US Bridges

Johnson RD over Trib of Big Rvr

Fair

Jefferson County, Missouri · S 30 T 40 N R 3 E · Structure no. 22613

Built
1900
125 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

Johnson RD over Trib of Big Rvr is a concrete continuous slab carrying Johnson RD over Trib of Big Rvr in Jefferson County, Missouri. It was built in 1900, so it is 125 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 70 by 2043. The structure is 27 ft (8.2 m) long and 19 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesJohnson RD
CrossesTrib of Big Rvr
LocationS 30 T 40 N R 3 E
RouteCounty Highway 0
CountyJefferson County
StateMissouri
Coordinates38.16808, -90.73922
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionFebruary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length27 ft (8.2 m)
Longest span13 ft (4 m)
Deck width19 ft (5.8 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic70 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$185,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Johnson RD over Trib of Big Rvr built?

It was built in 1900, making it 125 years old in 2025.

What condition is Johnson RD over Trib of Big 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 February 2025.

How much traffic does Johnson RD over Trib of Big Rvr carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Johnson RD over Trib of Big Rvr?

The structure is 27 ft (8.2 m) long with a longest span of 13 ft (4 m) and a deck 19 ft wide.

Who owns Johnson RD over Trib of Big Rvr?

It is owned by the County Highway Agency.