US Bridges

County RD 930 over Conrad CR

FairPosted for load

Bollinger County, Missouri · S 5 T 33 N R 9 E · Structure no. 12242

Built
1920
105 years old, rebuilt 2010
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 930 over Conrad CR is a steel stringer/multi-beam or girder carrying County RD 930 over Conrad CR in Bollinger County, Missouri. It was built in 1920 and reconstructed in 2010, so it is 105 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 46 by 2044. The structure is 26 ft (7.8 m) long and 15 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty RD 930
CrossesConrad CR
LocationS 5 T 33 N R 9 E
RouteCounty Highway 3
CountyBollinger County
StateMissouri
Coordinates37.58604, -90.06951
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26.8 US tons
Inventory rating15.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span24 ft (7.3 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic46 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 930 over Conrad CR built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2010.

What condition is County RD 930 over Conrad 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 November 2024.

How much traffic does County RD 930 over Conrad CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 930 over Conrad CR?

The structure is 26 ft (7.8 m) long with a longest span of 24 ft (7.3 m) and a deck 15 ft wide.

Who owns County RD 930 over Conrad CR?

It is owned by the County Highway Agency.