US Bridges

Mo 370 W over Cst Premier Pkwy

Good

St. Charles County, Missouri · S 735 T 47 N R 4 E · Structure no. 4295

Built
1995
30 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
205 ft
3 main spans
Daily traffic
15,378
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 370 W over Cst Premier Pkwy is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 370 W over Cst Premier Pkwy in St. Charles County, Missouri. It was built in 1995, so it is 30 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 15,378 vehicles a day, roughly 5% of them trucks, projected to reach 26,143 by 2044. The structure is 205 ft (62.5 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMo 370 W
CrossesCst Premier Pkwy
LocationS 735 T 47 N R 4 E
RouteState Highway 370
Coordinates38.80787, -90.58869
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating66.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length205 ft (62.5 m)
Longest span71 ft (21.5 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,378 (2024)
Projected traffic26,143 by 2044
Trucks5%
Lanes on structure3
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 370 W over Cst Premier Pkwy built?

It was built in 1995, making it 30 years old in 2025.

What condition is Mo 370 W over Cst Premier Pkwy 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 2023.

How much traffic does Mo 370 W over Cst Premier Pkwy carry?

About 15,378 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mo 370 W over Cst Premier Pkwy?

The structure is 205 ft (62.5 m) long with a longest span of 71 ft (21.5 m) and a deck 60 ft wide.

Who owns Mo 370 W over Cst Premier Pkwy?

It is owned by the State Highway Agency.