US Bridges

US 63 S over Gasconade Rvr

Fair

Maries County, Missouri · S 2 T 39 N R 9 W · Structure no. 3128

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
995 ft
3 main spans
Daily traffic
5,331
2024 count
Owner
State
State Highway Agency

About this bridge

US 63 S over Gasconade Rvr is a steel continuous stringer/multi-beam or girder carrying US 63 S over Gasconade Rvr in Maries County, Missouri. It was built in 1978, so it is 47 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 5 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 5,331 vehicles a day, roughly 13% of them trucks, projected to reach 9,329 by 2044. The structure is 995 ft (303.3 m) long and 47 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesUS 63 S
CrossesGasconade Rvr
LocationS 2 T 39 N R 9 W
RouteU.S. Route 63
Coordinates38.14638, -91.88243
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.6 US tons
Inventory rating30.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+9 approach)
Design loadHS 20 + Mod
Structure length995 ft (303.3 m)
Longest span160 ft (48.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,331 (2024)
Projected traffic9,329 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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 Gasconade Rvr built?

It was built in 1978, making it 47 years old in 2025.

What condition is US 63 S over Gasconade Rvr 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 June 2024.

How much traffic does US 63 S over Gasconade Rvr carry?

About 5,331 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is US 63 S over Gasconade Rvr?

The structure is 995 ft (303.3 m) long with a longest span of 160 ft (48.8 m) and a deck 47 ft wide.

Who owns US 63 S over Gasconade Rvr?

It is owned by the State Highway Agency.