US Bridges

I 495 SB over Water Beaver Brook

Fair

Middlesex County, Massachusetts · Mm 79.5 · Structure no. L1302727QDOTNBI

Built
1962
63 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
49 ft
2 main spans
Daily traffic
64,006
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over Water Beaver Brook is a concrete continuous culvert carrying I 495 SB over Water Beaver Brook in Middlesex County, Massachusetts. It was built in 1962, so it is 63 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 64,006 vehicles a day, roughly 6% of them trucks, projected to reach 78,965 by 2031. The structure is 49 ft (14.9 m) long and 64 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesWater Beaver Brook
LocationMm 79.5
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.54346, -71.48979
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.3 US tons
Inventory rating31.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length49 ft (14.9 m)
Longest span22 ft (6.7 m)
Deck width64 ft (19.5 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,006 (2023)
Projected traffic78,965 by 2031
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 495 SB over Water Beaver Brook built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 495 SB over Water Beaver Brook 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 October 2024.

How much traffic does I 495 SB over Water Beaver Brook carry?

About 64,006 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 495 SB over Water Beaver Brook?

The structure is 49 ft (14.9 m) long with a longest span of 22 ft (6.7 m) and a deck 64 ft wide.

Who owns I 495 SB over Water Beaver Brook?

It is owned by the State Highway Agency.