Structure 11000200511189B · Newton County, MS

I 20 over Relief

Carries I 20 over Relief, 3.6 Mi E SR 503.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT360 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

360 ft end to end, longest span 40 ft: about 5 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.

Built1962rebuilt 2013
Length359.9 ft109.7 m
Daily traffic12,000counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateMississippi
CountyNewton
Location3.6 Mi E SR 503
CarriesI 20
CrossesRelief
Coordinates32.34245, -88.98168

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length359.9 ft (109.7 m)
Max Span40.0 ft (12.2 m)
Deck Width44.9 ft (13.7 m)
Deck Area1502.9 sq m
Main Spans9
Year Built1962 (reconstructed 2013)

Traffic

Avg Daily Traffic12,000 (2023)
Truck Traffic45%
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 Critical4 — Foundations need monitoring
Structure Number11000200511189B

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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