US Bridges

Mo 370 E over Cst Missouri Bottom RD

Fair

St. Louis County, Missouri · S 2038 T 47 N R 5 E · Structure no. 3986

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
358 ft
3 main spans
Daily traffic
46,401
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 370 E over Cst Missouri Bottom RD is a steel continuous stringer/multi-beam or girder carrying Mo 370 E over Cst Missouri Bottom RD in St. Louis County, Missouri. It was built in 1990, so it is 35 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 46,401 vehicles a day, roughly 5% of them trucks, projected to reach 58,001 by 2044. The structure is 358 ft (109.1 m) long and 115 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMo 370 E
CrossesCst Missouri Bottom RD
LocationS 2038 T 47 N R 5 E
RouteState Highway 370
CountySt. Louis County
StateMissouri
Coordinates38.78941, -90.42462
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 rating70.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length358 ft (109.1 m)
Longest span124 ft (37.8 m)
Deck width115 ft (35.2 m)
Roadway width110 ft (33.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,401 (2024)
Projected traffic58,001 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 370 E over Cst Missouri Bottom RD built?

It was built in 1990, making it 35 years old in 2025.

What condition is Mo 370 E over Cst Missouri Bottom RD 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 August 2024.

How much traffic does Mo 370 E over Cst Missouri Bottom RD carry?

About 46,401 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mo 370 E over Cst Missouri Bottom RD?

The structure is 358 ft (109.1 m) long with a longest span of 124 ft (37.8 m) and a deck 115 ft wide.

Who owns Mo 370 E over Cst Missouri Bottom RD?

It is owned by the State Highway Agency.