US Bridges

St. Marks Road over Broad Run

GoodPosted for load

Frederick County, Maryland · 0.7 Miles South of Md 383 · Structure no. 200000F-1202010

Built
1900
125 years old, rebuilt 2009
Condition
Good
inspected September 2024
Type
Truss - Thru
Steel
Length
73 ft
1 main span
Daily traffic
196
2024 count
Owner
County
County Highway Agency

About this bridge

St. Marks Road over Broad Run is a steel truss - thru carrying St. Marks Road over Broad Run in Frederick County, Maryland. It was built in 1900 and reconstructed in 2009, so it is 125 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 196 vehicles a day, roughly 5% of them trucks, projected to reach 250 by 2044. The structure is 73 ft (22.3 m) long and 12 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSt. Marks Road
CrossesBroad Run
Location0.7 Miles South of Md 383
RouteCounty Highway 272
CountyFrederick County
StateMaryland
Coordinates39.36673, -77.58652
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating16.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length73 ft (22.3 m)
Longest span72 ft (21.9 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic196 (2024)
Projected traffic250 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was St. Marks Road over Broad Run built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2009.

What condition is St. Marks Road over Broad Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does St. Marks Road over Broad Run carry?

About 196 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is St. Marks Road over Broad Run?

The structure is 73 ft (22.3 m) long with a longest span of 72 ft (21.9 m) and a deck 12 ft wide.

Who owns St. Marks Road over Broad Run?

It is owned by the County Highway Agency.