US Bridges

Spencer RD over Spencer CR

Fair

St. Charles County, Missouri · S 1731 T 47 N R 4 E · Structure no. 28500

Built
1996
29 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
5,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Spencer RD over Spencer CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Spencer RD over Spencer CR 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 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 7,750 by 2044. The structure is 127 ft (38.7 m) long and 73 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSpencer RD
CrossesSpencer CR
LocationS 1731 T 47 N R 4 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.79583, -90.60472
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating59.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span49 ft (14.8 m)
Deck width73 ft (22.2 m)
Roadway width64 ft (19.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2024)
Projected traffic7,750 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Spencer RD over Spencer CR built?

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

What condition is Spencer RD over Spencer CR 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 January 2024.

How much traffic does Spencer RD over Spencer CR carry?

About 5,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Spencer RD over Spencer CR?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.8 m) and a deck 73 ft wide.

Who owns Spencer RD over Spencer CR?

It is owned by the City or Municipal Highway Agency.