US Bridges

Mo 21 S over Carver CR

Good

Iron County, Missouri · S 4 T 32 N R 3 E · Structure no. 35807

Built
2018
7 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
104 ft
3 main spans
Daily traffic
864
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 21 S over Carver CR is a prestressed concrete continuous tee beam carrying Mo 21 S over Carver CR in Iron County, Missouri. It was built in 2018, so it is 7 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 864 vehicles a day, roughly 18% of them trucks, projected to reach 1,296 by 2044. The structure is 104 ft (31.7 m) long and 29 ft wide. If it were closed, the detour would be 46 mi (74 km).

CarriesMo 21 S
CrossesCarver CR
LocationS 4 T 32 N R 3 E
RouteState Highway 21
Coordinates37.48447, -90.72773
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.3 US tons
Inventory rating51.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length104 ft (31.7 m)
Longest span38 ft (11.6 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic864 (2024)
Projected traffic1,296 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46 mi (74 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 21 S over Carver CR built?

It was built in 2018, making it 7 years old in 2025.

What condition is Mo 21 S over Carver CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

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

About 864 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Mo 21 S over Carver CR?

The structure is 104 ft (31.7 m) long with a longest span of 38 ft (11.6 m) and a deck 29 ft wide.

Who owns Mo 21 S over Carver CR?

It is owned by the State Highway Agency.