US Bridges

558 TH Road over Chalk CR

Fair

Gentry County, Missouri · S 25 T 64 N R 31 W · Structure no. 33190

Built
2010
15 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

558 TH Road over Chalk CR is a steel stringer/multi-beam or girder carrying 558 TH Road over Chalk CR in Gentry County, Missouri. It was built in 2010, so it is 15 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 29 by 2044. The structure is 76 ft (23.3 m) long and 20 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
Carries558 TH Road
CrossesChalk CR
LocationS 25 T 64 N R 31 W
RouteCounty Highway 125
CountyGentry County
StateMissouri
Coordinates40.32175, -94.33489
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span74 ft (22.7 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic29 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 558 TH Road over Chalk CR built?

It was built in 2010, making it 15 years old in 2025.

What condition is 558 TH Road over Chalk 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 January 2023.

How much traffic does 558 TH Road over Chalk CR carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 558 TH Road over Chalk CR?

The structure is 76 ft (23.3 m) long with a longest span of 74 ft (22.7 m) and a deck 20 ft wide.

Who owns 558 TH Road over Chalk CR?

It is owned by the County Highway Agency.