US Bridges

US 61 S over Plattin CR

Fair

Jefferson County, Missouri · S 1915 T 40 N R 6 E · Structure no. 4119

Built
1993
32 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
284 ft
4 main spans
Daily traffic
2,514
2024 count
Owner
State
State Highway Agency

About this bridge

US 61 S over Plattin CR is a steel continuous stringer/multi-beam or girder carrying US 61 S over Plattin CR in Jefferson County, Missouri. It was built in 1993, so it is 32 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,514 vehicles a day, roughly 15% of them trucks, projected to reach 4,525 by 2044. The structure is 284 ft (86.6 m) long and 41 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 61 S
CrossesPlattin CR
LocationS 1915 T 40 N R 6 E
RouteU.S. Route 61
CountyJefferson County
StateMissouri
Coordinates38.17818, -90.38873
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length284 ft (86.6 m)
Longest span98 ft (29.9 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,514 (2024)
Projected traffic4,525 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 US 61 S over Plattin CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 61 S over Plattin CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does US 61 S over Plattin CR carry?

About 2,514 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is US 61 S over Plattin CR?

The structure is 284 ft (86.6 m) long with a longest span of 98 ft (29.9 m) and a deck 41 ft wide.

Who owns US 61 S over Plattin CR?

It is owned by the State Highway Agency.