US Bridges

I 495 NB over Comb Bmrr & Little Riv

Poor

Essex County, Massachusetts · 1 MI N of ST-97 · Structure no. H120492WPDOTNBI

Built
1961
64 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
196 ft
2 main spans
Daily traffic
93,469
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over Comb Bmrr & Little Riv is a steel stringer/multi-beam or girder carrying I 495 NB over Comb Bmrr & Little Riv in Essex County, Massachusetts. It was built in 1961, so it is 64 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 93,469 vehicles a day, roughly 12% of them trucks, projected to reach 142,137 by 2032. The structure is 196 ft (59.7 m) long and 58 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesI 495 NB
CrossesComb Bmrr & Little Riv
Location1 MI N of ST-97
RouteInterstate 495
Coordinates42.79603, -71.10153
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating39.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length196 ft (59.7 m)
Longest span104 ft (31.7 m)
Deck width58 ft (17.6 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,469 (2019)
Projected traffic142,137 by 2032
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed4.3 mi (7 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$10.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over Comb Bmrr & Little Riv built?

It was built in 1961, making it 64 years old in 2025.

What condition is I 495 NB over Comb Bmrr & Little Riv in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does I 495 NB over Comb Bmrr & Little Riv carry?

About 93,469 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is I 495 NB over Comb Bmrr & Little Riv?

The structure is 196 ft (59.7 m) long with a longest span of 104 ft (31.7 m) and a deck 58 ft wide.

Who owns I 495 NB over Comb Bmrr & Little Riv?

It is owned by the State Highway Agency.