US Bridges

Mid Rivers Mall DR over Dardenne CR

Fair

St. Charles County, Missouri · S 12 T 46 N R 3 E · Structure no. 28740

Built
1990
35 years old, rebuilt 2019
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
228 ft
3 main spans
Daily traffic
20,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mid Rivers Mall DR over Dardenne CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mid Rivers Mall DR over Dardenne CR in St. Charles County, Missouri. It was built in 1990 and reconstructed in 2019, 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 20,000 vehicles a day, roughly 5% of them trucks, projected to reach 31,000 by 2044. The structure is 228 ft (69.5 m) long and 91 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMid Rivers Mall DR
CrossesDardenne CR
LocationS 12 T 46 N R 3 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.75639, -90.63667
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.3 US tons
Inventory rating52.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length228 ft (69.5 m)
Longest span75 ft (23 m)
Deck width91 ft (27.7 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2024)
Projected traffic31,000 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Mid Rivers Mall DR over Dardenne CR built?

It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2019.

What condition is Mid Rivers Mall DR over 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 Mid Rivers Mall DR over Dardenne CR carry?

About 20,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mid Rivers Mall DR over Dardenne CR?

The structure is 228 ft (69.5 m) long with a longest span of 75 ft (23 m) and a deck 91 ft wide.

Who owns Mid Rivers Mall DR over Dardenne CR?

It is owned by the City or Municipal Highway Agency.