Structure 970204 · Iredell County, NC

I77 over Olin Creek

Carries I77 over Olin Creek, 1.9 Mi. N. Jct. Sr1890.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 53 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built197353 years old
Length52.8 ft16.1 m
Daily traffic29,500counted 2020
Last inspectedMay 2024every 24 months

Location

StateNorth Carolina
CountyIredell
Location1.9 Mi. N. Jct. Sr1890
CarriesI77
CrossesOlin Creek
Coordinates35.94382, -80.85208

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length52.8 ft (16.1 m)
Max Span11.8 ft (3.6 m)
Deck Area386.4 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic29,500 (2020)
Truck Traffic23%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000970204

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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