US Bridges

Aubuchon RD over Cowmire CR

FairPosted for load

St. Louis County, Missouri · S 24 T 46 N R 7 E · Structure no. 15538

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
47 ft
1 main span
Daily traffic
8,094
2024 count
Owner
County
County Highway Agency

About this bridge

Aubuchon RD over Cowmire CR is a steel stringer/multi-beam or girder carrying Aubuchon RD over Cowmire CR in St. Louis County, Missouri. It was built in 1964, so it is 61 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 8,094 vehicles a day, roughly 5% of them trucks, projected to reach 10,927 by 2044. The structure is 47 ft (14.3 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesAubuchon RD
CrossesCowmire CR
LocationS 24 T 46 N R 7 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.80025, -90.41148
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span44 ft (13.4 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,094 (2024)
Projected traffic10,927 by 2044
Trucks5%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$450,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Aubuchon RD over Cowmire CR built?

It was built in 1964, making it 61 years old in 2025.

What condition is Aubuchon RD over Cowmire 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 Aubuchon RD over Cowmire CR carry?

About 8,094 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Aubuchon RD over Cowmire CR?

The structure is 47 ft (14.3 m) long with a longest span of 44 ft (13.4 m) and a deck 24 ft wide.

Who owns Aubuchon RD over Cowmire CR?

It is owned by the County Highway Agency.