US Bridges

Is 64 W over UP RR Bonhomme CR

FairPosted for load

St. Louis County, Missouri · S 2031 T 45 N R 4 E · Structure no. 1371

Built
1968
57 years old, rebuilt 1987
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
285 ft
3 main spans
Daily traffic
49,794
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 W over UP RR Bonhomme CR is a steel continuous stringer/multi-beam or girder carrying Is 64 W over UP RR Bonhomme CR in St. Louis County, Missouri. It was built in 1968 and reconstructed in 1987, so it is 57 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 5 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 49,794 vehicles a day, roughly 8% of them trucks, projected to reach 62,243 by 2044. The structure is 285 ft (86.9 m) long and 53 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 64 W
CrossesUP RR Bonhomme CR
LocationS 2031 T 45 N R 4 E
RouteInterstate 64
Coordinates38.66507, -90.57307
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating34.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20
Structure length285 ft (86.9 m)
Longest span98 ft (29.8 m)
Deck width53 ft (16.3 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,794 (2024)
Projected traffic62,243 by 2044
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Is 64 W over UP RR Bonhomme CR built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1987.

What condition is Is 64 W over UP RR Bonhomme 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 October 2024.

How much traffic does Is 64 W over UP RR Bonhomme CR carry?

About 49,794 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Is 64 W over UP RR Bonhomme CR?

The structure is 285 ft (86.9 m) long with a longest span of 98 ft (29.8 m) and a deck 53 ft wide.

Who owns Is 64 W over UP RR Bonhomme CR?

It is owned by the State Highway Agency.