US Bridges

Is 64 W over Missouri Rvr Katy Trail

Fair

St. Louis County, Missouri · S 34 T 46 N R 3 E · Structure no. 3303

Built
1991
34 years old, rebuilt 2001
Condition
Fair
inspected June 2023
Type
Truss - Thru
Steel Continuous
Length
2,614 ft
4 main spans
Daily traffic
46,479
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 W over Missouri Rvr Katy Trail is a steel continuous truss - thru carrying Is 64 W over Missouri Rvr Katy Trail in St. Louis County, Missouri. It was built in 1991 and reconstructed in 2001, so it is 34 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 46,479 vehicles a day, roughly 8% of them trucks, projected to reach 58,099 by 2044. The structure is 2,614 ft (796.7 m) long and 51 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 64 W
CrossesMissouri Rvr Katy Trail
LocationS 34 T 46 N R 3 E
RouteInterstate 64
CountySt. Louis County
StateMissouri
Coordinates38.68802, -90.66315
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating41.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+4 approach)
Design loadHS 20 + Mod
Structure length2,614 ft (796.7 m)
Longest span513 ft (156.5 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic46,479 (2024)
Projected traffic58,099 by 2044
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$86.2 million (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Is 64 W over Missouri Rvr Katy Trail built?

It was built in 1991, making it 34 years old in 2025. It was reconstructed in 2001.

What condition is Is 64 W over Missouri Rvr Katy Trail 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 June 2023.

How much traffic does Is 64 W over Missouri Rvr Katy Trail carry?

About 46,479 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Is 64 W over Missouri Rvr Katy Trail?

The structure is 2,614 ft (796.7 m) long with a longest span of 513 ft (156.5 m) and a deck 51 ft wide.

Who owns Is 64 W over Missouri Rvr Katy Trail?

It is owned by the State Highway Agency.