US Bridges

7th ST over Koen CR

Good

St. Francois County, Missouri · S 10 T 36 N R 5 E · Structure no. 31191

Built
2004
21 years old
Condition
Good
inspected December 2024
Type
Arch - Deck
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
510
2023 count
Owner
County
County Highway Agency

About this bridge

7th ST over Koen CR is a concrete continuous arch - deck carrying 7th ST over Koen CR in St. Francois County, Missouri. It was built in 2004, so it is 21 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 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 510 vehicles a day, roughly 10% of them trucks, projected to reach 765 by 2043. The structure is 90 ft (27.4 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries7th ST
CrossesKoen CR
LocationS 10 T 36 N R 5 E
RouteCity Street 0
Coordinates37.85687, -90.49519
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span28 ft (8.5 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2023)
Projected traffic765 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 7th ST over Koen CR built?

It was built in 2004, making it 21 years old in 2025.

What condition is 7th ST over Koen 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 December 2024.

How much traffic does 7th ST over Koen CR carry?

About 510 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 7th ST over Koen CR?

The structure is 90 ft (27.4 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.

Who owns 7th ST over Koen CR?

It is owned by the County Highway Agency.