Structure 310001202703550 · Humphreys County, MS

SR 12 over Yazoo River

Carries SR 12 over Yazoo River, 0.2 Mi E US 49w.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,272 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

3,272 ft end to end, longest span 300 ft: about 9.1 football fields. 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.

Built198244 years old
Length3272.0 ft997.3 m
Daily traffic1,800counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateMississippi
CountyHumphreys
Location0.2 Mi E US 49w
CarriesSR 12
CrossesYazoo River
Coordinates33.17273, -90.49536

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length3272.0 ft (997.3 m)
Max Span299.9 ft (91.4 m)
Deck Width41.0 ft (12.5 m)
Deck Area12466.2 sq m
Main Spans9
Year Built1982

Traffic

Avg Daily Traffic1,800 (2023)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number310001202703550

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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