US Bridges

Ri 138 over West Passage Narra Bay

Fair

Newport County, Rhode Island · 2.0 MI E of JCT US 1 · Structure no. 000000000008000

Built
1992
33 years old, rebuilt 2009
Condition
Fair
inspected May 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
7,353 ft
23 main spans
Daily traffic
33,100
2021 count
Owner
Toll Authority
State Toll Authority

About this bridge

Ri 138 over West Passage Narra Bay is a prestressed concrete continuous segmental box girder carrying Ri 138 over West Passage Narra Bay in Newport County, Rhode Island. It was built in 1992 and reconstructed in 2009, so it is 33 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 33,100 vehicles a day, roughly 4% of them trucks, projected to reach 36,410 by 2041. The structure is 7,353 ft (2,241.2 m) long and 74 ft wide. If it were closed, the detour would be 57.2 mi (92 km).

CarriesRi 138
CrossesWest Passage Narra Bay
Location2.0 MI E of JCT US 1
RouteState Highway 138
Coordinates41.52833, -71.40276
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans23 (+29 approach)
Design loadHS 20
Structure length7,353 ft (2,241.2 m)
Longest span636 ft (193.9 m)
Deck width74 ft (22.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,100 (2021)
Projected traffic36,410 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed57.2 mi (92 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.3 million (2020 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Ri 138 over West Passage Narra Bay built?

It was built in 1992, making it 33 years old in 2025. It was reconstructed in 2009.

What condition is Ri 138 over West Passage Narra Bay 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 May 2023.

How much traffic does Ri 138 over West Passage Narra Bay carry?

About 33,100 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Ri 138 over West Passage Narra Bay?

The structure is 7,353 ft (2,241.2 m) long with a longest span of 636 ft (193.9 m) and a deck 74 ft wide.

Who owns Ri 138 over West Passage Narra Bay?

It is owned by the State Toll Authority.