Structure 630338 · Durham County, NC

Nc147n over Us15/501 Byp.

Carries Nc147n over Us15/501 Byp., Jct.nc147&us15/501 Bypass.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT302 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

302 ft end to end, longest span 81 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built199432 years old
Length301.8 ft92 m
Daily traffic22,000counted 2022
Last inspectedAugust 2024every 24 months

Location

StateNorth Carolina
CountyDurham
LocationJct.nc147&us15/501 Bypass
CarriesNc147n
CrossesUs15/501 Byp.
Coordinates36.01677, -78.95083

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length301.8 ft (92 m)
Max Span80.7 ft (24.6 m)
Deck Width60.7 ft (18.5 m)
Deck Area1,702 sq m
Main Spans5
Year Built1994

Traffic

Avg Daily Traffic22,000 (2022)
Truck Traffic12%
Lanes On Bridge4
Lanes Under Bridge9

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000630338

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges