US Bridges

Sonderen ST over Belleau CR

Good

St. Charles County, Missouri · S 33 T 47 N R 3 E · Structure no. 32954

Built
2008
17 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
5,700
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sonderen ST over Belleau CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Sonderen ST over Belleau CR in St. Charles County, Missouri. It was built in 2008, so it is 17 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 5,700 vehicles a day, roughly 3% of them trucks, projected to reach 8,835 by 2044. The structure is 174 ft (53 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSonderen ST
CrossesBelleau CR
LocationS 33 T 47 N R 3 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.79336, -90.69075
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.5 US tons
Inventory rating38.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length174 ft (53 m)
Longest span66 ft (20.1 m)
Deck width42 ft (12.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2024)
Projected traffic8,835 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sonderen ST over Belleau CR built?

It was built in 2008, making it 17 years old in 2025.

What condition is Sonderen ST over Belleau 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 February 2024.

How much traffic does Sonderen ST over Belleau CR carry?

About 5,700 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Sonderen ST over Belleau CR?

The structure is 174 ft (53 m) long with a longest span of 66 ft (20.1 m) and a deck 42 ft wide.

Who owns Sonderen ST over Belleau CR?

It is owned by the City or Municipal Highway Agency.