US Bridges

HWY Dedham ST over Water Neponset River

Fair

Norfolk County, Massachusetts · T/Lwestwood/Norwood · Structure no. C02002ADAMUNNBI

Built
2000
25 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
101 ft
1 main span
Daily traffic
17,845
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Dedham ST over Water Neponset River is a steel stringer/multi-beam or girder carrying HWY Dedham ST over Water Neponset River in Norfolk County, Massachusetts. It was built in 2000, so it is 25 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 17,845 vehicles a day, roughly 7% of them trucks, projected to reach 28,585 by 2032. The structure is 101 ft (30.9 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesHWY Dedham ST
CrossesWater Neponset River
LocationT/Lwestwood/Norwood
RouteCity Street 0
CountyNorfolk County
StateMassachusetts
Coordinates42.19694, -71.15484
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length101 ft (30.9 m)
Longest span96 ft (29.3 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,845 (2023)
Projected traffic28,585 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Dedham ST over Water Neponset River built?

It was built in 2000, making it 25 years old in 2025.

What condition is HWY Dedham ST over Water Neponset River 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 March 2023.

How much traffic does HWY Dedham ST over Water Neponset River carry?

About 17,845 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is HWY Dedham ST over Water Neponset River?

The structure is 101 ft (30.9 m) long with a longest span of 96 ft (29.3 m) and a deck 36 ft wide.

Who owns HWY Dedham ST over Water Neponset River?

It is owned by the Town or Township Highway Agency.