US Bridges

ST112 Main RD over Water Johnson Brook

Fair

Franklin County, Massachusetts · .9 MI N. of Charlemont RD · Structure no. C180110KMDOTNBI

Built
1929
96 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
1,810
2016 count
Owner
State
State Highway Agency

About this bridge

ST112 Main RD over Water Johnson Brook is a concrete tee beam carrying ST112 Main RD over Water Johnson Brook in Franklin County, Massachusetts. It was built in 1929, so it is 96 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 1,810 vehicles a day, roughly 13% of them trucks, projected to reach 2,527 by 2031. The structure is 25 ft (7.6 m) long and 31 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesST112 Main RD
CrossesWater Johnson Brook
Location.9 MI N. of Charlemont RD
RouteState Highway 112
CountyFranklin County
StateMassachusetts
Coordinates42.64412, -72.71949
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.3 US tons
Inventory rating34.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,810 (2016)
Projected traffic2,527 by 2031
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$727,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST112 Main RD over Water Johnson Brook built?

It was built in 1929, making it 96 years old in 2025.

What condition is ST112 Main RD over Water Johnson Brook 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 December 2024.

How much traffic does ST112 Main RD over Water Johnson Brook carry?

About 1,810 vehicles per day (2016 count), of which roughly 13% are trucks.

How long is ST112 Main RD over Water Johnson Brook?

The structure is 25 ft (7.6 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns ST112 Main RD over Water Johnson Brook?

It is owned by the State Highway Agency.