Structure 630588 · Durham County, NC

Nc885n over Sr1999

Carries Nc885n over Sr1999, 0.39 Mi S Jct Sr1978.

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 FT146 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

146 ft end to end: about 2 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.

Built201115 years old
Length146.0 ft44.5 m
Daily traffic8,250counted 2022
Last inspectedJuly 2024every 24 months

Location

StateNorth Carolina
CountyDurham
Location0.39 Mi S Jct Sr1978
CarriesNc885n
CrossesSr1999
Coordinates35.87070, -78.86547

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length146.0 ft (44.5 m)
Max Span139.8 ft (42.6 m)
Deck Width63.6 ft (19.4 m)
Deck Area863.3 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic8,250 (2022)
Truck Traffic12%
Lanes On Bridge3
Lanes Under Bridge7

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000630588

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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