US Bridges

HWY Boylston ST over Water Muddy River

Fair

Suffolk County, Massachusetts · .2 MI W of Mass Ave · Structure no. B161884FCDOTNBI

Built
1881
144 years old
Condition
Fair
inspected November 2023
Type
Arch - Deck
Masonry
Length
63 ft
1 main span
Daily traffic
51,600
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Boylston ST over Water Muddy River is a masonry arch - deck carrying HWY Boylston ST over Water Muddy River in Suffolk County, Massachusetts. It was built in 1881, so it is 144 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 51,600 vehicles a day, roughly 3% of them trucks, projected to reach 65,225 by 2032. The structure is 63 ft (19.2 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Boylston ST
CrossesWater Muddy River
Location.2 MI W of Mass Ave
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.34671, -71.09213
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48.3 US tons
Inventory rating48.2 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span63 ft (19.2 m)
Deck width100 ft (30.4 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,600 (2023)
Projected traffic65,225 by 2032
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$5.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Boylston ST over Water Muddy River built?

It was built in 1881, making it 144 years old in 2025.

What condition is HWY Boylston ST 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 November 2023.

How much traffic does HWY Boylston ST over Water Muddy River carry?

About 51,600 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is HWY Boylston ST over Water Muddy River?

The structure is 63 ft (19.2 m) long with a longest span of 63 ft (19.2 m) and a deck 100 ft wide.

Who owns HWY Boylston ST over Water Muddy River?

It is owned by the State Highway Agency.