US Bridges

Mo 366 E over Gravois CR

Good

St. Louis County, Missouri · S 8 T 44 N R 6 E · Structure no. 37401

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
18,756
2023 count
Owner
State
State Highway Agency

About this bridge

Mo 366 E over Gravois CR is a prestressed concrete box beam or girders - single or spread carrying Mo 366 E over Gravois CR in St. Louis County, Missouri. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: new structure not yet open to traffic.

It carries about 18,756 vehicles a day, roughly 13% of them trucks, projected to reach 26,258 by 2043. The structure is 75 ft (22.9 m) long and 88 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMo 366 E
CrossesGravois CR
LocationS 8 T 44 N R 6 E
RouteState Highway 366
CountySt. Louis County
StateMissouri
Coordinates38.56114, -90.37109
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusNew structure not yet open to traffic
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span72 ft (21.8 m)
Deck width88 ft (26.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,756 (2023)
Projected traffic26,258 by 2043
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 366 E over Gravois CR built?

It was built in 2024, making it 1 years old in 2025.

What condition is Mo 366 E over Gravois CR 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 October 2024.

How much traffic does Mo 366 E over Gravois CR carry?

About 18,756 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Mo 366 E over Gravois CR?

The structure is 75 ft (22.9 m) long with a longest span of 72 ft (21.8 m) and a deck 88 ft wide.

Who owns Mo 366 E over Gravois CR?

It is owned by the State Highway Agency.