US Bridges

County RD 575 over Trib of Drywood CR

Good

Vernon County, Missouri · S 3 T 34 N R 33 W · Structure no. 25254

Built
1950
75 years old, rebuilt 2011
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 575 over Trib of Drywood CR is a steel stringer/multi-beam or girder carrying County RD 575 over Trib of Drywood CR in Vernon County, Missouri. It was built in 1950 and reconstructed in 2011, so it is 75 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5 vehicles a day, roughly 10% of them trucks, projected to reach 7 by 2044. The structure is 52 ft (15.8 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCounty RD 575
CrossesTrib of Drywood CR
LocationS 3 T 34 N R 33 W
RouteCounty Highway 723
CountyVernon County
StateMissouri
Coordinates37.73048, -94.53675
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating33.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 10
Structure length52 ft (15.8 m)
Longest span23 ft (7 m)
Deck width12 ft (3.6 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic7 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$283,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 575 over Trib of Drywood CR built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2011.

What condition is County RD 575 over Trib of Drywood CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does County RD 575 over Trib of Drywood CR carry?

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

How long is County RD 575 over Trib of Drywood CR?

The structure is 52 ft (15.8 m) long with a longest span of 23 ft (7 m) and a deck 12 ft wide.

Who owns County RD 575 over Trib of Drywood CR?

It is owned by the County Highway Agency.