US Bridges

Phoenix Pkwy over Br of Dardenne CR

Fair

St. Charles County, Missouri · S 1641 T 46 N R 3 E · Structure no. 28393

Built
1998
27 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
64 ft
5 main spans
Daily traffic
10,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Phoenix Pkwy over Br of Dardenne CR is a concrete culvert carrying Phoenix Pkwy over Br of Dardenne CR in St. Charles County, Missouri. It was built in 1998, so it is 27 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 10,000 vehicles a day, roughly 8% of them trucks, projected to reach 15,500 by 2044. The structure is 64 ft (19.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPhoenix Pkwy
CrossesBr of Dardenne CR
LocationS 1641 T 46 N R 3 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.74078, -90.73851
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2024)
Projected traffic15,500 by 2044
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Phoenix Pkwy over Br of Dardenne CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is Phoenix Pkwy over Br of 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 February 2024.

How much traffic does Phoenix Pkwy over Br of Dardenne CR carry?

About 10,000 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Phoenix Pkwy over Br of Dardenne CR?

The structure is 64 ft (19.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Phoenix Pkwy over Br of Dardenne CR?

It is owned by the City or Municipal Highway Agency.