US Bridges

ST143 Main RD over Water Bronson Brk West B

Fair

Hampshire County, Massachusetts · .7 M W JCT Ireland St. · Structure no. C120120K0DOTNBI

Built
1928
97 years old, rebuilt 1993
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
2,069
2018 count
Owner
State
State Highway Agency

About this bridge

ST143 Main RD over Water Bronson Brk West B is a concrete continuous tee beam carrying ST143 Main RD over Water Bronson Brk West B in Hampshire County, Massachusetts. It was built in 1928 and reconstructed in 1993, so it is 97 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 2,069 vehicles a day, roughly 7% of them trucks, projected to reach 474 by 2031. The structure is 101 ft (30.8 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesST143 Main RD
CrossesWater Bronson Brk West B
Location.7 M W JCT Ireland St.
RouteState Highway 143
CountyHampshire County
StateMassachusetts
Coordinates42.40565, -72.88737
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span52 ft (15.8 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,069 (2018)
Projected traffic474 by 2031
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST143 Main RD over Water Bronson Brk West B built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1993.

What condition is ST143 Main RD over Water Bronson Brk West B 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 October 2024.

How much traffic does ST143 Main RD over Water Bronson Brk West B carry?

About 2,069 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is ST143 Main RD over Water Bronson Brk West B?

The structure is 101 ft (30.8 m) long with a longest span of 52 ft (15.8 m) and a deck 34 ft wide.

Who owns ST143 Main RD over Water Bronson Brk West B?

It is owned by the State Highway Agency.