Structure SA1400000000057 · Coahoma County, MS

Mlk BLVD 4th ST over Sunflower River

Carries Mlk BLVD 4th ST over Sunflower River, Sec 23 T27n R 4w.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT521 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

521 ft end to end, longest span 100 ft: about 7 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.

Built200125 years old
Length521.0 ft158.8 m
Daily traffic5,400counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateMississippi
CountyCoahoma
LocationSec 23 T27n R 4w
CarriesMlk BLVD 4th ST
CrossesSunflower River
Coordinates34.19703, -90.57603

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length521.0 ft (158.8 m)
Max Span100.1 ft (30.5 m)
Deck Width39.0 ft (11.9 m)
Deck Area1889.7 sq m
Main Spans7
Year Built2001

Traffic

Avg Daily Traffic5,400 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberSA1400000000057

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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