US Bridges

I 84 EB over ST 15 Mashapaug RD

Fair

Worcester County, Massachusetts · 4 MI South of US-20 · Structure no. S300371PJDOTNBI

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
184 ft
1 main span
Daily traffic
33,677
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 EB over ST 15 Mashapaug RD is a steel stringer/multi-beam or girder carrying I 84 EB over ST 15 Mashapaug RD in Worcester County, Massachusetts. It was built in 1970, so it is 55 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 5 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 33,677 vehicles a day, roughly 17% of them trucks, projected to reach 44,220 by 2032. The structure is 184 ft (56.1 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 84 EB
CrossesST 15 Mashapaug RD
Location4 MI South of US-20
RouteInterstate 84
CountyWorcester County
StateMassachusetts
Coordinates42.06948, -72.10178
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length184 ft (56.1 m)
Longest span178 ft (54.3 m)
Deck width58 ft (17.7 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,677 (2023)
Projected traffic44,220 by 2032
Trucks17%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$9.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 84 EB over ST 15 Mashapaug RD built?

It was built in 1970, making it 55 years old in 2025.

What condition is I 84 EB over ST 15 Mashapaug RD 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 September 2023.

How much traffic does I 84 EB over ST 15 Mashapaug RD carry?

About 33,677 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is I 84 EB over ST 15 Mashapaug RD?

The structure is 184 ft (56.1 m) long with a longest span of 178 ft (54.3 m) and a deck 58 ft wide.

Who owns I 84 EB over ST 15 Mashapaug RD?

It is owned by the State Highway Agency.