US Bridges

Md 90 over ST Martin River

Fair

Worcester County, Maryland · 2.8 Miles East of Md 589 · Structure no. 100000230020010

Built
1970
55 years old, rebuilt 2004
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
4,130 ft
3 main spans
Daily traffic
31,551
2023 count
Owner
State
State Highway Agency

About this bridge

Md 90 over ST Martin River is a prestressed concrete stringer/multi-beam or girder carrying Md 90 over ST Martin River in Worcester County, Maryland. It was built in 1970 and reconstructed in 2004, so it is 55 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 31,551 vehicles a day, roughly 8% of them trucks, projected to reach 39,280 by 2045. The structure is 4,130 ft (1,258.8 m) long and 41 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesMd 90
CrossesST Martin River
Location2.8 Miles East of Md 589
RouteState Highway 90
CountyWorcester County
StateMaryland
Coordinates38.38937, -75.12826
Functional classUrban Other Principal Arterial

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.5 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+67 approach)
Design loadHS 20
Structure length4,130 ft (1,258.8 m)
Longest span130 ft (39.6 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,551 (2023)
Projected traffic39,280 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$11.3 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Md 90 over ST Martin River built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2004.

What condition is Md 90 over ST Martin River 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 November 2024.

How much traffic does Md 90 over ST Martin River carry?

About 31,551 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Md 90 over ST Martin River?

The structure is 4,130 ft (1,258.8 m) long with a longest span of 130 ft (39.6 m) and a deck 41 ft wide.

Who owns Md 90 over ST Martin River?

It is owned by the State Highway Agency.