US Bridges

Koch Valley RD over Trib of Mississipp

FairPosted for load

Jefferson County, Missouri · S 6 T 41 N R 6 E · Structure no. 19288

Built
1900
125 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Koch Valley RD over Trib of Mississipp is a concrete continuous culvert carrying Koch Valley RD over Trib of Mississipp 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 170 by 2043. The structure is 22 ft (6.7 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesKoch Valley RD
CrossesTrib of Mississipp
LocationS 6 T 41 N R 6 E
RouteCounty Highway 191
CountyJefferson County
StateMissouri
Coordinates38.31782, -90.38884
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic170 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-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 Koch Valley RD over Trib of Mississipp built?

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

What condition is Koch Valley RD over Trib of Mississipp 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 Koch Valley RD over Trib of Mississipp carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Koch Valley RD over Trib of Mississipp?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 22 ft wide.

Who owns Koch Valley RD over Trib of Mississipp?

It is owned by the County Highway Agency.