US Bridges

County RD SW 871 over Trib Little Clear

Fair

St. Clair County, Missouri · S 18 T 37 N R 27 W · Structure no. 35901

Built
2018
7 years old
Condition
Fair
inspected December 2023
Type
Culvert
Steel Continuous
Length
23 ft
2 main spans
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

County RD SW 871 over Trib Little Clear is a steel continuous culvert carrying County RD SW 871 over Trib Little Clear in St. Clair County, Missouri. It was built in 2018, so it is 7 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 24 by 2043. The structure is 23 ft (7.1 m) long and 17 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty RD SW 871
CrossesTrib Little Clear
LocationS 18 T 37 N R 27 W
RouteCounty Highway 323
CountySt. Clair County
StateMissouri
Coordinates37.97244, -93.94667
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7.1 m)
Longest span9 ft (2.8 m)
Deck width17 ft (5.2 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic24 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 County RD SW 871 over Trib Little Clear built?

It was built in 2018, making it 7 years old in 2025.

What condition is County RD SW 871 over Trib Little Clear 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 December 2023.

How much traffic does County RD SW 871 over Trib Little Clear carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD SW 871 over Trib Little Clear?

The structure is 23 ft (7.1 m) long with a longest span of 9 ft (2.8 m) and a deck 17 ft wide.

Who owns County RD SW 871 over Trib Little Clear?

It is owned by the County Highway Agency.