US Bridges

Birdie Hills over Trib Dardenne CR

Fair

St. Charles County, Missouri · S 354 T 46 N R 3 E · Structure no. 30677

Built
2004
21 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
13,660
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Birdie Hills over Trib Dardenne CR is a concrete continuous culvert carrying Birdie Hills over Trib Dardenne CR in St. Charles County, Missouri. It was built in 2004, so it is 21 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 13,660 vehicles a day, roughly 3% of them trucks, projected to reach 21,173 by 2044. The structure is 21 ft (6.4 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBirdie Hills
CrossesTrib Dardenne CR
LocationS 354 T 46 N R 3 E
RouteCity Street 231
CountySt. Charles County
StateMissouri
Coordinates38.76725, -90.6613
Functional classUrban Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,660 (2024)
Projected traffic21,173 by 2044
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Birdie Hills over Trib Dardenne CR built?

It was built in 2004, making it 21 years old in 2025.

What condition is Birdie Hills over Trib Dardenne 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 January 2024.

How much traffic does Birdie Hills over Trib Dardenne CR carry?

About 13,660 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Birdie Hills over Trib Dardenne CR?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 40 ft wide.

Who owns Birdie Hills over Trib Dardenne CR?

It is owned by the City or Municipal Highway Agency.