US Bridges

Md 180 over Is 70

Fair

Frederick County, Maryland · 0.49 Mile West of US 15 · Structure no. 100000100144010

Built
1968
57 years old, rebuilt 1976
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
276 ft
2 main spans
Daily traffic
3,850
2009 count
Owner
State
State Highway Agency

About this bridge

Md 180 over Is 70 is a steel continuous stringer/multi-beam or girder carrying Md 180 over Is 70 in Frederick County, Maryland. It was built in 1968 and reconstructed in 1976, 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 3,850 vehicles a day, roughly 8% of them trucks, projected to reach 4,635 by 2026. The structure is 276 ft (84.1 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesMd 180
CrossesIs 70
Location0.49 Mile West of US 15
RouteState Highway 180
CountyFrederick County
StateMaryland
Coordinates39.40171, -77.44706
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 inspectionMarch 2023
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 rating97 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length276 ft (84.1 m)
Longest span135 ft (41.1 m)
Deck width39 ft (11.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,850 (2009)
Projected traffic4,635 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed9.9 mi (16 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 Md 180 over Is 70 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1976.

What condition is Md 180 over Is 70 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 March 2023.

How much traffic does Md 180 over Is 70 carry?

About 3,850 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 180 over Is 70?

The structure is 276 ft (84.1 m) long with a longest span of 135 ft (41.1 m) and a deck 39 ft wide.

Who owns Md 180 over Is 70?

It is owned by the State Highway Agency.