US Bridges

Mo 366 W over Is 44 Rp IS270E to IS44

Good

St. Louis County, Missouri · S 14 T 44 N R 5 E · Structure no. 35858

Built
2018
7 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
302 ft
2 main spans
Daily traffic
32,909
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 366 W over Is 44 Rp IS270E to IS44 is a steel continuous stringer/multi-beam or girder carrying Mo 366 W over Is 44 Rp IS270E to IS44 in St. Louis County, Missouri. It was built in 2018, so it is 7 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32,909 vehicles a day, roughly 4% of them trucks, projected to reach 46,073 by 2044. The structure is 302 ft (92.1 m) long and 35 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesMo 366 W
CrossesIs 44 Rp IS270E to IS44
LocationS 14 T 44 N R 5 E
RouteState Highway 366
CountySt. Louis County
StateMissouri
Coordinates38.55368, -90.41933
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating93.3 US tons
Inventory rating55.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length302 ft (92.1 m)
Longest span162 ft (49.5 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,909 (2024)
Projected traffic46,073 by 2044
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mo 366 W over Is 44 Rp IS270E to IS44 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Mo 366 W over Is 44 Rp IS270E to IS44 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Mo 366 W over Is 44 Rp IS270E to IS44 carry?

About 32,909 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mo 366 W over Is 44 Rp IS270E to IS44?

The structure is 302 ft (92.1 m) long with a longest span of 162 ft (49.5 m) and a deck 35 ft wide.

Who owns Mo 366 W over Is 44 Rp IS270E to IS44?

It is owned by the State Highway Agency.