US Bridges

I 95 /ST128 over Water Charles River

Fair

Middlesex County, Massachusetts · Newton Weston Twn Line · Structure no. N120632FPDOTNBI

Built
1961
64 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
145 ft
3 main spans
Daily traffic
169,456
2023 count
Owner
State
State Highway Agency

About this bridge

I 95 /ST128 over Water Charles River is a steel stringer/multi-beam or girder carrying I 95 /ST128 over Water Charles River in Middlesex County, Massachusetts. It was built in 1961, so it is 64 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 169,456 vehicles a day, roughly 8% of them trucks, projected to reach 252,688 by 2031. The structure is 145 ft (44.3 m) long and 146 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesI 95 /ST128
CrossesWater Charles River
LocationNewton Weston Twn Line
RouteInterstate 95
Coordinates42.33683, -71.25863
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.2 US tons
Inventory rating34.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length145 ft (44.3 m)
Longest span79 ft (24.1 m)
Deck width146 ft (44.6 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic169,456 (2023)
Projected traffic252,688 by 2031
Trucks8%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$19.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 95 /ST128 over Water Charles River built?

It was built in 1961, making it 64 years old in 2025.

What condition is I 95 /ST128 over Water Charles 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 I 95 /ST128 over Water Charles River carry?

About 169,456 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is I 95 /ST128 over Water Charles River?

The structure is 145 ft (44.3 m) long with a longest span of 79 ft (24.1 m) and a deck 146 ft wide.

Who owns I 95 /ST128 over Water Charles River?

It is owned by the State Highway Agency.