US Bridges

HWY Neponset ST over Water E Br Neponset Riv

Fair

Norfolk County, Massachusetts · W. of R.R. Viaduct · Structure no. C0201433FMUNNBI

Built
1850
175 years old, rebuilt 1929
Condition
Fair
inspected July 2024
Type
Arch - Deck
Masonry
Length
20 ft
1 main span
Daily traffic
28,200
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Neponset ST over Water E Br Neponset Riv is a masonry arch - deck carrying HWY Neponset ST over Water E Br Neponset Riv in Norfolk County, Massachusetts. It was built in 1850 and reconstructed in 1929, so it is 175 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 28,200 vehicles a day, roughly 4% of them trucks, projected to reach 32,534 by 2031. The structure is 20 ft (6.1 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHWY Neponset ST
CrossesWater E Br Neponset Riv
LocationW. of R.R. Viaduct
RouteCity Street 0
Coordinates42.1587, -71.15464
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width60 ft (18.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,200 (2024)
Projected traffic32,534 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Neponset ST over Water E Br Neponset Riv built?

It was built in 1850, making it 175 years old in 2025. It was reconstructed in 1929.

What condition is HWY Neponset ST over Water E Br Neponset Riv 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 July 2024.

How much traffic does HWY Neponset ST over Water E Br Neponset Riv carry?

About 28,200 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Neponset ST over Water E Br Neponset Riv?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 60 ft wide.

Who owns HWY Neponset ST over Water E Br Neponset Riv?

It is owned by the Town or Township Highway Agency.