US Bridges

Is 270 W over Rp IS270E to MO370W

Fair

St. Louis County, Missouri · S 2038 T 47 N R 5 E · Structure no. 4014

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
265 ft
5 main spans
Daily traffic
53,809
2024 count
Owner
State
State Highway Agency

About this bridge

Is 270 W over Rp IS270E to MO370W is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 270 W over Rp IS270E to MO370W in St. Louis County, Missouri. It was built in 1990, so it is 35 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 53,809 vehicles a day, roughly 18% of them trucks, projected to reach 67,261 by 2044. The structure is 265 ft (80.8 m) long and 73 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 270 W
CrossesRp IS270E to MO370W
LocationS 2038 T 47 N R 5 E
RouteInterstate 270
CountySt. Louis County
StateMissouri
Coordinates38.7698, -90.40724
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length265 ft (80.8 m)
Longest span61 ft (18.6 m)
Deck width73 ft (22.1 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic53,809 (2024)
Projected traffic67,261 by 2044
Trucks18%
Lanes on structure5
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 270 W over Rp IS270E to MO370W built?

It was built in 1990, making it 35 years old in 2025.

What condition is Is 270 W over Rp IS270E to MO370W 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 August 2024.

How much traffic does Is 270 W over Rp IS270E to MO370W carry?

About 53,809 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 270 W over Rp IS270E to MO370W?

The structure is 265 ft (80.8 m) long with a longest span of 61 ft (18.6 m) and a deck 73 ft wide.

Who owns Is 270 W over Rp IS270E to MO370W?

It is owned by the State Highway Agency.