US Bridges

Boyd Branch RD over Boyd CR

Fair

Jefferson County, Missouri · S 34 T 39 N R 5 E · Structure no. 22383

Built
1940
85 years old, rebuilt 1970
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

Boyd Branch RD over Boyd CR is a concrete culvert carrying Boyd Branch RD over Boyd CR in Jefferson County, Missouri. It was built in 1940 and reconstructed in 1970, so it is 85 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 175 vehicles a day, roughly 2% of them trucks, projected to reach 350 by 2043. The structure is 24 ft (7.3 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesBoyd Branch RD
CrossesBoyd CR
LocationS 34 T 39 N R 5 E
RouteCounty Highway 351
CountyJefferson County
StateMissouri
Coordinates38.04514, -90.4571
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 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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic350 by 2043
Trucks2%
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 Boyd Branch RD over Boyd CR built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1970.

What condition is Boyd Branch RD over Boyd CR 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 Boyd Branch RD over Boyd CR carry?

About 175 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Boyd Branch RD over Boyd CR?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 25 ft wide.

Who owns Boyd Branch RD over Boyd CR?

It is owned by the County Highway Agency.