US Bridges

HWY Mishawum RD over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · 1.6 KM W Rt 93 & Rt 128 · Structure no. W430042NYDOT634

Built
1977
48 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
1 main span
Daily traffic
35,560
2020 count
Owner
State
State Highway Agency

About this bridge

HWY Mishawum RD over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying HWY Mishawum RD over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1977, so it is 48 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 6 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 35,560 vehicles a day, roughly 10% of them trucks, projected to reach 48,958 by 2033. The structure is 66 ft (20.1 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Mishawum RD
CrossesRR Mbta/Bmrr
Location1.6 KM W Rt 93 & Rt 128
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.50352, -71.13717
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating58.9 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span60 ft (18.2 m)
Deck width63 ft (19.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,560 (2020)
Projected traffic48,958 by 2033
Trucks10%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$392,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mishawum RD over RR Mbta/Bmrr built?

It was built in 1977, making it 48 years old in 2025.

What condition is HWY Mishawum RD 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 Mishawum RD over RR Mbta/Bmrr carry?

About 35,560 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is HWY Mishawum RD over RR Mbta/Bmrr?

The structure is 66 ft (20.1 m) long with a longest span of 60 ft (18.2 m) and a deck 63 ft wide.

Who owns HWY Mishawum RD over RR Mbta/Bmrr?

It is owned by the State Highway Agency.