US Bridges

Rt N S over Similin CR

Fair

Laclede County, Missouri · S 28 T 35 N R 14 W · Structure no. 6936

Built
1957
68 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
37 ft
3 main spans
Daily traffic
564
2024 count
Owner
State
State Highway Agency

About this bridge

Rt N S over Similin CR is a concrete continuous culvert carrying Rt N S over Similin CR in Laclede County, Missouri. It was built in 1957, so it is 68 years old, older 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 564 vehicles a day, roughly 5% of them trucks, projected to reach 846 by 2044. The structure is 37 ft (11.4 m) long and 37 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesRt N S
CrossesSimilin CR
LocationS 28 T 35 N R 14 W
RouteState Highway 0N
CountyLaclede County
StateMissouri
Coordinates37.7388, -92.48675
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length37 ft (11.4 m)
Longest span12 ft (3.7 m)
Deck width37 ft (11.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic564 (2024)
Projected traffic846 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Rt N S over Similin CR built?

It was built in 1957, making it 68 years old in 2025.

What condition is Rt N S over Similin 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 August 2023.

How much traffic does Rt N S over Similin CR carry?

About 564 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Rt N S over Similin CR?

The structure is 37 ft (11.4 m) long with a longest span of 12 ft (3.7 m) and a deck 37 ft wide.

Who owns Rt N S over Similin CR?

It is owned by the State Highway Agency.