US Bridges

NW 20th RD over Trib of Drywood CR

Fair

Barton County, Missouri · S 8 T 32 N R 32 W · Structure no. 19638

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

NW 20th RD over Trib of Drywood CR is a steel stringer/multi-beam or girder carrying NW 20th RD over Trib of Drywood CR in Barton County, Missouri. It was built in 1980, so it is 45 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 41 ft (12.5 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW 20th RD
CrossesTrib of Drywood CR
LocationS 8 T 32 N R 32 W
RouteCounty Highway 228
CountyBarton County
StateMissouri
Coordinates37.53466, -94.46664
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width19 ft (5.9 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 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 20th RD over Trib of Drywood CR built?

It was built in 1980, making it 45 years old in 2025.

What condition is NW 20th 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 20th RD over Trib of Drywood CR carry?

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

How long is NW 20th RD over Trib of Drywood CR?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 19 ft wide.

Who owns NW 20th RD over Trib of Drywood CR?

It is owned by the County Highway Agency.