US Bridges

Mount Olive RD over Trib of Mcmullin B

Fair

Jefferson County, Missouri · S 18 T 39 N R 5 E · Structure no. 21874

Built
1900
125 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
650
2023 count
Owner
County
County Highway Agency

About this bridge

Mount Olive RD over Trib of Mcmullin B is a concrete continuous culvert carrying Mount Olive RD over Trib of Mcmullin B 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.

It carries about 650 vehicles a day, roughly 5% of them trucks, projected to reach 1,300 by 2043. The structure is 28 ft (8.5 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMount Olive RD
CrossesTrib of Mcmullin B
LocationS 18 T 39 N R 5 E
RouteCounty Highway 326
CountyJefferson County
StateMissouri
Coordinates38.09564, -90.51247
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
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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment6: Equal to present minimum 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 length28 ft (8.5 m)
Longest span13 ft (4 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic1,300 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Mount Olive RD over Trib of Mcmullin B built?

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

What condition is Mount Olive RD over Trib of Mcmullin B 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 Mount Olive RD over Trib of Mcmullin B carry?

About 650 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mount Olive RD over Trib of Mcmullin B?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4 m) and a deck 26 ft wide.

Who owns Mount Olive RD over Trib of Mcmullin B?

It is owned by the County Highway Agency.