US Bridges

HWY Dedham ST over RR Amtrak/Mbta

Good

Norfolk County, Massachusetts · .16 Km. Se. Neponset R. · Structure no. C02024371DOT634

Built
1937
88 years old, rebuilt 1995
Condition
Good
inspected November 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
166 ft
3 main spans
Daily traffic
17,650
2018 count
Owner
State
State Highway Agency

About this bridge

HWY Dedham ST over RR Amtrak/Mbta is a steel continuous stringer/multi-beam or girder carrying HWY Dedham ST over RR Amtrak/Mbta in Norfolk County, Massachusetts. It was built in 1937 and reconstructed in 1995, so it is 88 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 17,650 vehicles a day, roughly 6% of them trucks, projected to reach 24,953 by 2032. The structure is 166 ft (50.7 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesHWY Dedham ST
CrossesRR Amtrak/Mbta
Location.16 Km. Se. Neponset R.
RouteCity Street 0
CountyNorfolk County
StateMassachusetts
Coordinates42.19617, -71.15393
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2021
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating90.9 US tons
Inventory rating54.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length166 ft (50.7 m)
Longest span71 ft (21.7 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,650 (2018)
Projected traffic24,953 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1995.

What condition is HWY Dedham ST over RR Amtrak/Mbta in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2021.

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

About 17,650 vehicles per day (2018 count), of which roughly 6% are trucks.

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

The structure is 166 ft (50.7 m) long with a longest span of 71 ft (21.7 m) and a deck 36 ft wide.

Who owns HWY Dedham ST over RR Amtrak/Mbta?

It is owned by the State Highway Agency.