US Bridges

Lasalle St. over NC147

Fair

Durham County, North Carolina · 0.2 MI.S.JCT.US70 Bus. · Structure no. 000000000630311

Built
1985
40 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
273 ft
4 main spans
Daily traffic
6,700
1991 count
Owner
State
State Highway Agency

About this bridge

Lasalle St. over NC147 is a steel stringer/multi-beam or girder carrying Lasalle St. over NC147 in Durham County, North Carolina. It was built in 1985, so it is 40 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 6,700 vehicles a day, roughly 7% of them trucks, projected to reach 13,400 by 2040. The structure is 273 ft (83.2 m) long and 48 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLasalle St.
CrossesNC147
Location0.2 MI.S.JCT.US70 Bus.
RouteCity Street 0
CountyDurham County
StateNorth Carolina
Coordinates36.01607, -78.94598
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating40.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length273 ft (83.2 m)
Longest span97 ft (29.5 m)
Deck width48 ft (14.7 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (1991)
Projected traffic13,400 by 2040
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 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 Lasalle St. over NC147 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Lasalle St. over NC147 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 Lasalle St. over NC147 carry?

About 6,700 vehicles per day (1991 count), of which roughly 7% are trucks.

How long is Lasalle St. over NC147?

The structure is 273 ft (83.2 m) long with a longest span of 97 ft (29.5 m) and a deck 48 ft wide.

Who owns Lasalle St. over NC147?

It is owned by the State Highway Agency.