US Bridges

I 495 over RR Mbta/Csx Qnb 20.82

Fair

Plymouth County, Massachusetts · CSX Track MP Qnb 20.82 · Structure no. M18050464DOTNBI

Built
1958
67 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
47,237
2022 count
Owner
State
State Highway Agency

About this bridge

I 495 over RR Mbta/Csx Qnb 20.82 is a steel stringer/multi-beam or girder carrying I 495 over RR Mbta/Csx Qnb 20.82 in Plymouth County, Massachusetts. It was built in 1958, so it is 67 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 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 47,237 vehicles a day, roughly 4% of them trucks, projected to reach 63,172 by 2032. The structure is 95 ft (29 m) long and 128 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI 495
CrossesRR Mbta/Csx Qnb 20.82
LocationCSX Track MP Qnb 20.82
RouteInterstate 495
CountyPlymouth County
StateMassachusetts
Coordinates41.8866, -70.93113
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating52.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length95 ft (29 m)
Longest span84 ft (25.6 m)
Deck width128 ft (38.9 m)
Roadway width124 ft (37.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,237 (2022)
Projected traffic63,172 by 2032
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 over RR Mbta/Csx Qnb 20.82 built?

It was built in 1958, making it 67 years old in 2025.

What condition is I 495 over RR Mbta/Csx Qnb 20.82 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 September 2023.

How much traffic does I 495 over RR Mbta/Csx Qnb 20.82 carry?

About 47,237 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is I 495 over RR Mbta/Csx Qnb 20.82?

The structure is 95 ft (29 m) long with a longest span of 84 ft (25.6 m) and a deck 128 ft wide.

Who owns I 495 over RR Mbta/Csx Qnb 20.82?

It is owned by the State Highway Agency.