US Bridges

ST116 Amherst RD over Water Bachelor Brook

Fair

Hampshire County, Massachusetts · .3 M S Granby-Hadley T.L. · Structure no. S180050VJDOTNBI

Built
1956
69 years old
Condition
Fair
inspected December 2024
Type
Slab
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
8,534
2018 count
Owner
State
State Highway Agency

About this bridge

ST116 Amherst RD over Water Bachelor Brook is a prestressed concrete slab carrying ST116 Amherst RD over Water Bachelor Brook in Hampshire County, Massachusetts. It was built in 1956, so it is 69 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 8,534 vehicles a day, roughly 7% of them trucks, projected to reach 12,161 by 2031. The structure is 39 ft (12 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesST116 Amherst RD
CrossesWater Bachelor Brook
Location.3 M S Granby-Hadley T.L.
RouteState Highway 116
CountyHampshire County
StateMassachusetts
Coordinates42.27774, -72.56211
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionDecember 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating62.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length39 ft (12 m)
Longest span38 ft (11.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,534 (2018)
Projected traffic12,161 by 2031
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST116 Amherst RD over Water Bachelor Brook built?

It was built in 1956, making it 69 years old in 2025.

What condition is ST116 Amherst RD over Water Bachelor 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 ST116 Amherst RD over Water Bachelor Brook carry?

About 8,534 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is ST116 Amherst RD over Water Bachelor Brook?

The structure is 39 ft (12 m) long with a longest span of 38 ft (11.5 m) and a deck 32 ft wide.

Who owns ST116 Amherst RD over Water Bachelor Brook?

It is owned by the State Highway Agency.