US Bridges

I 70 Ramp B (4) over Md 180

Fair

Frederick County, Maryland · I-70/MD 351 Interchange · Structure no. 100000100190010

Built
1996
29 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
1 main span
Daily traffic
12,602
2006 count
Owner
State
State Highway Agency

About this bridge

I 70 Ramp B (4) over Md 180 is a steel stringer/multi-beam or girder carrying I 70 Ramp B (4) over Md 180 in Frederick County, Maryland. It was built in 1996, so it is 29 years old, younger 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 12,602 vehicles a day, projected to reach 14,530 by 2026. The structure is 105 ft (32 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI 70 Ramp B (4)
CrossesMd 180
LocationI-70/MD 351 Interchange
RouteInterstate 70
CountyFrederick County
StateMaryland
Coordinates39.39769, -77.43759
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length105 ft (32 m)
Longest span100 ft (30.5 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,602 (2006)
Projected traffic14,530 by 2026
Trucks—
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 70 Ramp B (4) over Md 180 built?

It was built in 1996, making it 29 years old in 2025.

What condition is I 70 Ramp B (4) over Md 180 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 October 2023.

How much traffic does I 70 Ramp B (4) over Md 180 carry?

About 12,602 vehicles per day (2006 count).

How long is I 70 Ramp B (4) over Md 180?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.5 m) and a deck 43 ft wide.

Who owns I 70 Ramp B (4) over Md 180?

It is owned by the State Highway Agency.