US Bridges

Darst Bottom RD over Trib of Femme Osag

Fair

St. Charles County, Missouri · S 44 T 45 N R 2 E · Structure no. 23137

Built
1991
34 years old
Condition
Fair
inspected February 2024
Type
Culvert
Steel
Length
26 ft
3 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Darst Bottom RD over Trib of Femme Osag is a steel culvert carrying Darst Bottom RD over Trib of Femme Osag in St. Charles County, Missouri. It was built in 1991, so it is 34 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 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 35 vehicles a day, roughly 25% of them trucks, projected to reach 77 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDarst Bottom RD
CrossesTrib of Femme Osag
LocationS 44 T 45 N R 2 E
RouteCounty Highway 392
CountySt. Charles County
StateMissouri
Coordinates38.64019, -90.77139
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.7 US tons
Inventory rating27.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadOther
Structure length26 ft (7.9 m)
Longest span8 ft (2.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic77 by 2044
Trucks25%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 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 Darst Bottom RD over Trib of Femme Osag built?

It was built in 1991, making it 34 years old in 2025.

What condition is Darst Bottom 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 Darst Bottom RD over Trib of Femme Osag carry?

About 35 vehicles per day (2024 count), of which roughly 25% are trucks.

How long is Darst Bottom RD over Trib of Femme Osag?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.3 m).

Who owns Darst Bottom RD over Trib of Femme Osag?

It is owned by the County Highway Agency.