US Bridges

US 63 S over Rocky Fk CR

Fair

Boone County, Missouri · S 13 T 49 N R 13 W · Structure no. 479

Built
1963
62 years old, rebuilt 1992
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
246 ft
3 main spans
Daily traffic
8,814
2024 count
Owner
State
State Highway Agency

About this bridge

US 63 S over Rocky Fk CR is a steel continuous stringer/multi-beam or girder carrying US 63 S over Rocky Fk CR in Boone County, Missouri. It was built in 1963 and reconstructed in 1992, so it is 62 years old, older 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 8,814 vehicles a day, roughly 12% of them trucks, projected to reach 14,543 by 2044. The structure is 246 ft (75 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 63 S
CrossesRocky Fk CR
LocationS 13 T 49 N R 13 W
RouteU.S. Route 63
CountyBoone County
StateMissouri
Coordinates39.03804, -92.33129
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20 + Mod
Structure length246 ft (75 m)
Longest span72 ft (22 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,814 (2024)
Projected traffic14,543 by 2044
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 63 S over Rocky Fk CR built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1992.

What condition is US 63 S over Rocky Fk 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 September 2023.

How much traffic does US 63 S over Rocky Fk CR carry?

About 8,814 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is US 63 S over Rocky Fk CR?

The structure is 246 ft (75 m) long with a longest span of 72 ft (22 m) and a deck 40 ft wide.

Who owns US 63 S over Rocky Fk CR?

It is owned by the State Highway Agency.