US Bridges

SR1311 over North Prong Lewis Fork C

Fair

Wilkes County, North Carolina · .1 MI.E.JCT.SR1307 · Structure no. 000000001930076

Built
1957
68 years old, rebuilt 1988
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
110 ft
4 main spans
Daily traffic
460
2014 count
Owner
State
State Highway Agency

About this bridge

SR1311 over North Prong Lewis Fork C is a steel stringer/multi-beam or girder carrying SR1311 over North Prong Lewis Fork C in Wilkes County, North Carolina. It was built in 1957 and reconstructed in 1988, so it is 68 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 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 460 vehicles a day, roughly 6% of them trucks, projected to reach 920 by 2040. The structure is 110 ft (33.5 m) long and 12 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR1311
CrossesNorth Prong Lewis Fork C
Location.1 MI.E.JCT.SR1307
RouteState Highway 1311
CountyWilkes County
StateNorth Carolina
Coordinates36.1486, -81.29982
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.9 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans4
Design loadUnknown
Structure length110 ft (33.5 m)
Longest span59 ft (17.9 m)
Deck width12 ft (3.6 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2014)
Projected traffic920 by 2040
Trucks6%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1311 over North Prong Lewis Fork C built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1988.

What condition is SR1311 over North Prong Lewis Fork C 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 November 2024.

How much traffic does SR1311 over North Prong Lewis Fork C carry?

About 460 vehicles per day (2014 count), of which roughly 6% are trucks.

How long is SR1311 over North Prong Lewis Fork C?

The structure is 110 ft (33.5 m) long with a longest span of 59 ft (17.9 m) and a deck 12 ft wide.

Who owns SR1311 over North Prong Lewis Fork C?

It is owned by the State Highway Agency.