US Bridges

County RD S-111 over Slagle CR

Good

Polk County, Missouri · S 14 T 32 N R 23 W · Structure no. 21686

Built
1993
32 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
150
2024 count
Owner
County
County Highway Agency

About this bridge

County RD S-111 over Slagle CR is a prestressed concrete stringer/multi-beam or girder carrying County RD S-111 over Slagle CR in Polk County, Missouri. It was built in 1993, so it is 32 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 218 by 2044. The structure is 192 ft (58.5 m) long and 26 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesCounty RD S-111
CrossesSlagle CR
LocationS 14 T 32 N R 23 W
RouteCounty Highway 319
Coordinates37.50348, -93.42966
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.4 US tons
Inventory rating61.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span70 ft (21.3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic218 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD S-111 over Slagle CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is County RD S-111 over Slagle 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 April 2024.

How much traffic does County RD S-111 over Slagle CR carry?

About 150 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD S-111 over Slagle CR?

The structure is 192 ft (58.5 m) long with a longest span of 70 ft (21.3 m) and a deck 26 ft wide.

Who owns County RD S-111 over Slagle CR?

It is owned by the County Highway Agency.