US Bridges

I 90 over Water Muddy River

Fair

Suffolk County, Massachusetts · .2 MI Fenway Park S53 · Structure no. B163604T4DOTNBI

Built
1965
60 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
128,567
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Water Muddy River is a steel stringer/multi-beam or girder carrying I 90 over Water Muddy River in Suffolk County, Massachusetts. It was built in 1965, so it is 60 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 128,567 vehicles a day, roughly 5% of them trucks, projected to reach 160,550 by 2032. The structure is 65 ft (19.8 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI 90
CrossesWater Muddy River
Location.2 MI Fenway Park S53
RouteInterstate 90
CountySuffolk County
StateMassachusetts
Coordinates42.34785, -71.09189
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length65 ft (19.8 m)
Longest span60 ft (18.3 m)
Deck width56 ft (17.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic128,567 (2023)
Projected traffic160,550 by 2032
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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$3.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 over Water Muddy River built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 90 over Water Muddy 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 February 2023.

How much traffic does I 90 over Water Muddy River carry?

About 128,567 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I 90 over Water Muddy River?

The structure is 65 ft (19.8 m) long with a longest span of 60 ft (18.3 m) and a deck 56 ft wide.

Who owns I 90 over Water Muddy River?

It is owned by the State Highway Agency.