US Bridges

401 S over Is 57

Fair

Mississippi County, Missouri · S 11 T 26 N R 15 E · Structure no. 307

Built
1959
66 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
224 ft
4 main spans
Daily traffic
352
2024 count
Owner
State
State Highway Agency

About this bridge

401 S over Is 57 is a steel continuous stringer/multi-beam or girder carrying 401 S over Is 57 in Mississippi County, Missouri. It was built in 1959, so it is 66 years old, older than the Missouri average of 45.1 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 352 vehicles a day, roughly 9% of them trucks, projected to reach 493 by 2044. The structure is 224 ft (68.3 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
Carries401 S
CrossesIs 57
LocationS 11 T 26 N R 15 E
RouteCounty Highway 401
CountyMississippi County
StateMissouri
Coordinates36.90623, -89.39247
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length224 ft (68.3 m)
Longest span66 ft (20.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic352 (2024)
Projected traffic493 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 401 S over Is 57 built?

It was built in 1959, making it 66 years old in 2025.

What condition is 401 S over Is 57 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 November 2023.

How much traffic does 401 S over Is 57 carry?

About 352 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is 401 S over Is 57?

The structure is 224 ft (68.3 m) long with a longest span of 66 ft (20.1 m) and a deck 27 ft wide.

Who owns 401 S over Is 57?

It is owned by the State Highway Agency.