US Bridges

SR3345 over Southern Railway

Fair

Davidson County, North Carolina · 0.2 MI.S.JCT.US29B & US70 · Structure no. 000000000570106

Built
1953
72 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
158 ft
3 main spans
Daily traffic
14,000
2016 count
Owner
State
State Highway Agency

About this bridge

SR3345 over Southern Railway is a steel stringer/multi-beam or girder carrying SR3345 over Southern Railway in Davidson County, North Carolina. It was built in 1953, so it is 72 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 14,000 vehicles a day, roughly 6% of them trucks, projected to reach 28,000 by 2040. The structure is 158 ft (48.1 m) long and 48 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR3345
CrossesSouthern Railway
Location0.2 MI.S.JCT.US29B & US70
RouteState Highway 3345
CountyDavidson County
StateNorth Carolina
Coordinates35.81296, -80.26249
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length158 ft (48.1 m)
Longest span61 ft (18.5 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2016)
Projected traffic28,000 by 2040
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR3345 over Southern Railway built?

It was built in 1953, making it 72 years old in 2025.

What condition is SR3345 over Southern Railway 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 SR3345 over Southern Railway carry?

About 14,000 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is SR3345 over Southern Railway?

The structure is 158 ft (48.1 m) long with a longest span of 61 ft (18.5 m) and a deck 48 ft wide.

Who owns SR3345 over Southern Railway?

It is owned by the State Highway Agency.