Structure 5570485P0000000 · Adams County, MS

Natchez Trace Park over Liberty Road

Carries Natchez Trace Park over Liberty Road, At South End Of Parkway..

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT227 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

227 ft end to end: about 3 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 box-beam bridge.

Built200422 years old
Length227.0 ft69.2 m
Daily traffic266counted 2024
Last inspectedJune 2024every 24 months

Location

StateMississippi
CountyAdams
LocationAt South End Of Parkway.
CarriesNatchez Trace Park
CrossesLiberty Road
Coordinates31.54525, -91.36903

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length227.0 ft (69.2 m)
Max Span157.2 ft (47.9 m)
Deck Width37.1 ft (11.3 m)
Deck Area782.0 sq m
Main Spans1
Year Built2004

Traffic

Avg Daily Traffic266 (2024)
Lanes On Bridge2
Lanes Under Bridge3

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerNational Park Service
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number5570485P0000000

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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