US Bridges

Defiance RD over Trib of Femme Osag

Fair

St. Charles County, Missouri · S 19 T 45 N R 2 E · Structure no. 23089

Built
1900
125 years old, rebuilt 1985
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
187
2024 count
Owner
County
County Highway Agency

About this bridge

Defiance RD over Trib of Femme Osag is a steel stringer/multi-beam or girder carrying Defiance RD over Trib of Femme Osag in St. Charles County, Missouri. It was built in 1900 and reconstructed in 1985, so it is 125 years old, older 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 5 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 187 vehicles a day, roughly 20% of them trucks, projected to reach 411 by 2044. The structure is 24 ft (7.3 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDefiance RD
CrossesTrib of Femme Osag
LocationS 19 T 45 N R 2 E
RouteCounty Highway 389
CountySt. Charles County
StateMissouri
Coordinates38.63153, -90.78356
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 rating110.1 US tons
Inventory rating68.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187 (2024)
Projected traffic411 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Defiance RD over Trib of Femme Osag built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1985.

What condition is Defiance RD over Trib of Femme Osag 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 February 2024.

How much traffic does Defiance RD over Trib of Femme Osag carry?

About 187 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Defiance RD over Trib of Femme Osag?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Defiance RD over Trib of Femme Osag?

It is owned by the County Highway Agency.