US Bridges

Plattin RD over Trib to Plattin CR

Good

Jefferson County, Missouri · S 6 T 39 N R 6 E · Structure no. 31845

Built
2007
18 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
500
2023 count
Owner
County
County Highway Agency

About this bridge

Plattin RD over Trib to Plattin CR is a prestressed concrete box beam or girders - multiple carrying Plattin RD over Trib to Plattin CR in Jefferson County, Missouri. It was built in 2007, so it is 18 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 500 vehicles a day, roughly 5% of them trucks, projected to reach 1,000 by 2043. The structure is 66 ft (20.1 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesPlattin RD
CrossesTrib to Plattin CR
LocationS 6 T 39 N R 6 E
RouteCounty Highway 340
Coordinates38.14138, -90.40731
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.4 US tons
Inventory rating42.7 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span63 ft (19.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic1,000 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Plattin RD over Trib to Plattin CR built?

It was built in 2007, making it 18 years old in 2025.

What condition is Plattin RD over Trib to Plattin 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 January 2025.

How much traffic does Plattin RD over Trib to Plattin CR carry?

About 500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Plattin RD over Trib to Plattin CR?

The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 30 ft wide.

Who owns Plattin RD over Trib to Plattin CR?

It is owned by the County Highway Agency.