US Bridges

Trenton Road over Piney Run

Fair

Baltimore County, Maryland · 0.8 MI SW of Blackrock RD · Structure no. 200000B-0069010

Built
1970
55 years old, rebuilt 1989
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
1,050
2017 count
Owner
County
County Highway Agency

About this bridge

Trenton Road over Piney Run is a prestressed concrete box beam or girders - multiple carrying Trenton Road over Piney Run in Baltimore County, Maryland. It was built in 1970 and reconstructed in 1989, so it is 55 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 1,050 vehicles a day, roughly 5% of them trucks, projected to reach 1,691 by 2039. The structure is 34 ft (10.4 m) long and 16 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesTrenton Road
CrossesPiney Run
Location0.8 MI SW of Blackrock RD
RouteCounty Highway 162
CountyBaltimore County
StateMaryland
Coordinates39.57194, -76.82076
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88 US tons
Inventory rating53 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2017)
Projected traffic1,691 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Trenton Road over Piney Run built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1989.

What condition is Trenton Road over Piney Run 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 May 2023.

How much traffic does Trenton Road over Piney Run carry?

About 1,050 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Trenton Road over Piney Run?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 16 ft wide.

Who owns Trenton Road over Piney Run?

It is owned by the County Highway Agency.