US Bridges

I-77 Nbl over Fisher River SR1479

Fair

Surry County, North Carolina · 1.6 MI.N.JCT.SR1341 · Structure no. 000000001710178

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
301 ft
5 main spans
Daily traffic
12,000
2020 count
Owner
State
State Highway Agency

About this bridge

I-77 Nbl over Fisher River SR1479 is a prestressed concrete stringer/multi-beam or girder carrying I-77 Nbl over Fisher River SR1479 in Surry County, North Carolina. It was built in 1975, so it is 50 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 12,000 vehicles a day, roughly 23% of them trucks, projected to reach 24,000 by 2040. The structure is 301 ft (91.7 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-77 Nbl
CrossesFisher River SR1479
Location1.6 MI.N.JCT.SR1341
RouteInterstate 77
Coordinates36.44593, -80.77539
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating81.9 US tons
Inventory rating40.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length301 ft (91.7 m)
Longest span58 ft (17.6 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2020)
Projected traffic24,000 by 2040
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-77 Nbl over Fisher River SR1479 built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-77 Nbl over Fisher River SR1479 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 July 2023.

How much traffic does I-77 Nbl over Fisher River SR1479 carry?

About 12,000 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is I-77 Nbl over Fisher River SR1479?

The structure is 301 ft (91.7 m) long with a longest span of 58 ft (17.6 m) and a deck 42 ft wide.

Who owns I-77 Nbl over Fisher River SR1479?

It is owned by the State Highway Agency.