US Bridges

Blank RD over Unknown Creek

FairPosted for load

Moniteau County, Missouri · S 29 T 44 N R 14 W · Structure no. 19740

Built
1943
82 years old, rebuilt 1999
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

Blank RD over Unknown Creek is a steel stringer/multi-beam or girder carrying Blank RD over Unknown Creek in Moniteau County, Missouri. It was built in 1943 and reconstructed in 1999, so it is 82 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. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, roughly 10% of them trucks, projected to reach 56 by 2044. The structure is 37 ft (11.4 m) long and 20 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesBlank RD
CrossesUnknown Creek
LocationS 29 T 44 N R 14 W
RouteCounty Highway 232
CountyMoniteau County
StateMissouri
Coordinates38.53972, -92.47911
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
Deck7 GoodSome minor problems.
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating11.9 US tons
Inventory rating6.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length37 ft (11.4 m)
Longest span37 ft (11.4 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic56 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$327,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blank RD over Unknown Creek built?

It was built in 1943, making it 82 years old in 2025. It was reconstructed in 1999.

What condition is Blank 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 November 2023.

How much traffic does Blank RD over Unknown Creek carry?

About 40 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Blank RD over Unknown Creek?

The structure is 37 ft (11.4 m) long with a longest span of 37 ft (11.4 m) and a deck 20 ft wide.

Who owns Blank RD over Unknown Creek?

It is owned by the County Highway Agency.