US Bridges

SR1108 over Bonarva Canal

FairPosted for load

Tyrrell County, North Carolina · 2.7 Mi. W. Jct. SR1105 · Structure no. 000000001770085

Built
1972
53 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
170
2015 count
Owner
State
State Highway Agency

About this bridge

SR1108 over Bonarva Canal is a prestressed concrete channel beam carrying SR1108 over Bonarva Canal in Tyrrell County, North Carolina. It was built in 1972, so it is 53 years old, older than the North Carolina average of 38.7 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. Its operating status is: posted for load restriction.

It carries about 170 vehicles a day, roughly 6% of them trucks, projected to reach 340 by 2040. The structure is 30 ft (9.1 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSR1108
CrossesBonarva Canal
Location2.7 Mi. W. Jct. SR1105
RouteState Highway 1108
CountyTyrrell County
StateNorth Carolina
Coordinates35.86901, -76.30526
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating24.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2015)
Projected traffic340 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1108 over Bonarva Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR1108 over Bonarva 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 February 2024.

How much traffic does SR1108 over Bonarva Canal carry?

About 170 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR1108 over Bonarva Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns SR1108 over Bonarva Canal?

It is owned by the State Highway Agency.