US Bridges

Mo 370 E over NS RR

Fair

St. Charles County, Missouri · S 29 T 47 N R 4 E · Structure no. 4106

Built
1994
31 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
288 ft
3 main spans
Daily traffic
13,674
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 370 E over NS RR is a prestressed concrete continuous tee beam carrying Mo 370 E over NS RR in St. Charles County, Missouri. It was built in 1994, so it is 31 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 6 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 13,674 vehicles a day, roughly 5% of them trucks, projected to reach 23,246 by 2044. The structure is 288 ft (87.8 m) long and 70 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMo 370 E
CrossesNS RR
LocationS 29 T 47 N R 4 E
RouteState Highway 370
CountySt. Charles County
StateMissouri
Coordinates38.8033, -90.58968
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length288 ft (87.8 m)
Longest span112 ft (34.1 m)
Deck width70 ft (21.2 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,674 (2024)
Projected traffic23,246 by 2044
Trucks5%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 E over NS RR built?

It was built in 1994, making it 31 years old in 2025.

What condition is Mo 370 E over NS RR 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 October 2023.

How much traffic does Mo 370 E over NS RR carry?

About 13,674 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mo 370 E over NS RR?

The structure is 288 ft (87.8 m) long with a longest span of 112 ft (34.1 m) and a deck 70 ft wide.

Who owns Mo 370 E over NS RR?

It is owned by the State Highway Agency.