US Bridges

Grant RD over Slagle CR

Fair

Polk County, Missouri · S 13 T 32 N R 23 W · Structure no. 34681

Built
2012
13 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
37 ft
4 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

Grant RD over Slagle CR is a concrete continuous slab carrying Grant RD over Slagle CR in Polk County, Missouri. It was built in 2012, so it is 13 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 37 ft (11.3 m) long and 23 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesGrant RD
CrossesSlagle CR
LocationS 13 T 32 N R 23 W
RouteCounty Highway 322
CountyPolk County
StateMissouri
Coordinates37.50494, -93.39836
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.5 US tons
Inventory rating38.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span8 ft (2.4 m)
Deck width23 ft (6.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Grant RD over Slagle CR built?

It was built in 2012, making it 13 years old in 2025.

What condition is Grant RD over Slagle 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 April 2024.

How much traffic does Grant RD over Slagle CR carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Grant RD over Slagle CR?

The structure is 37 ft (11.3 m) long with a longest span of 8 ft (2.4 m) and a deck 23 ft wide.

Who owns Grant RD over Slagle CR?

It is owned by the County Highway Agency.