US Bridges

Mo 30 E over Is 270

FairPosted for load

St. Louis County, Missouri · S 3117 T 44 N R 6 E · Structure no. 827

Built
1966
59 years old, rebuilt 1996
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
266 ft
4 main spans
Daily traffic
38,793
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 30 E over Is 270 is a steel continuous stringer/multi-beam or girder carrying Mo 30 E over Is 270 in St. Louis County, Missouri. It was built in 1966 and reconstructed in 1996, so it is 59 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 38,793 vehicles a day, roughly 4% of them trucks, projected to reach 54,310 by 2044. The structure is 266 ft (81.1 m) long and 149 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMo 30 E
CrossesIs 270
LocationS 3117 T 44 N R 6 E
RouteState Highway 30
CountySt. Louis County
StateMissouri
Coordinates38.52516, -90.39867
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 rating56.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length266 ft (81.1 m)
Longest span77 ft (23.5 m)
Deck width149 ft (45.3 m)
Roadway width146 ft (44.5 m)
Vertical clearance over deck21 ft (6.5 m)

Traffic and service

Average daily traffic38,793 (2024)
Projected traffic54,310 by 2044
Trucks4%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 Mo 30 E over Is 270 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1996.

What condition is Mo 30 E over Is 270 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 2024.

How much traffic does Mo 30 E over Is 270 carry?

About 38,793 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mo 30 E over Is 270?

The structure is 266 ft (81.1 m) long with a longest span of 77 ft (23.5 m) and a deck 149 ft wide.

Who owns Mo 30 E over Is 270?

It is owned by the State Highway Agency.