US Bridges

I 495 SB over ST110 Amesbury RD

Poor

Essex County, Massachusetts · 3.7 KM N ST125 · Structure no. H120352WVDOTNBI

Built
1964
61 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
140 ft
3 main spans
Daily traffic
37,519
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over ST110 Amesbury RD is a steel stringer/multi-beam or girder carrying I 495 SB over ST110 Amesbury RD in Essex County, Massachusetts. It was built in 1964, so it is 61 years old, younger 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 37,519 vehicles a day, roughly 11% of them trucks, projected to reach 134,240 by 2031. The structure is 140 ft (42.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 495 SB
CrossesST110 Amesbury RD
Location3.7 KM N ST125
RouteInterstate 495
Coordinates42.80276, -71.05176
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.3 US tons
Inventory rating37.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length140 ft (42.8 m)
Longest span64 ft (19.5 m)
Deck width58 ft (17.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,519 (2019)
Projected traffic134,240 by 2031
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over ST110 Amesbury RD built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 495 SB over ST110 Amesbury RD 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 May 2024.

How much traffic does I 495 SB over ST110 Amesbury RD carry?

About 37,519 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is I 495 SB over ST110 Amesbury RD?

The structure is 140 ft (42.8 m) long with a longest span of 64 ft (19.5 m) and a deck 58 ft wide.

Who owns I 495 SB over ST110 Amesbury RD?

It is owned by the State Highway Agency.