US Bridges

SR3549 over I85

Good

Guilford County, North Carolina · 0.4 Mi. E. Jct. US421 · Structure no. 000000000810813

Built
2001
24 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
330 ft
2 main spans
Daily traffic
2,200
2022 count
Owner
State
State Highway Agency

About this bridge

SR3549 over I85 is a steel continuous stringer/multi-beam or girder carrying SR3549 over I85 in Guilford County, North Carolina. It was built in 2001, so it is 24 years old, younger than the North Carolina average of 38.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,200 vehicles a day, roughly 6% of them trucks, projected to reach 4,400 by 2040. The structure is 330 ft (100.5 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR3549
CrossesI85
Location0.4 Mi. E. Jct. US421
RouteState Highway 3549
Coordinates36.00153, -79.74644
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating63.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length330 ft (100.5 m)
Longest span193 ft (58.8 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2022)
Projected traffic4,400 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR3549 over I85 built?

It was built in 2001, making it 24 years old in 2025.

What condition is SR3549 over I85 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does SR3549 over I85 carry?

About 2,200 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR3549 over I85?

The structure is 330 ft (100.5 m) long with a longest span of 193 ft (58.8 m) and a deck 34 ft wide.

Who owns SR3549 over I85?

It is owned by the State Highway Agency.