US Bridges

US 40 WB over Antietam Creek

Fair

Washington County, Maryland · At Eastern Boulevard · Structure no. 100000210014014

Built
1936
89 years old
Condition
Fair
inspected January 2024
Type
Arch - Deck
Concrete
Length
160 ft
3 main spans
Daily traffic
21,558
2023 count
Owner
State
State Highway Agency

About this bridge

US 40 WB over Antietam Creek is a concrete arch - deck carrying US 40 WB over Antietam Creek in Washington County, Maryland. It was built in 1936, so it is 89 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 21,558 vehicles a day, roughly 8% of them trucks, projected to reach 28,770 by 2045. The structure is 160 ft (48.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 40 WB
CrossesAntietam Creek
LocationAt Eastern Boulevard
RouteU.S. Route 40
Coordinates39.63116, -77.70121
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32.5 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length160 ft (48.8 m)
Longest span58 ft (17.7 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,558 (2023)
Projected traffic28,770 by 2045
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 WB over Antietam Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is US 40 WB over Antietam Creek 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 2024.

How much traffic does US 40 WB over Antietam Creek carry?

About 21,558 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 40 WB over Antietam Creek?

The structure is 160 ft (48.8 m) long with a longest span of 58 ft (17.7 m) and a deck 45 ft wide.

Who owns US 40 WB over Antietam Creek?

It is owned by the State Highway Agency.