Structure 630135 · Durham County, NC

Us15/501 Sbl over I85 Us70 Creek

Carries Us15/501 Sbl over I85 Us70 Creek, 0.2 Mi. N. Jct. Sr1401.

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 FT744 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

744 ft end to end, longest span 196 ft: about 2.1 football fields. 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
Length743.8 ft226.7 m
Daily traffic25,000counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateNorth Carolina
CountyDurham
Location0.2 Mi. N. Jct. Sr1401
CarriesUs15/501 Sbl
CrossesI85 Us70 Creek
Coordinates36.02443, -78.94765

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length743.8 ft (226.7 m)
Max Span195.9 ft (59.7 m)
Deck Width59.1 ft (18 m)
Deck Area4080.6 sq m
Main Spans4
Year Built2006

Traffic

Avg Daily Traffic25,000 (2022)
Truck Traffic12%
Lanes On Bridge3
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 Critical8 — Stable, low risk
Structure Number000000000630135

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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