US Bridges

Clarmar LN over Timber Br

FairPosted for load

Adair County, Missouri · S 36 T 62 N R 14 W · Structure no. 20938

Built
1925
100 years old
Condition
Fair
inspected February 2024
Type
Girder and Floorbeam System
Steel
Length
35 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Clarmar LN over Timber Br is a steel girder and floorbeam system carrying Clarmar LN over Timber Br in Adair County, Missouri. It was built in 1925, so it is 100 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 35 ft (10.7 m) long and 15 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesClarmar LN
CrossesTimber Br
LocationS 36 T 62 N R 14 W
RouteCounty Highway 281
CountyAdair County
StateMissouri
Coordinates40.12623, -92.40237
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating21.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width15 ft (4.5 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$311,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Clarmar LN over Timber Br built?

It was built in 1925, making it 100 years old in 2025.

What condition is Clarmar LN over Timber Br 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 2024.

How much traffic does Clarmar LN over Timber Br carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Clarmar LN over Timber Br?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 15 ft wide.

Who owns Clarmar LN over Timber Br?

It is owned by the County Highway Agency.