US Bridges

ST116 Amherst RD over Water Long Plain Brook

Fair

Franklin County, Massachusetts · 3.2 M E Conn River · Structure no. S320050VKDOTNBI

Built
1956
69 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
13,876
2017 count
Owner
State
State Highway Agency

About this bridge

ST116 Amherst RD over Water Long Plain Brook is a concrete slab carrying ST116 Amherst RD over Water Long Plain Brook in Franklin 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 13,876 vehicles a day, roughly 9% of them trucks, projected to reach 22,742 by 2031. The structure is 25 ft (7.6 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesST116 Amherst RD
CrossesWater Long Plain Brook
Location3.2 M E Conn River
RouteState Highway 116
CountyFranklin County
StateMassachusetts
Coordinates42.43418, -72.54566
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
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span21 ft (6.4 m)
Deck width46 ft (14.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,876 (2017)
Projected traffic22,742 by 2031
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST116 Amherst RD over Water Long Plain Brook built?

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

What condition is ST116 Amherst RD over Water Long Plain 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 September 2024.

How much traffic does ST116 Amherst RD over Water Long Plain Brook carry?

About 13,876 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is ST116 Amherst RD over Water Long Plain Brook?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.4 m) and a deck 46 ft wide.

Who owns ST116 Amherst RD over Water Long Plain Brook?

It is owned by the State Highway Agency.