US Bridges

Henning RD over Dardenne CR

Fair

St. Charles County, Missouri · S 1641 T 45 N R 3 E · Structure no. 33197

Built
2011
14 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
306 ft
3 main spans
Daily traffic
4,122
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Henning RD over Dardenne CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Henning RD over Dardenne CR in St. Charles County, Missouri. It was built in 2011, so it is 14 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 4,122 vehicles a day, roughly 2% of them trucks, projected to reach 6,389 by 2044. The structure is 306 ft (93.3 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHenning RD
CrossesDardenne CR
LocationS 1641 T 45 N R 3 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.73663, -90.72196
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
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 evaluation7: Better than 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 rating76.4 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length306 ft (93.3 m)
Longest span101 ft (30.8 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,122 (2024)
Projected traffic6,389 by 2044
Trucks2%
Lanes on structure2
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 byCounty 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 Henning RD over Dardenne CR built?

It was built in 2011, making it 14 years old in 2025.

What condition is Henning RD 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 Henning RD over Dardenne CR carry?

About 4,122 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Henning RD over Dardenne CR?

The structure is 306 ft (93.3 m) long with a longest span of 101 ft (30.8 m) and a deck 40 ft wide.

Who owns Henning RD over Dardenne CR?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.