US Bridges

SR1471 over Flat River

Fair

Durham County, North Carolina · 0.1 Mi. E. Jct. SR1771 · Structure no. 000000000630009

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
240 ft
4 main spans
Daily traffic
2,000
2015 count
Owner
State
State Highway Agency

About this bridge

SR1471 over Flat River is a steel stringer/multi-beam or girder carrying SR1471 over Flat River in Durham County, North Carolina. It was built in 1980, so it is 45 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 2,000 vehicles a day, roughly 6% of them trucks, projected to reach 4,000 by 2040. The structure is 240 ft (73.1 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR1471
CrossesFlat River
Location0.1 Mi. E. Jct. SR1771
RouteState Highway 1471
CountyDurham County
StateNorth Carolina
Coordinates36.22761, -78.88888
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85 US tons
Inventory rating50.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 15
Structure length240 ft (73.1 m)
Longest span59 ft (17.9 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2015)
Projected traffic4,000 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1471 over Flat River built?

It was built in 1980, making it 45 years old in 2025.

What condition is SR1471 over Flat River 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 June 2023.

How much traffic does SR1471 over Flat River carry?

About 2,000 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR1471 over Flat River?

The structure is 240 ft (73.1 m) long with a longest span of 59 ft (17.9 m) and a deck 31 ft wide.

Who owns SR1471 over Flat River?

It is owned by the State Highway Agency.