Structure 21000490180493B · Forrest County, MS

US 49 over Black Creek

Carries US 49 over Black Creek, 7.2 Mi N SR 13.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · 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 FT680 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

680 ft end to end, longest span 90 ft: about 1.9 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 box-beam bridge.

Built195967 years old
Length680.1 ft207.3 m
Daily traffic7,000counted 2023
Last inspectedMarch 2024every 24 months

Location

StateMississippi
CountyForrest
Location7.2 Mi N SR 13
CarriesUS 49
CrossesBlack Creek
Coordinates31.05136, -89.20392

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length680.1 ft (207.3 m)
Max Span89.9 ft (27.4 m)
Deck Width32.8 ft (10 m)
Deck Area2,073 sq m
Main Spans3
Year Built1959

Traffic

Avg Daily Traffic7,000 (2023)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number21000490180493B

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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