US Bridges

ST 30 Comm RD over I 90

Fair

Middlesex County, Massachusetts · I-90 Mm 117.2 · Structure no. N030364PQDOTNBI

Built
1957
68 years old, rebuilt 1993
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
288 ft
4 main spans
Daily traffic
21,700
2024 count
Owner
State
State Highway Agency

About this bridge

ST 30 Comm RD over I 90 is a steel stringer/multi-beam or girder carrying ST 30 Comm RD over I 90 in Middlesex County, Massachusetts. It was built in 1957 and reconstructed in 1993, 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 21,700 vehicles a day, roughly 5% of them trucks, projected to reach 23,690 by 2031. The structure is 288 ft (87.8 m) long and 59 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesST 30 Comm RD
CrossesI 90
LocationI-90 Mm 117.2
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.31127, -71.37429
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length288 ft (87.8 m)
Longest span96 ft (29.2 m)
Deck width59 ft (18 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,700 (2024)
Projected traffic23,690 by 2031
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.2 mi (10 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$15.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 30 Comm RD over I 90 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1993.

What condition is ST 30 Comm 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 30 Comm RD over I 90 carry?

About 21,700 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is ST 30 Comm RD over I 90?

The structure is 288 ft (87.8 m) long with a longest span of 96 ft (29.2 m) and a deck 59 ft wide.

Who owns ST 30 Comm RD over I 90?

It is owned by the State Highway Agency.