US Bridges

Defiance RD over Femme Osage CR

Fair

St. Charles County, Missouri · S 303 T 45 N R 2 E · Structure no. 23057

Built
1990
35 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
3 main spans
Daily traffic
218
2024 count
Owner
County
County Highway Agency

About this bridge

Defiance RD over Femme Osage CR is a prestressed concrete stringer/multi-beam or girder carrying Defiance RD over Femme Osage CR in St. Charles County, Missouri. It was built in 1990, so it is 35 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 218 vehicles a day, roughly 10% of them trucks, projected to reach 480 by 2044. The structure is 213 ft (64.9 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesDefiance RD
CrossesFemme Osage CR
LocationS 303 T 45 N R 2 E
RouteCounty Highway 388
CountySt. Charles County
StateMissouri
Coordinates38.63842, -90.80529
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
Deck7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic218 (2024)
Projected traffic480 by 2044
Trucks10%
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

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 Defiance RD over Femme Osage CR built?

It was built in 1990, making it 35 years old in 2025.

What condition is Defiance RD over Femme Osage 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 February 2024.

How much traffic does Defiance RD over Femme Osage CR carry?

About 218 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Defiance RD over Femme Osage CR?

The structure is 213 ft (64.9 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns Defiance RD over Femme Osage CR?

It is owned by the County Highway Agency.