Structure 110002002504590 · Hinds County, MS

I 20e I55n over Gallatin ST Lynch Ck

Carries I 20e I55n over Gallatin ST Lynch Ck, 0.8 Mi E I 55/i 20w.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT840 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 8/9

840 ft end to end, longest span 80 ft: about 2.3 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.

Built196660 years old
Length839.9 ft256 m
Daily traffic58,500counted 2023
Last inspectedAugust 2024every 24 months

Location

StateMississippi
CountyHinds
Location0.8 Mi E I 55/i 20w
CarriesI 20e I55n
CrossesGallatin ST Lynch Ck
Coordinates32.27568, -90.19356

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length839.9 ft (256 m)
Max Span80.1 ft (24.4 m)
Deck Width59.4 ft (18.1 m)
Deck Area4633.6 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic58,500 (2023)
Truck Traffic16%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number110002002504590

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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