US Bridges

I 95 SB/US1/ST128 over Water Neponset River

Fair

Norfolk County, Massachusetts · I 95AT South End of ST128 · Structure no. C020278FTDOTNBI

Built
2008
17 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
138 ft
1 main span
Daily traffic
80,679
2023 count
Owner
State
State Highway Agency

About this bridge

I 95 SB/US1/ST128 over Water Neponset River is a steel stringer/multi-beam or girder carrying I 95 SB/US1/ST128 over Water Neponset River in Norfolk County, Massachusetts. It was built in 2008, so it is 17 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 6 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 80,679 vehicles a day, roughly 6% of them trucks, projected to reach 266,270 by 2032. The structure is 138 ft (42.1 m) long and 85 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 95 SB/US1/ST128
CrossesWater Neponset River
LocationI 95AT South End of ST128
RouteInterstate 95
CountyNorfolk County
StateMassachusetts
Coordinates42.20996, -71.14457
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating109.5 US tons
Inventory rating65.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length138 ft (42.1 m)
Longest span131 ft (39.9 m)
Deck width85 ft (25.8 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80,679 (2023)
Projected traffic266,270 by 2032
Trucks6%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 95 SB/US1/ST128 over Water Neponset River built?

It was built in 2008, making it 17 years old in 2025.

What condition is I 95 SB/US1/ST128 over Water Neponset 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 July 2023.

How much traffic does I 95 SB/US1/ST128 over Water Neponset River carry?

About 80,679 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 95 SB/US1/ST128 over Water Neponset River?

The structure is 138 ft (42.1 m) long with a longest span of 131 ft (39.9 m) and a deck 85 ft wide.

Who owns I 95 SB/US1/ST128 over Water Neponset River?

It is owned by the State Highway Agency.