Structure 810805 · Guilford County, NC

Sr3300 over I85 Us421

Carries Sr3300 over I85 Us421, 0.6 Mi.s.jct.sr3505.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT263 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

263 ft end to end, longest span 131 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.

Built200323 years old
Length262.8 ft80.1 m
Daily traffic16,000counted 2021
Last inspectedOctober 2023every 24 months

Location

StateNorth Carolina
CountyGuilford
Location0.6 Mi.s.jct.sr3505
CarriesSr3300
CrossesI85 Us421
Coordinates36.00075, -79.79219

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length262.8 ft (80.1 m)
Max Span130.9 ft (39.9 m)
Deck Width81.4 ft (24.8 m)
Deck Area1986.5 sq m
Main Spans2
Year Built2003

Traffic

Avg Daily Traffic16,000 (2021)
Truck Traffic6%
Lanes On Bridge4
Lanes Under Bridge8

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000810805

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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