US Bridges

Rt Z S over Courtois CR

Good

Iron County, Missouri · S 33 T 35 N R 1 W · Structure no. 7139

Built
1958
67 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
37 ft
3 main spans
Daily traffic
97
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Z S over Courtois CR is a concrete continuous culvert carrying Rt Z S over Courtois CR in Iron County, Missouri. It was built in 1958, so it is 67 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 97 vehicles a day, roughly 10% of them trucks, projected to reach 136 by 2044. The structure is 37 ft (11.3 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRt Z S
CrossesCourtois CR
LocationS 33 T 35 N R 1 W
RouteState Highway 0Z
Coordinates37.70757, -91.04231
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.6 US tons
Inventory rating27.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97 (2024)
Projected traffic136 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Rt Z S over Courtois CR built?

It was built in 1958, making it 67 years old in 2025.

What condition is Rt Z S over Courtois 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 Rt Z S over Courtois CR carry?

About 97 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt Z S over Courtois CR?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m) and a deck 28 ft wide.

Who owns Rt Z S over Courtois CR?

It is owned by the State Highway Agency.