US Bridges

Mt Zion Road over US 15/US 340

Fair

Frederick County, Maryland · 1.55 MI N of US 340 · Structure no. 100000100150010

Built
1968
57 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
214 ft
4 main spans
Daily traffic
5,420
2009 count
Owner
State
State Highway Agency

About this bridge

Mt Zion Road over US 15/US 340 is a steel stringer/multi-beam or girder carrying Mt Zion Road over US 15/US 340 in Frederick County, Maryland. It was built in 1968, so it is 57 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 5,420 vehicles a day, roughly 5% of them trucks, projected to reach 8,130 by 2029. The structure is 214 ft (65.2 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMt Zion Road
CrossesUS 15/US 340
Location1.55 MI N of US 340
RouteCounty Highway 229
CountyFrederick County
StateMaryland
Coordinates39.37675, -77.47565
Functional classUrban Collector

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.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.9 US tons
Inventory rating46.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length214 ft (65.2 m)
Longest span73 ft (22.3 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,420 (2009)
Projected traffic8,130 by 2029
Trucks5%
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 Mt Zion Road over US 15/US 340 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Mt Zion Road over US 15/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 May 2024.

How much traffic does Mt Zion Road over US 15/US 340 carry?

About 5,420 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Mt Zion Road over US 15/US 340?

The structure is 214 ft (65.2 m) long with a longest span of 73 ft (22.3 m) and a deck 35 ft wide.

Who owns Mt Zion Road over US 15/US 340?

It is owned by the State Highway Agency.