US Bridges

SR1670 over Crabtree Creek

FairPosted for load

Wake County, North Carolina · 0.1 Mi.N. of JCT.SR1760 · Structure no. 000000001830494

Built
1967
58 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
250 ft
4 main spans
Daily traffic
13,500
2021 count
Owner
State
State Highway Agency

About this bridge

SR1670 over Crabtree Creek is a steel stringer/multi-beam or girder carrying SR1670 over Crabtree Creek in Wake County, North Carolina. It was built in 1967, so it is 58 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. Its operating status is: posted for load restriction.

It carries about 13,500 vehicles a day, roughly 7% of them trucks, projected to reach 27,000 by 2040. The structure is 250 ft (76.2 m) long and 57 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR1670
CrossesCrabtree Creek
Location0.1 Mi.N. of JCT.SR1760
RouteState Highway 1670
CountyWake County
StateNorth Carolina
Coordinates35.83683, -78.67486
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.
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
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 spans4
Design loadHS 15
Structure length250 ft (76.2 m)
Longest span61 ft (18.5 m)
Deck width57 ft (17.5 m)
Roadway width48 ft (14.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2021)
Projected traffic27,000 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1670 over Crabtree Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR1670 over Crabtree Creek 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 2024.

How much traffic does SR1670 over Crabtree Creek carry?

About 13,500 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is SR1670 over Crabtree Creek?

The structure is 250 ft (76.2 m) long with a longest span of 61 ft (18.5 m) and a deck 57 ft wide.

Who owns SR1670 over Crabtree Creek?

It is owned by the State Highway Agency.