US Bridges

Technology DR over Trib of Dardenne C

Fair

St. Charles County, Missouri · S 1669 T 46 N R 3 E · Structure no. 20717

Built
1993
32 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
800
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Technology DR over Trib of Dardenne C is a steel stringer/multi-beam or girder carrying Technology DR over Trib of Dardenne C in St. Charles County, Missouri. It was built in 1993, so it is 32 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 800 vehicles a day, roughly 10% of them trucks, projected to reach 1,240 by 2044. The structure is 40 ft (12.2 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTechnology DR
CrossesTrib of Dardenne C
LocationS 1669 T 46 N R 3 E
RouteCity Street 272
CountySt. Charles County
StateMissouri
Coordinates38.7188, -90.69813
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating76.4 US tons
Inventory rating38.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2024)
Projected traffic1,240 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Technology DR over Trib of Dardenne C built?

It was built in 1993, making it 32 years old in 2025.

What condition is Technology DR over Trib of Dardenne C 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 Technology DR over Trib of Dardenne C carry?

About 800 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Technology DR over Trib of Dardenne C?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.

Who owns Technology DR over Trib of Dardenne C?

It is owned by the City or Municipal Highway Agency.