US Bridges

SR1104 over I85

Fair

Davidson County, North Carolina · 0.1 Mi. N. Jct. SR1266 · Structure no. 000000000570163

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
334 ft
4 main spans
Daily traffic
1,600
2020 count
Owner
State
State Highway Agency

About this bridge

SR1104 over I85 is a steel stringer/multi-beam or girder carrying SR1104 over I85 in Davidson County, North Carolina. It was built in 1978, so it is 47 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.

It carries about 1,600 vehicles a day, roughly 7% of them trucks, projected to reach 3,200 by 2040. The structure is 334 ft (101.8 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesSR1104
CrossesI85
Location0.1 Mi. N. Jct. SR1266
RouteState Highway 1104
CountyDavidson County
StateNorth Carolina
Coordinates35.77661, -80.27873
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length334 ft (101.8 m)
Longest span128 ft (39 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2020)
Projected traffic3,200 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1104 over I85 built?

It was built in 1978, making it 47 years old in 2025.

What condition is SR1104 over I85 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 April 2023.

How much traffic does SR1104 over I85 carry?

About 1,600 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SR1104 over I85?

The structure is 334 ft (101.8 m) long with a longest span of 128 ft (39 m) and a deck 42 ft wide.

Who owns SR1104 over I85?

It is owned by the State Highway Agency.