Structure 630168 · Durham County, NC

I85s Us15s over Nc55

Carries I85s Us15s over Nc55, 2.36 Mi S Jct Sr1671.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT252 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

252 ft end to end, longest span 141 ft: about 3 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.

Built200620 years old
Length252.0 ft76.8 m
Daily traffic40,000counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateNorth Carolina
CountyDurham
Location2.36 Mi S Jct Sr1671
CarriesI85s Us15s
CrossesNc55
Coordinates36.01432, -78.88745

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length252.0 ft (76.8 m)
Max Span140.7 ft (42.9 m)
Deck Width74.1 ft (22.6 m)
Deck Area1735.7 sq m
Main Spans3
Year Built2006

Traffic

Avg Daily Traffic40,000 (2020)
Truck Traffic16%
Lanes On Bridge4
Lanes Under Bridge7

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000630168

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.

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