US Bridges

Mo 13 S over Coon CR

Good

St. Clair County, Missouri · S 1 T 36 N R 25 W · Structure no. 31634

Built
2006
19 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
192 ft
3 main spans
Daily traffic
6,560
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 13 S over Coon CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 13 S over Coon CR in St. Clair County, Missouri. It was built in 2006, so it is 19 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 6,560 vehicles a day, roughly 31% of them trucks, projected to reach 11,480 by 2044. The structure is 192 ft (58.4 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMo 13 S
CrossesCoon CR
LocationS 1 T 36 N R 25 W
RouteState Highway 13
Coordinates37.90275, -93.62772
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating52.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length192 ft (58.4 m)
Longest span69 ft (21 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,560 (2024)
Projected traffic11,480 by 2044
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 13 S over Coon CR built?

It was built in 2006, making it 19 years old in 2025.

What condition is Mo 13 S over Coon 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 September 2024.

How much traffic does Mo 13 S over Coon CR carry?

About 6,560 vehicles per day (2024 count), of which roughly 31% are trucks.

How long is Mo 13 S over Coon CR?

The structure is 192 ft (58.4 m) long with a longest span of 69 ft (21 m) and a deck 41 ft wide.

Who owns Mo 13 S over Coon CR?

It is owned by the State Highway Agency.