US Bridges

NW 30th RD over Trib of Drywood CR

Fair

Barton County, Missouri · S 5 T 32 N R 32 W · Structure no. 19328

Built
1974
51 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
62 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

NW 30th RD over Trib of Drywood CR is a steel continuous stringer/multi-beam or girder carrying NW 30th RD over Trib of Drywood CR in Barton County, Missouri. It was built in 1974, so it is 51 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2043. The structure is 62 ft (18.9 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNW 30th RD
CrossesTrib of Drywood CR
LocationS 5 T 32 N R 32 W
RouteCounty Highway 218
Coordinates37.54918, -94.46181
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.3 US tons
Inventory rating62.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic140 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 30th RD over Trib of Drywood CR built?

It was built in 1974, making it 51 years old in 2025.

What condition is NW 30th RD over Trib of 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 30th RD over Trib of Drywood CR carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 30th RD over Trib of Drywood CR?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 26 ft wide.

Who owns NW 30th RD over Trib of Drywood CR?

It is owned by the County Highway Agency.