US Bridges

SR1670 over US64

Fair

Nash County, North Carolina · 0.4MI N. of Nc 58 · Structure no. 000000001270123

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
280 ft
4 main spans
Daily traffic
2,700
2022 count
Owner
State
State Highway Agency

About this bridge

SR1670 over US64 is a steel stringer/multi-beam or girder carrying SR1670 over US64 in Nash County, North Carolina. It was built in 1960, so it is 65 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 2,700 vehicles a day, roughly 6% of them trucks, projected to reach 5,400 by 2040. The structure is 280 ft (85.3 m) long and 33 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSR1670
CrossesUS64
Location0.4MI N. of Nc 58
RouteState Highway 1670
CountyNash County
StateNorth Carolina
Coordinates35.97889, -77.95602
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length280 ft (85.3 m)
Longest span79 ft (24 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2022)
Projected traffic5,400 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 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 SR1670 over US64 built?

It was built in 1960, making it 65 years old in 2025.

What condition is SR1670 over US64 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 September 2024.

How much traffic does SR1670 over US64 carry?

About 2,700 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR1670 over US64?

The structure is 280 ft (85.3 m) long with a longest span of 79 ft (24 m) and a deck 33 ft wide.

Who owns SR1670 over US64?

It is owned by the State Highway Agency.