US Bridges

Ri 112 Carolina over Mill Canal

Fair

Washington County, Rhode Island · 0.3 MI S of JCT Shnnck RD · Structure no. 000000000000555

Built
2018
7 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
2 main spans
Daily traffic
3,603
2021 count
Owner
State
State Highway Agency

About this bridge

Ri 112 Carolina over Mill Canal is a prestressed concrete box beam or girders - multiple carrying Ri 112 Carolina over Mill Canal in Washington County, Rhode Island. It was built in 2018, so it is 7 years old, younger than the Rhode Island average of 54.5 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 3,603 vehicles a day, roughly 8% of them trucks, projected to reach 3,963 by 2041. The structure is 59 ft (18.1 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRi 112 Carolina
CrossesMill Canal
Location0.3 MI S of JCT Shnnck RD
RouteState Highway 112
CountyWashington County
StateRhode Island
Coordinates41.45893, -71.6638
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating51.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length59 ft (18.1 m)
Longest span27 ft (8.1 m)
Deck width48 ft (14.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,603 (2021)
Projected traffic3,963 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$4.2 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ri 112 Carolina over Mill Canal built?

It was built in 2018, making it 7 years old in 2025.

What condition is Ri 112 Carolina over Mill Canal 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 June 2023.

How much traffic does Ri 112 Carolina over Mill Canal carry?

About 3,603 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Ri 112 Carolina over Mill Canal?

The structure is 59 ft (18.1 m) long with a longest span of 27 ft (8.1 m) and a deck 48 ft wide.

Who owns Ri 112 Carolina over Mill Canal?

It is owned by the State Highway Agency.