US Bridges

HWY Nepnst V Pky over Water Neponset River

FairPosted for load

Suffolk County, Massachusetts · .16 KM E of Truman HWY · Structure no. B160274F9DOTNBI

Built
1849
176 years old, rebuilt 1932
Condition
Fair
inspected February 2023
Type
Arch - Deck
Masonry
Length
69 ft
3 main spans
Daily traffic
23,300
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Nepnst V Pky over Water Neponset River is a masonry arch - deck carrying HWY Nepnst V Pky over Water Neponset River in Suffolk County, Massachusetts. It was built in 1849 and reconstructed in 1932, so it is 176 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. Its operating status is: posted for load restriction.

It carries about 23,300 vehicles a day, roughly 13% of them trucks, projected to reach 35,534 by 2032. The structure is 69 ft (21 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHWY Nepnst V Pky
CrossesWater Neponset River
Location.16 KM E of Truman HWY
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.23454, -71.12275
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating32 US tons
Inventory rating31.9 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans3
Design loadUnknown
Structure length69 ft (21 m)
Longest span20 ft (6.1 m)
Deck width53 ft (16.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,300 (2023)
Projected traffic35,534 by 2032
Trucks13%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Nepnst V Pky over Water Neponset River built?

It was built in 1849, making it 176 years old in 2025. It was reconstructed in 1932.

What condition is HWY Nepnst V Pky 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 February 2023.

How much traffic does HWY Nepnst V Pky over Water Neponset River carry?

About 23,300 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is HWY Nepnst V Pky over Water Neponset River?

The structure is 69 ft (21 m) long with a longest span of 20 ft (6.1 m) and a deck 53 ft wide.

Who owns HWY Nepnst V Pky over Water Neponset River?

It is owned by the State Highway Agency.