US Bridges

Kilburn Bridge RD over Gasconade Rvr

Good

Webster County, Missouri · S 2 T 31 N R 17 W · Structure no. 17458

Built
1991
34 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
175 ft
3 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

Kilburn Bridge RD over Gasconade Rvr is a steel stringer/multi-beam or girder carrying Kilburn Bridge RD over Gasconade Rvr in Webster County, Missouri. It was built in 1991, so it is 34 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 66 by 2043. The structure is 175 ft (53.3 m) long and 17 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesKilburn Bridge RD
CrossesGasconade Rvr
LocationS 2 T 31 N R 17 W
RouteCounty Highway 153
CountyWebster County
StateMissouri
Coordinates37.4375, -92.76895
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length175 ft (53.3 m)
Longest span75 ft (22.9 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic66 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Kilburn Bridge RD over Gasconade Rvr built?

It was built in 1991, making it 34 years old in 2025.

What condition is Kilburn Bridge RD over Gasconade Rvr 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 April 2023.

How much traffic does Kilburn Bridge RD over Gasconade Rvr carry?

About 40 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Kilburn Bridge RD over Gasconade Rvr?

The structure is 175 ft (53.3 m) long with a longest span of 75 ft (22.9 m) and a deck 17 ft wide.

Who owns Kilburn Bridge RD over Gasconade Rvr?

It is owned by the County Highway Agency.