US Bridges

I 90 WB over HWY Brooks ST

Fair

Suffolk County, Massachusetts · .16 KM S. Charles Rv S34 · Structure no. B160624TRDOTNBI

Built
1964
61 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
66,035
2024 count
Owner
State
State Highway Agency

About this bridge

I 90 WB over HWY Brooks ST is a steel stringer/multi-beam or girder carrying I 90 WB over HWY Brooks ST in Suffolk County, Massachusetts. It was built in 1964, so it is 61 years old, younger 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 66,035 vehicles a day, roughly 4% of them trucks, projected to reach 191,959 by 2031. The structure is 54 ft (16.5 m) long and 57 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI 90 WB
CrossesHWY Brooks ST
Location.16 KM S. Charles Rv S34
RouteInterstate 90
CountySuffolk County
StateMassachusetts
Coordinates42.35771, -71.162
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span49 ft (14.9 m)
Deck width57 ft (17.5 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic66,035 (2024)
Projected traffic191,959 by 2031
Trucks4%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a toll 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 WB over HWY Brooks ST built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 90 WB over HWY Brooks ST 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 I 90 WB over HWY Brooks ST carry?

About 66,035 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is I 90 WB over HWY Brooks ST?

The structure is 54 ft (16.5 m) long with a longest span of 49 ft (14.9 m) and a deck 57 ft wide.

Who owns I 90 WB over HWY Brooks ST?

It is owned by the State Highway Agency.