US Bridges

HWY S Union ST over RR Mbta/Bmrr

Fair

Essex County, Massachusetts · .64 KM N I495 · Structure no. L0402232CDOT634

Built
1995
30 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
118 ft
1 main span
Daily traffic
17,500
2024 count
Owner
State
State Highway Agency

About this bridge

HWY S Union ST over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying HWY S Union ST over RR Mbta/Bmrr in Essex County, Massachusetts. It was built in 1995, so it is 30 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 17,500 vehicles a day, roughly 8% of them trucks, projected to reach 16,267 by 2031. The structure is 118 ft (36 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY S Union ST
CrossesRR Mbta/Bmrr
Location.64 KM N I495
RouteState Highway 0
CountyEssex County
StateMassachusetts
Coordinates42.68451, -71.15261
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72 US tons
Inventory rating43.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length118 ft (36 m)
Longest span114 ft (34.7 m)
Deck width59 ft (18 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2024)
Projected traffic16,267 by 2031
Trucks8%
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$1.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY S Union ST over RR Mbta/Bmrr built?

It was built in 1995, making it 30 years old in 2025.

What condition is HWY S Union 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 August 2024.

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

About 17,500 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is HWY S Union ST over RR Mbta/Bmrr?

The structure is 118 ft (36 m) long with a longest span of 114 ft (34.7 m) and a deck 59 ft wide.

Who owns HWY S Union ST over RR Mbta/Bmrr?

It is owned by the State Highway Agency.