US Bridges

Beacon RD over Unknown Creek

Fair

Miller County, Missouri · S 6 T 41 N R 15 W · Structure no. 14737

Built
1950
75 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

Beacon RD over Unknown Creek is a concrete culvert carrying Beacon RD over Unknown Creek in Miller County, Missouri. It was built in 1950, so it is 75 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 68 by 2043. The structure is 24 ft (7.3 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBeacon RD
CrossesUnknown Creek
LocationS 6 T 41 N R 15 W
RouteCounty Highway 74
CountyMiller County
StateMissouri
Coordinates38.34786, -92.62308
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic68 by 2043
Trucks10%
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 Beacon RD over Unknown Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Beacon RD over Unknown Creek 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 Beacon RD over Unknown Creek carry?

About 40 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Beacon RD over Unknown Creek?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m) and a deck 33 ft wide.

Who owns Beacon RD over Unknown Creek?

It is owned by the County Highway Agency.