US Bridges

Chesterfield Pkwy over Is 64

Fair

St. Louis County, Missouri · S 10 T 45 N R 4 E · Structure no. 3842

Built
1990
35 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
283 ft
2 main spans
Daily traffic
11,036
2024 count
Owner
State
State Highway Agency

About this bridge

Chesterfield Pkwy over Is 64 is a steel continuous stringer/multi-beam or girder carrying Chesterfield Pkwy over Is 64 in St. Louis County, Missouri. It was built in 1990, so it is 35 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 11,036 vehicles a day, roughly 10% of them trucks, projected to reach 16,554 by 2044. The structure is 283 ft (86.3 m) long and 81 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesChesterfield Pkwy
CrossesIs 64
LocationS 10 T 45 N R 4 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.6507, -90.55029
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length283 ft (86.3 m)
Longest span112 ft (34.1 m)
Deck width81 ft (24.8 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,036 (2024)
Projected traffic16,554 by 2044
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 Chesterfield Pkwy over Is 64 built?

It was built in 1990, making it 35 years old in 2025.

What condition is Chesterfield Pkwy over Is 64 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 2024.

How much traffic does Chesterfield Pkwy over Is 64 carry?

About 11,036 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Chesterfield Pkwy over Is 64?

The structure is 283 ft (86.3 m) long with a longest span of 112 ft (34.1 m) and a deck 81 ft wide.

Who owns Chesterfield Pkwy over Is 64?

It is owned by the State Highway Agency.