US Bridges

Is 64 W over Dardenne CR

Good

St. Charles County, Missouri · S 1641 T 46 N R 2 E · Structure no. 31276

Built
2005
20 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
213 ft
3 main spans
Daily traffic
30,200
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 W over Dardenne CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 64 W over Dardenne CR in St. Charles County, Missouri. It was built in 2005, so it is 20 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30,200 vehicles a day, roughly 7% of them trucks, projected to reach 51,340 by 2044. The structure is 213 ft (64.8 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 64 W
CrossesDardenne CR
LocationS 1641 T 46 N R 2 E
RouteInterstate 64
CountySt. Charles County
StateMissouri
Coordinates38.73472, -90.73979
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length213 ft (64.8 m)
Longest span76 ft (23.2 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,200 (2024)
Projected traffic51,340 by 2044
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Is 64 W over Dardenne CR built?

It was built in 2005, making it 20 years old in 2025.

What condition is Is 64 W over Dardenne CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Is 64 W over Dardenne CR carry?

About 30,200 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Is 64 W over Dardenne CR?

The structure is 213 ft (64.8 m) long with a longest span of 76 ft (23.2 m) and a deck 62 ft wide.

Who owns Is 64 W over Dardenne CR?

It is owned by the State Highway Agency.