US Bridges

NW 40th RD over Trib Drywood CR

Fair

Barton County, Missouri · S 32 T 33 N R 31 W · Structure no. 16958

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
27 ft
3 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

NW 40th RD over Trib Drywood CR is a concrete slab carrying NW 40th RD over Trib Drywood CR in Barton County, Missouri. It was built in 1984, so it is 41 years old, younger 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2043. The structure is 27 ft (8.2 m) long and 21 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNW 40th RD
CrossesTrib Drywood CR
LocationS 32 T 33 N R 31 W
RouteCounty Highway 138
CountyBarton County
StateMissouri
Coordinates37.56081, -94.35411
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length27 ft (8.2 m)
Longest span9 ft (2.7 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic35 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 NW 40th RD over Trib Drywood CR built?

It was built in 1984, making it 41 years old in 2025.

What condition is NW 40th RD over Trib Drywood 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 March 2023.

How much traffic does NW 40th RD over Trib Drywood CR carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 40th RD over Trib Drywood CR?

The structure is 27 ft (8.2 m) long with a longest span of 9 ft (2.7 m) and a deck 21 ft wide.

Who owns NW 40th RD over Trib Drywood CR?

It is owned by the County Highway Agency.