US Bridges

Chambers RD over BNSF RR

FairPosted for load

St. Louis County, Missouri · S 3 T 46 N R 7 E · Structure no. 15548

Built
1936
89 years old, rebuilt 1991
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
138 ft
3 main spans
Daily traffic
8,937
2024 count
Owner
County
County Highway Agency

About this bridge

Chambers RD over BNSF RR is a prestressed concrete continuous stringer/multi-beam or girder carrying Chambers RD over BNSF RR in St. Louis County, Missouri. It was built in 1936 and reconstructed in 1991, so it is 89 years old, older 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. Its operating status is: posted for load restriction.

It carries about 8,937 vehicles a day, roughly 5% of them trucks, projected to reach 12,065 by 2044. The structure is 138 ft (42.1 m) long and 65 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesChambers RD
CrossesBNSF RR
LocationS 3 T 46 N R 7 E
RouteCounty Highway 0
Coordinates38.74905, -90.21985
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating67.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length138 ft (42.1 m)
Longest span47 ft (14.3 m)
Deck width65 ft (19.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,937 (2024)
Projected traffic12,065 by 2044
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Chambers RD over BNSF RR built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1991.

What condition is Chambers RD over BNSF RR 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 Chambers RD over BNSF RR carry?

About 8,937 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Chambers RD over BNSF RR?

The structure is 138 ft (42.1 m) long with a longest span of 47 ft (14.3 m) and a deck 65 ft wide.

Who owns Chambers RD over BNSF RR?

It is owned by the County Highway Agency.