US Bridges

Is 70 E over Cst Grand Blvd

Fair

St. Louis city, Missouri · S 14 T 46 N R 7 E · Structure no. 11805

Built
1999
26 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
192 ft
3 main spans
Daily traffic
95,308
2024 count
Owner
State
State Highway Agency

About this bridge

Is 70 E over Cst Grand Blvd is a steel continuous stringer/multi-beam or girder carrying Is 70 E over Cst Grand Blvd in St. Louis city, Missouri. It was built in 1999, so it is 26 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 5 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 95,308 vehicles a day, roughly 18% of them trucks, projected to reach 119,135 by 2044. The structure is 192 ft (58.5 m) long and 158 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 70 E
CrossesCst Grand Blvd
LocationS 14 T 46 N R 7 E
RouteInterstate 70
Coordinates38.67301, -90.20432
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating38.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length192 ft (58.5 m)
Longest span85 ft (25.9 m)
Deck width158 ft (48.3 m)
Roadway width152 ft (46.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95,308 (2024)
Projected traffic119,135 by 2044
Trucks18%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 70 E over Cst Grand Blvd built?

It was built in 1999, making it 26 years old in 2025.

What condition is Is 70 E over Cst Grand Blvd 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 July 2023.

How much traffic does Is 70 E over Cst Grand Blvd carry?

About 95,308 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Is 70 E over Cst Grand Blvd?

The structure is 192 ft (58.5 m) long with a longest span of 85 ft (25.9 m) and a deck 158 ft wide.

Who owns Is 70 E over Cst Grand Blvd?

It is owned by the State Highway Agency.