US Bridges

Mo 21 S over Stouts CR

Fair

Iron County, Missouri · S 5 T 33 N R 4 E · Structure no. 1091

Built
1967
58 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
256 ft
3 main spans
Daily traffic
3,870
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 21 S over Stouts CR is a steel continuous stringer/multi-beam or girder carrying Mo 21 S over Stouts CR in Iron County, Missouri. It was built in 1967, so it is 58 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 6 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 3,870 vehicles a day, roughly 18% of them trucks, projected to reach 5,805 by 2044. The structure is 256 ft (78 m) long and 35 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesMo 21 S
CrossesStouts CR
LocationS 5 T 33 N R 4 E
RouteState Highway 21
CountyIron County
StateMissouri
Coordinates37.59493, -90.62449
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length256 ft (78 m)
Longest span100 ft (30.5 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,870 (2024)
Projected traffic5,805 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 21 S over Stouts CR built?

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

What condition is Mo 21 S over Stouts CR 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 2023.

How much traffic does Mo 21 S over Stouts CR carry?

About 3,870 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Mo 21 S over Stouts CR?

The structure is 256 ft (78 m) long with a longest span of 100 ft (30.5 m) and a deck 35 ft wide.

Who owns Mo 21 S over Stouts CR?

It is owned by the State Highway Agency.