US Bridges

Is 64 W over Is 270 Rp IS270E to IS6

Fair

St. Louis County, Missouri · S 15 T 45 N R 5 E · Structure no. 3808

Built
1988
37 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,236 ft
8 main spans
Daily traffic
68,183
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 W over Is 270 Rp IS270E to IS6 is a steel continuous stringer/multi-beam or girder carrying Is 64 W over Is 270 Rp IS270E to IS6 in St. Louis County, Missouri. It was built in 1988, so it is 37 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 68,183 vehicles a day, roughly 12% of them trucks, projected to reach 85,229 by 2044. The structure is 1,236 ft (376.7 m) long and 53 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 64 W
CrossesIs 270 Rp IS270E to IS6
LocationS 15 T 45 N R 5 E
RouteInterstate 64
CountySt. Louis County
StateMissouri
Coordinates38.63905, -90.44965
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8 (+5 approach)
Design loadHS 20 + Mod
Structure length1,236 ft (376.7 m)
Longest span144 ft (43.9 m)
Deck width53 ft (16.3 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68,183 (2024)
Projected traffic85,229 by 2044
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 64 W over Is 270 Rp IS270E to IS6 built?

It was built in 1988, making it 37 years old in 2025.

What condition is Is 64 W over Is 270 Rp IS270E to IS6 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 December 2024.

How much traffic does Is 64 W over Is 270 Rp IS270E to IS6 carry?

About 68,183 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 64 W over Is 270 Rp IS270E to IS6?

The structure is 1,236 ft (376.7 m) long with a longest span of 144 ft (43.9 m) and a deck 53 ft wide.

Who owns Is 64 W over Is 270 Rp IS270E to IS6?

It is owned by the State Highway Agency.