Structure 970207 · Iredell County, NC

I77 Sbl over Rocky Creek

Carries I77 Sbl over Rocky Creek, 3.1 Mi. S. Jct. Nc901.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT240 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

240 ft end to end, longest span 59 ft: about 3 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.

Built197254 years old
Length239.8 ft73.1 m
Daily traffic14,750counted 2020
Last inspectedJune 2024every 24 months

Location

StateNorth Carolina
CountyIredell
Location3.1 Mi. S. Jct. Nc901
CarriesI77 Sbl
CrossesRocky Creek
Coordinates35.96559, -80.84448

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length239.8 ft (73.1 m)
Max Span58.7 ft (17.9 m)
Deck Width42.3 ft (12.9 m)
Deck Area943.0 sq m
Main Spans4
Year Built1972

Traffic

Avg Daily Traffic14,750 (2020)
Truck Traffic23%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000970207

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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