US Bridges

Mo 100 E over Is 270 Rp MO100E to IS2

Fair

St. Louis County, Missouri · S 34 T 45 N R 5 E · Structure no. 711

Built
1962
63 years old, rebuilt 2000
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
298 ft
4 main spans
Daily traffic
23,192
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 100 E over Is 270 Rp MO100E to IS2 is a steel continuous stringer/multi-beam or girder carrying Mo 100 E over Is 270 Rp MO100E to IS2 in St. Louis County, Missouri. It was built in 1962 and reconstructed in 2000, so it is 63 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.

It carries about 23,192 vehicles a day, roughly 13% of them trucks, projected to reach 32,469 by 2044. The structure is 298 ft (90.8 m) long and 96 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMo 100 E
CrossesIs 270 Rp MO100E to IS2
LocationS 34 T 45 N R 5 E
RouteState Highway 100
CountySt. Louis County
StateMissouri
Coordinates38.60264, -90.45052
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 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 rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length298 ft (90.8 m)
Longest span83 ft (25.3 m)
Deck width96 ft (29.3 m)
Roadway width87 ft (26.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,192 (2024)
Projected traffic32,469 by 2044
Trucks13%
Lanes on structure5
Traffic directionOne-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 100 E over Is 270 Rp MO100E to IS2 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2000.

What condition is Mo 100 E over Is 270 Rp MO100E to IS2 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 100 E over Is 270 Rp MO100E to IS2 carry?

About 23,192 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 100 E over Is 270 Rp MO100E to IS2?

The structure is 298 ft (90.8 m) long with a longest span of 83 ft (25.3 m) and a deck 96 ft wide.

Who owns Mo 100 E over Is 270 Rp MO100E to IS2?

It is owned by the State Highway Agency.