US Bridges

Is 64 E over Is 170

Good

St. Louis County, Missouri · S 21 T 45 N R 6 E · Structure no. 32265

Built
2008
17 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
155,924
2024 count
Owner
State
State Highway Agency

About this bridge

Is 64 E over Is 170 is a prestressed concrete tee beam carrying Is 64 E over Is 170 in St. Louis County, Missouri. It was built in 2008, so it is 17 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 155,924 vehicles a day, roughly 12% of them trucks, projected to reach 194,905 by 2044. The structure is 93 ft (28.2 m) long and 111 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 64 E
CrossesIs 170
LocationS 21 T 45 N R 6 E
RouteInterstate 64
Coordinates38.62971, -90.34373
Functional classUrban Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 rating78.4 US tons
Inventory rating39.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.2 m)
Longest span93 ft (28.2 m)
Deck width111 ft (33.7 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic155,924 (2024)
Projected traffic194,905 by 2044
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 64 E over Is 170 built?

It was built in 2008, making it 17 years old in 2025.

What condition is Is 64 E over Is 170 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 2024.

How much traffic does Is 64 E over Is 170 carry?

About 155,924 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 64 E over Is 170?

The structure is 93 ft (28.2 m) long with a longest span of 93 ft (28.2 m) and a deck 111 ft wide.

Who owns Is 64 E over Is 170?

It is owned by the State Highway Agency.