Structure 810080 · Guilford County, NC

Sr1820 over I74 Us311

Carries Sr1820 over I74 Us311, 1.26 Mi. E. Jct. Sr1003.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT257 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

257 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.

Built197947 years old
Length256.9 ft78.3 m
Daily traffic6,800counted 2021
Last inspectedJune 2023every 24 months

Location

StateNorth Carolina
CountyGuilford
Location1.26 Mi. E. Jct. Sr1003
CarriesSr1820
CrossesI74 Us311
Coordinates36.01685, -80.04294

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length256.9 ft (78.3 m)
Max Span135.8 ft (41.4 m)
Deck Width46.9 ft (14.3 m)
Deck Area1119.7 sq m
Main Spans2
Year Built1979

Traffic

Avg Daily Traffic6,800 (2021)
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000810080

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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