US Bridges

ST105 E Main ST over Water Nemasket River

Fair

Plymouth County, Massachusetts · 1.3 M S of RTE 44 · Structure no. M1802249YDOTNBI

Built
1926
99 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
38 ft
1 main span
Daily traffic
8,857
2024 count
Owner
State
State Highway Agency

About this bridge

ST105 E Main ST over Water Nemasket River is a concrete tee beam carrying ST105 E Main ST over Water Nemasket River in Plymouth County, Massachusetts. It was built in 1926, so it is 99 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 8,857 vehicles a day, roughly 10% of them trucks, projected to reach 15,635 by 2031. The structure is 38 ft (11.6 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST105 E Main ST
CrossesWater Nemasket River
Location1.3 M S of RTE 44
RouteState Highway 105
CountyPlymouth County
StateMassachusetts
Coordinates41.89623, -70.89759
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.4 US tons
Inventory rating35.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width50 ft (15.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,857 (2024)
Projected traffic15,635 by 2031
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.8 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST105 E Main ST over Water Nemasket River built?

It was built in 1926, making it 99 years old in 2025.

What condition is ST105 E Main ST over Water Nemasket 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 August 2024.

How much traffic does ST105 E Main ST over Water Nemasket River carry?

About 8,857 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is ST105 E Main ST over Water Nemasket River?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 50 ft wide.

Who owns ST105 E Main ST over Water Nemasket River?

It is owned by the State Highway Agency.