US Bridges

Keedysville Road over Antietam Creek

FairPosted for load

Washington County, Maryland · 0.8 MI NW of Md RTE 34 · Structure no. 200000W-5651010

Built
1830
195 years old, rebuilt 1980
Condition
Fair
inspected November 2023
Type
Arch - Deck
Masonry
Length
105 ft
3 main spans
Daily traffic
1,173
2015 count
Owner
County
County Highway Agency

About this bridge

Keedysville Road over Antietam Creek is a masonry arch - deck carrying Keedysville Road over Antietam Creek in Washington County, Maryland. It was built in 1830 and reconstructed in 1980, so it is 195 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. Its operating status is: posted for load restriction.

It carries about 1,173 vehicles a day, roughly 5% of them trucks, projected to reach 1,617 by 2037. The structure is 105 ft (32 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesKeedysville Road
CrossesAntietam Creek
Location0.8 MI NW of Md RTE 34
RouteCounty Highway 565
Coordinates39.48797, -77.71404
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating15 US tons
Inventory rating15 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans3
Design loadUnknown
Structure length105 ft (32 m)
Longest span33 ft (10.1 m)
Deck width20 ft (6.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,173 (2015)
Projected traffic1,617 by 2037
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$42,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Keedysville Road over Antietam Creek built?

It was built in 1830, making it 195 years old in 2025. It was reconstructed in 1980.

What condition is Keedysville 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 Keedysville Road over Antietam Creek carry?

About 1,173 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Keedysville Road over Antietam Creek?

The structure is 105 ft (32 m) long with a longest span of 33 ft (10.1 m) and a deck 20 ft wide.

Who owns Keedysville Road over Antietam Creek?

It is owned by the County Highway Agency.