Structure 630132 · Durham County, NC

I85 Us15-501 Us70 over Nc157

Carries I85 Us15-501 Us70 over Nc157, 0.6 Mi.n.jct.i-85 &sr1321.

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 FT270 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

270 ft end to end, longest span 136 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.

Built200620 years old
Length269.7 ft82.2 m
Daily traffic43,750counted 2020
Last inspectedNovember 2023every 24 months

Location

StateNorth Carolina
CountyDurham
Location0.6 Mi.n.jct.i-85 &sr1321
CarriesI85 Us15-501 Us70
CrossesNc157
Coordinates36.02851, -78.92524

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length269.7 ft (82.2 m)
Max Span135.8 ft (41.4 m)
Deck Width170.9 ft (52.1 m)
Deck Area4282.6 sq m
Main Spans3
Year Built2006

Traffic

Avg Daily Traffic43,750 (2020)
Truck Traffic16%
Lanes On Bridge10
Lanes Under Bridge8

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000630132

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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