US Bridges

ST116 Conway RD over Water Mill River

Fair

Franklin County, Massachusetts · 0.05 M S of Conway Tl · Structure no. D06028129DOTNBI

Built
1917
108 years old, rebuilt 1933
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
4,914
2016 count
Owner
State
State Highway Agency

About this bridge

ST116 Conway RD over Water Mill River is a concrete slab carrying ST116 Conway RD over Water Mill River in Franklin County, Massachusetts. It was built in 1917 and reconstructed in 1933, so it is 108 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 4,914 vehicles a day, projected to reach 1,226 by 2031. The structure is 24 ft (7.3 m) long and 69 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST116 Conway RD
CrossesWater Mill River
Location0.05 M S of Conway Tl
RouteState Highway 116
CountyFranklin County
StateMassachusetts
Coordinates42.50703, -72.6535
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating37.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span20 ft (6.1 m)
Deck width69 ft (20.9 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,914 (2016)
Projected traffic1,226 by 2031
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$842,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST116 Conway RD over Water Mill River built?

It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1933.

What condition is ST116 Conway RD over Water Mill 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 October 2024.

How much traffic does ST116 Conway RD over Water Mill River carry?

About 4,914 vehicles per day (2016 count).

How long is ST116 Conway RD over Water Mill River?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 69 ft wide.

Who owns ST116 Conway RD over Water Mill River?

It is owned by the State Highway Agency.