US Bridges

I 495 over Water Charles River

Fair

Norfolk County, Massachusetts · I-495 SB 45.2 Mm · Structure no. B060212ALDOTNBI

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
83,732
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 over Water Charles River is a concrete continuous culvert carrying I 495 over Water Charles River in Norfolk 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 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 83,732 vehicles a day, roughly 7% of them trucks, projected to reach 126,344 by 2031. The structure is 32 ft (9.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 495
CrossesWater Charles River
LocationI-495 SB 45.2 Mm
RouteInterstate 495
CountyNorfolk County
StateMassachusetts
Coordinates42.10749, -71.45824
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating89.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83,732 (2023)
Projected traffic126,344 by 2031
Trucks7%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 495 over Water Charles River built?

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

What condition is I 495 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 August 2024.

How much traffic does I 495 over Water Charles River carry?

About 83,732 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I 495 over Water Charles River?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m).

Who owns I 495 over Water Charles River?

It is owned by the State Highway Agency.