US Bridges

ST 9 Worcester RD over I 90

Fair

Middlesex County, Massachusetts · .5 MI W of Mdc Res · Structure no. F070504PLDOTNBI

Built
1957
68 years old, rebuilt 1995
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
333 ft
4 main spans
Daily traffic
37,124
2022 count
Owner
State
State Highway Agency

About this bridge

ST 9 Worcester RD over I 90 is a steel continuous stringer/multi-beam or girder carrying ST 9 Worcester RD over I 90 in Middlesex County, Massachusetts. It was built in 1957 and reconstructed in 1995, so it is 68 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 37,124 vehicles a day, roughly 6% of them trucks, projected to reach 86,862 by 2031. The structure is 333 ft (101.5 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 9 Worcester RD
CrossesI 90
Location.5 MI W of Mdc Res
RouteState Highway 9
CountyMiddlesex County
StateMassachusetts
Coordinates42.29681, -71.47866
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length333 ft (101.5 m)
Longest span110 ft (33.5 m)
Deck width102 ft (31 m)
Roadway width85 ft (25.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,124 (2022)
Projected traffic86,862 by 2031
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$30.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 9 Worcester RD over I 90 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1995.

What condition is ST 9 Worcester RD over I 90 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 2024.

How much traffic does ST 9 Worcester RD over I 90 carry?

About 37,124 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is ST 9 Worcester RD over I 90?

The structure is 333 ft (101.5 m) long with a longest span of 110 ft (33.5 m) and a deck 102 ft wide.

Who owns ST 9 Worcester RD over I 90?

It is owned by the State Highway Agency.