US Bridges

HWY Longwood Ave over Water Muddy River

Fair

Suffolk County, Massachusetts · .8 KM N of JCT SR9&JWAY · Structure no. B161923F2DOTNBI

Built
1897
128 years old
Condition
Fair
inspected February 2024
Type
Arch - Deck
Masonry
Length
100 ft
1 main span
Daily traffic
14,700
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Longwood Ave over Water Muddy River is a masonry arch - deck carrying HWY Longwood Ave over Water Muddy River in Suffolk County, Massachusetts. It was built in 1897, so it is 128 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 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 14,700 vehicles a day, roughly 4% of them trucks, projected to reach 35,534 by 2033. The structure is 100 ft (30.5 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 Longwood Ave
CrossesWater Muddy River
Location.8 KM N of JCT SR9&JWAY
CountySuffolk County
StateMassachusetts
Coordinates42.34042, -71.11066
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadH 20
Structure length100 ft (30.5 m)
Longest span100 ft (30.5 m)
Deck width60 ft (18.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2024)
Projected traffic35,534 by 2033
Trucks4%
Lanes on structure3
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$5.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Longwood Ave over Water Muddy River built?

It was built in 1897, making it 128 years old in 2025.

What condition is HWY Longwood Ave over Water Muddy 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 2024.

How much traffic does HWY Longwood Ave over Water Muddy River carry?

About 14,700 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Longwood Ave over Water Muddy River?

The structure is 100 ft (30.5 m) long with a longest span of 100 ft (30.5 m) and a deck 60 ft wide.

Who owns HWY Longwood Ave over Water Muddy River?

It is owned by the State Highway Agency.