US Bridges

520 TH Road over Trib Mid Fk Grand

Good

Gentry County, Missouri · S 9 T 63 N R 31 W · Structure no. 32486

Built
2007
18 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

520 TH Road over Trib Mid Fk Grand is a steel stringer/multi-beam or girder carrying 520 TH Road over Trib Mid Fk Grand in Gentry County, Missouri. It was built in 2007, so it is 18 years old, younger 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 38 ft (11.6 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries520 TH Road
CrossesTrib Mid Fk Grand
LocationS 9 T 63 N R 31 W
RouteCounty Highway 231
CountyGentry County
StateMissouri
Coordinates40.27908, -94.40464
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span37 ft (11.3 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 520 TH Road over Trib Mid Fk Grand built?

It was built in 2007, making it 18 years old in 2025.

What condition is 520 TH Road over Trib Mid Fk Grand 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 2023.

How much traffic does 520 TH Road over Trib Mid Fk Grand carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 520 TH Road over Trib Mid Fk Grand?

The structure is 38 ft (11.6 m) long with a longest span of 37 ft (11.3 m) and a deck 20 ft wide.

Who owns 520 TH Road over Trib Mid Fk Grand?

It is owned by the County Highway Agency.