US Bridges

US 63 S over US 63C Cst Conley RD

Fair

Boone County, Missouri · S 8 T 48 N R 12 W · Structure no. 3364

Built
1993
32 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
256 ft
4 main spans
Daily traffic
12,240
2024 count
Owner
State
State Highway Agency

About this bridge

US 63 S over US 63C Cst Conley RD is a prestressed concrete continuous stringer/multi-beam or girder carrying US 63 S over US 63C Cst Conley RD in Boone County, Missouri. It was built in 1993, so it is 32 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 12,240 vehicles a day, roughly 6% of them trucks, projected to reach 20,196 by 2044. The structure is 256 ft (78 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 63 S
CrossesUS 63C Cst Conley RD
LocationS 8 T 48 N R 12 W
RouteU.S. Route 63
Coordinates38.95741, -92.29339
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length256 ft (78 m)
Longest span70 ft (21.3 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,240 (2024)
Projected traffic20,196 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 63 S over US 63C Cst Conley RD built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 63 S over US 63C Cst Conley RD 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 September 2023.

How much traffic does US 63 S over US 63C Cst Conley RD carry?

About 12,240 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is US 63 S over US 63C Cst Conley RD?

The structure is 256 ft (78 m) long with a longest span of 70 ft (21.3 m) and a deck 41 ft wide.

Who owns US 63 S over US 63C Cst Conley RD?

It is owned by the State Highway Agency.