US Bridges

HWY Milton ST over RR Amtrak/Mbta

Fair

Suffolk County, Massachusetts · 182 M NW of Wolcott Sq. · Structure no. B161113H0DOT634

Built
1919
106 years old, rebuilt 1977
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
210 ft
2 main spans
Daily traffic
42,700
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Milton ST over RR Amtrak/Mbta is a steel continuous stringer/multi-beam or girder carrying HWY Milton ST over RR Amtrak/Mbta in Suffolk County, Massachusetts. It was built in 1919 and reconstructed in 1977, so it is 106 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 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 42,700 vehicles a day, roughly 12% of them trucks, projected to reach 50,380 by 2032. The structure is 210 ft (64.1 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHWY Milton ST
CrossesRR Amtrak/Mbta
Location182 M NW of Wolcott Sq.
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.23951, -71.13319
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating70.2 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length210 ft (64.1 m)
Longest span106 ft (32.3 m)
Deck width55 ft (16.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,700 (2023)
Projected traffic50,380 by 2032
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of relocation of road
Estimated improvement cost$25.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Milton ST over RR Amtrak/Mbta built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1977.

What condition is HWY Milton ST over RR Amtrak/Mbta 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 May 2023.

How much traffic does HWY Milton ST over RR Amtrak/Mbta carry?

About 42,700 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is HWY Milton ST over RR Amtrak/Mbta?

The structure is 210 ft (64.1 m) long with a longest span of 106 ft (32.3 m) and a deck 55 ft wide.

Who owns HWY Milton ST over RR Amtrak/Mbta?

It is owned by the State Highway Agency.