US Bridges

I 495 SB over ST109 Medway RD

Poor

Worcester County, Massachusetts · Mm 48.6 · Structure no. M210221UEDOTNBI

Built
1968
57 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
141 ft
2 main spans
Daily traffic
51,812
2024 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over ST109 Medway RD is a steel stringer/multi-beam or girder carrying I 495 SB over ST109 Medway RD in Worcester County, Massachusetts. It was built in 1968, so it is 57 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.

It carries about 51,812 vehicles a day, roughly 9% of them trucks, projected to reach 63,488 by 2031. The structure is 141 ft (43 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesST109 Medway RD
LocationMm 48.6
RouteInterstate 495
CountyWorcester County
StateMassachusetts
Coordinates42.14754, -71.48473
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
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 rating54.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length141 ft (43 m)
Longest span67 ft (20.4 m)
Deck width56 ft (17.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,812 (2024)
Projected traffic63,488 by 2031
Trucks9%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$13.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over ST109 Medway RD built?

It was built in 1968, making it 57 years old in 2025.

What condition is I 495 SB over ST109 Medway 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 July 2024.

How much traffic does I 495 SB over ST109 Medway RD carry?

About 51,812 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I 495 SB over ST109 Medway RD?

The structure is 141 ft (43 m) long with a longest span of 67 ft (20.4 m) and a deck 56 ft wide.

Who owns I 495 SB over ST109 Medway RD?

It is owned by the State Highway Agency.