US Bridges

US 40 over Whitemarsh Run

Fair

Baltimore County, Maryland · 0.67 Mile West of Md 43 · Structure no. 100000030037010

Built
1935
90 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
29,100
2009 count
Owner
State
State Highway Agency

About this bridge

US 40 over Whitemarsh Run is a concrete tee beam carrying US 40 over Whitemarsh Run in Baltimore County, Maryland. It was built in 1935, so it is 90 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 29,100 vehicles a day, roughly 8% of them trucks, projected to reach 33,829 by 2026. The structure is 31 ft (9.4 m) long and 84 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 40
CrossesWhitemarsh Run
Location0.67 Mile West of Md 43
RouteU.S. Route 40
CountyBaltimore County
StateMaryland
Coordinates39.36599, -76.43963
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width84 ft (25.5 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,100 (2009)
Projected traffic33,829 by 2026
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$172,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 over Whitemarsh Run built?

It was built in 1935, making it 90 years old in 2025.

What condition is US 40 over Whitemarsh 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 January 2025.

How much traffic does US 40 over Whitemarsh Run carry?

About 29,100 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 40 over Whitemarsh Run?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 84 ft wide.

Who owns US 40 over Whitemarsh Run?

It is owned by the State Highway Agency.