US Bridges

HWY Central Ave over Water Neponset River

Fair

Suffolk County, Massachusetts · At Riv & Milton Line · Structure no. B16024385MUNNBI

Built
1973
52 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
99 ft
1 main span
Daily traffic
13,488
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Central Ave over Water Neponset River is a steel stringer/multi-beam or girder carrying HWY Central Ave over Water Neponset River in Suffolk County, Massachusetts. It was built in 1973, so it is 52 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 13,488 vehicles a day, roughly 7% of them trucks, projected to reach 25,269 by 2032. The structure is 99 ft (30.2 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Central Ave
CrossesWater Neponset River
LocationAt Riv & Milton Line
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.27029, -71.07326
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length99 ft (30.2 m)
Longest span94 ft (28.7 m)
Deck width60 ft (18.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,488 (2023)
Projected traffic25,269 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Central Ave over Water Neponset River built?

It was built in 1973, making it 52 years old in 2025.

What condition is HWY Central Ave 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 Central Ave over Water Neponset River carry?

About 13,488 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is HWY Central Ave over Water Neponset River?

The structure is 99 ft (30.2 m) long with a longest span of 94 ft (28.7 m) and a deck 60 ft wide.

Who owns HWY Central Ave over Water Neponset River?

It is owned by the City or Municipal Highway Agency.