US Bridges

Harpers Ferry Road over Antietam Creek

Fair

Washington County, Maryland · Antietam Md · Structure no. 200000W-5731010

Built
1832
193 years old, rebuilt 2010
Condition
Fair
inspected November 2023
Type
Arch - Deck
Masonry
Length
151 ft
4 main spans
Daily traffic
720
2023 count
Owner
County
County Highway Agency

About this bridge

Harpers Ferry Road over Antietam Creek is a masonry arch - deck carrying Harpers Ferry Road over Antietam Creek in Washington County, Maryland. It was built in 1832 and reconstructed in 2010, so it is 193 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 720 vehicles a day, roughly 5% of them trucks, projected to reach 1,070 by 2043. The structure is 151 ft (46 m) long and 19 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesHarpers Ferry Road
CrossesAntietam Creek
LocationAntietam Md
RouteCounty Highway 580
CountyWashington County
StateMaryland
Coordinates39.41722, -77.74211
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
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 inspectionNovember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating110.1 US tons
Inventory rating85 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans4
Design loadUnknown
Structure length151 ft (46 m)
Longest span36 ft (11 m)
Deck width19 ft (5.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2023)
Projected traffic1,070 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$10,000 (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Harpers Ferry Road over Antietam Creek built?

It was built in 1832, making it 193 years old in 2025. It was reconstructed in 2010.

What condition is Harpers Ferry Road 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 November 2023.

How much traffic does Harpers Ferry Road over Antietam Creek carry?

About 720 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Harpers Ferry Road over Antietam Creek?

The structure is 151 ft (46 m) long with a longest span of 36 ft (11 m) and a deck 19 ft wide.

Who owns Harpers Ferry Road over Antietam Creek?

It is owned by the County Highway Agency.