US Bridges

HWY Beacon ST over TR Green Line D

Fair

Middlesex County, Massachusetts · Over Green Line · Structure no. N120414U3MBTNBI

Built
1917
108 years old, rebuilt 1997
Condition
Fair
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
24,000
2022 count
Owner
State
Other State Agency

About this bridge

HWY Beacon ST over TR Green Line D is a prestressed concrete box beam or girders - multiple carrying HWY Beacon ST over TR Green Line D in Middlesex County, Massachusetts. It was built in 1917 and reconstructed in 1997, so it is 108 years old, older 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 24,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,161 by 2031. The structure is 37 ft (11.3 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Beacon ST
CrossesTR Green Line D
LocationOver Green Line
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.32624, -71.23123
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating78.2 US tons
Inventory rating46.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length37 ft (11.3 m)
Longest span36 ft (10.9 m)
Deck width52 ft (15.9 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,000 (2022)
Projected traffic12,161 by 2031
Trucks3%
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

OwnerOther State Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$871,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Beacon ST over TR Green Line D built?

It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1997.

What condition is HWY Beacon ST over TR Green Line D 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 October 2022.

How much traffic does HWY Beacon ST over TR Green Line D carry?

About 24,000 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is HWY Beacon ST over TR Green Line D?

The structure is 37 ft (11.3 m) long with a longest span of 36 ft (10.9 m) and a deck 52 ft wide.

Who owns HWY Beacon ST over TR Green Line D?

It is owned by the Other State Agency and maintained by the State Highway Agency.