US Bridges

NW 80th RD over Trib Drywood CR

PoorPosted for load

Barton County, Missouri · S 16 T 33 N R 33 W · Structure no. 15129

Built
1900
125 years old
Condition
Poor
inspected April 2023
Type
Truss - Thru
Steel
Length
118 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

NW 80th RD over Trib Drywood CR is a steel truss - thru carrying NW 80th RD over Trib Drywood CR in Barton County, Missouri. It was built in 1900, so it is 125 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 42 by 2043. The structure is 118 ft (36 m) long and 12 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNW 80th RD
CrossesTrib Drywood CR
LocationS 16 T 33 N R 33 W
RouteCounty Highway 86
CountyBarton County
StateMissouri
Coordinates37.624, -94.56033
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.9 US tons
Inventory rating5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+4 approach)
Design loadOther
Structure length118 ft (36 m)
Longest span50 ft (15.2 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic42 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$821,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 80th RD over Trib Drywood CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is NW 80th RD over Trib Drywood CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does NW 80th RD over Trib Drywood CR carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 80th RD over Trib Drywood CR?

The structure is 118 ft (36 m) long with a longest span of 50 ft (15.2 m) and a deck 12 ft wide.

Who owns NW 80th RD over Trib Drywood CR?

It is owned by the County Highway Agency.