US Bridges

I 495 NB over Water Concord River

Good

Middlesex County, Massachusetts · 3.2KM South of Rt 38 · Structure no. L15082AQCDOTNBI

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
1 main span
Daily traffic
61,200
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over Water Concord River is a steel stringer/multi-beam or girder carrying I 495 NB over Water Concord River in Middlesex County, Massachusetts. It was built in 2011, so it is 14 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 61,200 vehicles a day, roughly 5% of them trucks, projected to reach 181,620 by 2032. The structure is 187 ft (56.9 m) long and 58 ft wide.

Location

Open in Google Maps
CarriesI 495 NB
CrossesWater Concord River
Location3.2KM South of Rt 38
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.61597, -71.29583
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.8 US tons
Inventory rating44.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length187 ft (56.9 m)
Longest span180 ft (54.9 m)
Deck width58 ft (17.8 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,200 (2019)
Projected traffic181,620 by 2032
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$2.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 495 NB over Water Concord River built?

It was built in 2011, making it 14 years old in 2025.

What condition is I 495 NB over Water Concord River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does I 495 NB over Water Concord River carry?

About 61,200 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is I 495 NB over Water Concord River?

The structure is 187 ft (56.9 m) long with a longest span of 180 ft (54.9 m) and a deck 58 ft wide.

Who owns I 495 NB over Water Concord River?

It is owned by the State Highway Agency.