US Bridges

Rt B N over King Br

Fair

Gasconade County, Missouri · S 20 T 41 N R 6 W · Structure no. 8692

Built
1932
93 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,177
2024 count
Owner
State
State Highway Agency

About this bridge

Rt B N over King Br is a concrete continuous culvert carrying Rt B N over King Br in Gasconade County, Missouri. It was built in 1932, so it is 93 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 1,177 vehicles a day, roughly 11% of them trucks, projected to reach 1,530 by 2044. The structure is 21 ft (6.5 m) long and 22 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesRt B N
CrossesKing Br
LocationS 20 T 41 N R 6 W
RouteState Highway 0B
CountyGasconade County
StateMissouri
Coordinates38.28707, -91.62381
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length21 ft (6.5 m)
Longest span10 ft (3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,177 (2024)
Projected traffic1,530 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$306,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt B N over King Br built?

It was built in 1932, making it 93 years old in 2025.

What condition is Rt B N over King Br 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 2024.

How much traffic does Rt B N over King Br carry?

About 1,177 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt B N over King Br?

The structure is 21 ft (6.5 m) long with a longest span of 10 ft (3 m) and a deck 22 ft wide.

Who owns Rt B N over King Br?

It is owned by the State Highway Agency.