who owns Ilchester Road over Patapsco River?

It is owned by the County Highway Agency.