US Bridges

ST Marks Road over US 340

Fair

Frederick County, Maryland · 0.96 MI W of Md 180 · Structure no. 100000100117010

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
229 ft
4 main spans
Daily traffic
53
1994 count
Owner
State
State Highway Agency

About this bridge

ST Marks Road over US 340 is a steel stringer/multi-beam or girder carrying ST Marks Road over US 340 in Frederick County, Maryland. It was built in 1964, so it is 61 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 53 vehicles a day, roughly 8% of them trucks, projected to reach 61 by 2014. The structure is 229 ft (69.8 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesST Marks Road
CrossesUS 340
Location0.96 MI W of Md 180
RouteCounty Highway 272
CountyFrederick County
StateMaryland
Coordinates39.35458, -77.60049
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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length229 ft (69.8 m)
Longest span78 ft (23.8 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (1994)
Projected traffic61 by 2014
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST Marks Road over US 340 built?

It was built in 1964, making it 61 years old in 2025.

What condition is ST Marks Road over US 340 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 February 2024.

How much traffic does ST Marks Road over US 340 carry?

About 53 vehicles per day (1994 count), of which roughly 8% are trucks.

How long is ST Marks Road over US 340?

The structure is 229 ft (69.8 m) long with a longest span of 78 ft (23.8 m) and a deck 31 ft wide.

Who owns ST Marks Road over US 340?

It is owned by the State Highway Agency.