Structure 570207 · Davidson County, NC

Sr2315 over Four Mile Branch

Carries Sr2315 over Four Mile Branch, 0.2 Mi. W. Jct. Sr2310.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT97 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

97 ft end to end, longest span 44 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built199828 years old
Length96.8 ft29.5 m
Daily traffic100counted 2000
Last inspectedApril 2024every 24 months

Location

StateNorth Carolina
CountyDavidson
Location0.2 Mi. W. Jct. Sr2310
CarriesSr2315
CrossesFour Mile Branch
Coordinates35.70243, -80.17797

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length96.8 ft (29.5 m)
Max Span44.0 ft (13.4 m)
Deck Width26.9 ft (8.2 m)
Deck Area241.9 sq m
Main Spans3
Year Built1998

Traffic

Avg Daily Traffic100 (2000)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000570207

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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