US Bridges

Mo 79 S over Belleau CR

Fair

St. Charles County, Missouri · S 749 T 47 N R 3 E · Structure no. 31353

Built
2006
19 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
148 ft
3 main spans
Daily traffic
8,679
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 79 S over Belleau CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 79 S over Belleau CR in St. Charles County, Missouri. It was built in 2006, so it is 19 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 8,679 vehicles a day, roughly 14% of them trucks, projected to reach 15,622 by 2044. The structure is 148 ft (45 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMo 79 S
CrossesBelleau CR
LocationS 749 T 47 N R 3 E
RouteState Highway 79
CountySt. Charles County
StateMissouri
Coordinates38.81921, -90.65557
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.3 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length148 ft (45 m)
Longest span49 ft (15 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,679 (2024)
Projected traffic15,622 by 2044
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mo 79 S over Belleau CR built?

It was built in 2006, making it 19 years old in 2025.

What condition is Mo 79 S over Belleau 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 September 2023.

How much traffic does Mo 79 S over Belleau CR carry?

About 8,679 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Mo 79 S over Belleau CR?

The structure is 148 ft (45 m) long with a longest span of 49 ft (15 m) and a deck 43 ft wide.

Who owns Mo 79 S over Belleau CR?

It is owned by the State Highway Agency.