US Bridges

SR 475 over I 20

Fair

Rankin County, Mississippi · SR 475 over I 20 · Structure no. 31004750610025A

Built
1967
58 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
312 ft
4 main spans
Daily traffic
5,500
2023 count
Owner
State
State Highway Agency

About this bridge

SR 475 over I 20 is a concrete continuous box beam or girders - single or spread carrying SR 475 over I 20 in Rankin County, Mississippi. It was built in 1967, so it is 58 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,500 vehicles a day, roughly 2% of them trucks, projected to reach 6,000 by 2043. The structure is 312 ft (95.1 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 475
CrossesI 20
LocationSR 475 over I 20
RouteState Highway 475
CountyRankin County
StateMississippi
Coordinates32.27184, -90.07325
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating71.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length312 ft (95.1 m)
Longest span90 ft (27.4 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2023)
Projected traffic6,000 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 475 over I 20 built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 475 over I 20 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does SR 475 over I 20 carry?

About 5,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR 475 over I 20?

The structure is 312 ft (95.1 m) long with a longest span of 90 ft (27.4 m) and a deck 32 ft wide.

Who owns SR 475 over I 20?

It is owned by the State Highway Agency.