US Bridges

Mel Wetter Pkwy S over Mo 370

Fair

St. Charles County, Missouri · S 3280 T 46 N R 4 E · Structure no. 31756

Built
2005
20 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
508 ft
6 main spans
Daily traffic
7,322
2024 count
Owner
State
State Highway Agency

About this bridge

Mel Wetter Pkwy S over Mo 370 is a steel continuous stringer/multi-beam or girder carrying Mel Wetter Pkwy S over Mo 370 in St. Charles County, Missouri. It was built in 2005, so it is 20 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 7,322 vehicles a day, roughly 5% of them trucks, projected to reach 14,278 by 2044. The structure is 508 ft (154.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMel Wetter Pkwy S
CrossesMo 370
LocationS 3280 T 46 N R 4 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.8066, -90.4817
Functional classUrban Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 rating82.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length508 ft (154.8 m)
Longest span110 ft (33.5 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,322 (2024)
Projected traffic14,278 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Mel Wetter Pkwy S over Mo 370 built?

It was built in 2005, making it 20 years old in 2025.

What condition is Mel Wetter Pkwy S over Mo 370 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 Mel Wetter Pkwy S over Mo 370 carry?

About 7,322 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mel Wetter Pkwy S over Mo 370?

The structure is 508 ft (154.8 m) long with a longest span of 110 ft (33.5 m) and a deck 64 ft wide.

Who owns Mel Wetter Pkwy S over Mo 370?

It is owned by the State Highway Agency.