US Bridges

ST Johns RD over Browns Br of Duboi

Fair

Franklin County, Missouri · S 7 T 43 N R 1 E · Structure no. 15949

Built
2000
25 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
450
2023 count
Owner
County
County Highway Agency

About this bridge

ST Johns RD over Browns Br of Duboi is a concrete culvert carrying ST Johns RD over Browns Br of Duboi in Franklin County, Missouri. It was built in 2000, so it is 25 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 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 450 vehicles a day, roughly 5% of them trucks, projected to reach 810 by 2043. The structure is 34 ft (10.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST Johns RD
CrossesBrowns Br of Duboi
LocationS 7 T 43 N R 1 E
RouteCounty Highway 104
CountyFranklin County
StateMissouri
Coordinates38.49186, -90.94281
Functional classRural Minor 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 inspectionJanuary 2025
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 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 rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width34 ft (10.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic810 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 ST Johns RD over Browns Br of Duboi built?

It was built in 2000, making it 25 years old in 2025.

What condition is ST Johns RD over Browns Br of Duboi 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 January 2025.

How much traffic does ST Johns RD over Browns Br of Duboi carry?

About 450 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is ST Johns RD over Browns Br of Duboi?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 34 ft wide.

Who owns ST Johns RD over Browns Br of Duboi?

It is owned by the County Highway Agency.