Structure 310001207602390 · Washington County, MS

SR 12 over Sunflower River

Carries SR 12 over Sunflower River, Washington/humphreys Cl.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT572 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 6/9

572 ft end to end, longest span 150 ft: about 1.6 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 through truss.

Built194086 years old
Length571.9 ft174.3 m
Daily traffic2,200counted 2023
Last inspectedMay 2024every 12 months

Location

StateMississippi
CountyWashington
LocationWashington/humphreys Cl
CarriesSR 12
CrossesSunflower River
Coordinates33.18399, -90.68682

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length571.9 ft (174.3 m)
Max Span149.9 ft (45.7 m)
Deck Width25.6 ft (7.8 m)
Deck Area1359.5 sq m
Main Spans2
Year Built1940

Traffic

Avg Daily Traffic2,200 (2023)
Truck Traffic25%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number310001207602390

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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