US Bridges

Prospect RD E over Is 64

Good

St. Charles County, Missouri · S 29 T 47 N R 2 E · Structure no. 31841

Built
2009
16 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
9,446
2024 count
Owner
State
State Highway Agency

About this bridge

Prospect RD E over Is 64 is a prestressed concrete continuous tee beam carrying Prospect RD E over Is 64 in St. Charles County, Missouri. It was built in 2009, so it is 16 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 9,446 vehicles a day, roughly 5% of them trucks, projected to reach 17,003 by 2044. The structure is 233 ft (70.9 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesProspect RD E
CrossesIs 64
LocationS 29 T 47 N R 2 E
RouteCity Street 0
Coordinates38.79598, -90.81926
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.
Superstructure8 Very GoodNo problems noted.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating41.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length233 ft (70.9 m)
Longest span113 ft (34.4 m)
Deck width50 ft (15.3 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,446 (2024)
Projected traffic17,003 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Prospect RD E over Is 64 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Prospect RD E 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 Prospect RD E over Is 64 carry?

About 9,446 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Prospect RD E over Is 64?

The structure is 233 ft (70.9 m) long with a longest span of 113 ft (34.4 m) and a deck 50 ft wide.

Who owns Prospect RD E over Is 64?

It is owned by the State Highway Agency.