US Bridges

Lake ST Louis Blvd over Is 64

Good

St. Charles County, Missouri · S 35 T 47 N R 2 E · Structure no. 4256

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
282 ft
2 main spans
Daily traffic
15,891
2024 count
Owner
State
State Highway Agency

About this bridge

Lake ST Louis Blvd over Is 64 is a steel continuous stringer/multi-beam or girder carrying Lake ST Louis Blvd over Is 64 in St. Charles County, Missouri. It was built in 1996, so it is 29 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 15,891 vehicles a day, roughly 6% of them trucks, projected to reach 28,604 by 2044. The structure is 282 ft (86 m) long and 71 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLake ST Louis Blvd
CrossesIs 64
LocationS 35 T 47 N R 2 E
RouteCity Street 0
Coordinates38.78184, -90.79595
Functional classUrban Minor Arterial

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length282 ft (86 m)
Longest span114 ft (34.7 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,891 (2024)
Projected traffic28,604 by 2044
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed11.8 mi (19 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 Lake ST Louis Blvd over Is 64 built?

It was built in 1996, making it 29 years old in 2025.

What condition is Lake ST Louis Blvd over Is 64 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 September 2023.

How much traffic does Lake ST Louis Blvd over Is 64 carry?

About 15,891 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Lake ST Louis Blvd over Is 64?

The structure is 282 ft (86 m) long with a longest span of 114 ft (34.7 m) and a deck 71 ft wide.

Who owns Lake ST Louis Blvd over Is 64?

It is owned by the State Highway Agency.