US Bridges

HWY Agassiz RD over Water Muddy River

FairPosted for load

Suffolk County, Massachusetts · 2.1 KM S of Rt 9 · Structure no. B16189391MUNNBI

Built
1889
136 years old
Condition
Fair
inspected February 2023
Type
Arch - Deck
Masonry
Length
67 ft
5 main spans
Daily traffic
1,000
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Agassiz RD over Water Muddy River is a masonry arch - deck carrying HWY Agassiz RD over Water Muddy River in Suffolk County, Massachusetts. It was built in 1889, so it is 136 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 1,000 vehicles a day, projected to reach 3,317 by 2032. The structure is 67 ft (20.4 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Agassiz RD
CrossesWater Muddy River
Location2.1 KM S of Rt 9
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.34313, -71.0942
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19.2 US tons
Inventory rating19.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans5
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span12 ft (3.7 m)
Deck width73 ft (22.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2017)
Projected traffic3,317 by 2032
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Agassiz RD over Water Muddy River built?

It was built in 1889, making it 136 years old in 2025.

What condition is HWY Agassiz RD 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 2023.

How much traffic does HWY Agassiz RD over Water Muddy River carry?

About 1,000 vehicles per day (2017 count).

How long is HWY Agassiz RD over Water Muddy River?

The structure is 67 ft (20.4 m) long with a longest span of 12 ft (3.7 m) and a deck 73 ft wide.

Who owns HWY Agassiz RD over Water Muddy River?

It is owned by the City or Municipal Highway Agency.