US Bridges

HWY Winthrop ST over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · 1.9 KM NW of JCT I93&SR16 · Structure no. M120133FYDOT634

Built
1984
41 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
20,172
2020 count
Owner
State
State Highway Agency

About this bridge

HWY Winthrop ST over RR Mbta/Bmrr is a prestressed concrete box beam or girders - multiple carrying HWY Winthrop ST over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1984, so it is 41 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 20,172 vehicles a day, roughly 4% of them trucks, projected to reach 26,374 by 2033. The structure is 43 ft (13.1 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Winthrop ST
CrossesRR Mbta/Bmrr
Location1.9 KM NW of JCT I93&SR16
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.41206, -71.12144
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span39 ft (11.9 m)
Deck width48 ft (14.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,172 (2020)
Projected traffic26,374 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Winthrop ST over RR Mbta/Bmrr built?

It was built in 1984, making it 41 years old in 2025.

What condition is HWY Winthrop ST over RR Mbta/Bmrr 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 January 2024.

How much traffic does HWY Winthrop ST over RR Mbta/Bmrr carry?

About 20,172 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is HWY Winthrop ST over RR Mbta/Bmrr?

The structure is 43 ft (13.1 m) long with a longest span of 39 ft (11.9 m) and a deck 48 ft wide.

Who owns HWY Winthrop ST over RR Mbta/Bmrr?

It is owned by the State Highway Agency.