US Bridges

Maryville Centre D over Is 64

Poor

St. Louis County, Missouri · S 18 T 45 N R 5 E · Structure no. 3575

Built
1985
40 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
273 ft
2 main spans
Daily traffic
9,850
2024 count
Owner
State
State Highway Agency

About this bridge

Maryville Centre D over Is 64 is a steel continuous stringer/multi-beam or girder carrying Maryville Centre D over Is 64 in St. Louis County, Missouri. It was built in 1985, so it is 40 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 9,850 vehicles a day, roughly 5% of them trucks, projected to reach 14,775 by 2044. The structure is 273 ft (83.2 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMaryville Centre D
CrossesIs 64
LocationS 18 T 45 N R 5 E
RouteCity Street 0
CountySt. Louis County
StateMissouri
Coordinates38.63951, -90.49839
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
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 rating66.5 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 length273 ft (83.2 m)
Longest span112 ft (34.1 m)
Deck width70 ft (21.2 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,850 (2024)
Projected traffic14,775 by 2044
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Maryville Centre D over Is 64 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Maryville Centre D over Is 64 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Maryville Centre D over Is 64 carry?

About 9,850 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Maryville Centre D over Is 64?

The structure is 273 ft (83.2 m) long with a longest span of 112 ft (34.1 m) and a deck 70 ft wide.

Who owns Maryville Centre D over Is 64?

It is owned by the State Highway Agency.