Structure 630336 · Durham County, NC

Nc147 over Sr1320

Carries Nc147 over Sr1320, 0.3 Mi. S. Jct. Sr1322.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT129 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

129 ft end to end. 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.

Built199135 years old
Length128.9 ft39.3 m
Daily traffic24,750counted 2020
Last inspectedAugust 2023every 24 months

Location

StateNorth Carolina
CountyDurham
Location0.3 Mi. S. Jct. Sr1322
CarriesNc147
CrossesSr1320
Coordinates36.00532, -78.92372

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length128.9 ft (39.3 m)
Max Span126.0 ft (38.4 m)
Deck Width50.9 ft (15.5 m)
Deck Area609.1 sq m
Main Spans1
Year Built1991

Traffic

Avg Daily Traffic24,750 (2020)
Truck Traffic12%
Lanes On Bridge3
Lanes Under Bridge3

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000630336

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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