US Bridges

US 40 over Stemmers Run

Fair

Baltimore County, Maryland · 0.39 Miles East of I-695 · Structure no. 100000030039010

Built
1935
90 years old, rebuilt 1996
Condition
Fair
inspected November 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
54,850
2009 count
Owner
State
State Highway Agency

About this bridge

US 40 over Stemmers Run is a prestressed concrete slab carrying US 40 over Stemmers Run in Baltimore County, Maryland. It was built in 1935 and reconstructed in 1996, 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 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 54,850 vehicles a day, roughly 8% of them trucks, projected to reach 62,527 by 2026. The structure is 41 ft (12.5 m) long and 126 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 40
CrossesStemmers Run
Location0.39 Miles East of I-695
RouteU.S. Route 40
CountyBaltimore County
StateMaryland
Coordinates39.33618, -76.48279
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width126 ft (38.5 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,850 (2009)
Projected traffic62,527 by 2026
Trucks8%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 40 over Stemmers Run built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1996.

What condition is US 40 over Stemmers 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 November 2024.

How much traffic does US 40 over Stemmers Run carry?

About 54,850 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 40 over Stemmers Run?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m) and a deck 126 ft wide.

Who owns US 40 over Stemmers Run?

It is owned by the State Highway Agency.