US Bridges

Woodlawn Ave S over Is 70

Fair

St. Charles County, Missouri · S 29 T 47 N R 3 E · Structure no. 11920

Built
1999
26 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
239 ft
2 main spans
Daily traffic
5,572
2024 count
Owner
State
State Highway Agency

About this bridge

Woodlawn Ave S over Is 70 is a steel continuous stringer/multi-beam or girder carrying Woodlawn Ave S over Is 70 in St. Charles County, Missouri. It was built in 1999, so it is 26 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 5,572 vehicles a day, roughly 4% of them trucks, projected to reach 10,865 by 2044. The structure is 239 ft (72.8 m) long and 70 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWoodlawn Ave S
CrossesIs 70
LocationS 29 T 47 N R 3 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.80237, -90.70517
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length239 ft (72.8 m)
Longest span119 ft (36.4 m)
Deck width70 ft (21.2 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,572 (2024)
Projected traffic10,865 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Woodlawn Ave S over Is 70 built?

It was built in 1999, making it 26 years old in 2025.

What condition is Woodlawn Ave S over Is 70 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 September 2023.

How much traffic does Woodlawn Ave S over Is 70 carry?

About 5,572 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Woodlawn Ave S over Is 70?

The structure is 239 ft (72.8 m) long with a longest span of 119 ft (36.4 m) and a deck 70 ft wide.

Who owns Woodlawn Ave S over Is 70?

It is owned by the State Highway Agency.