US Bridges

Rt B S over N Cobb CR

Fair

Laclede County, Missouri · S 2 T 33 N R 15 W · Structure no. 9790

Built
1947
78 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
46 ft
5 main spans
Daily traffic
1,099
2024 count
Owner
State
State Highway Agency

About this bridge

Rt B S over N Cobb CR is a concrete continuous culvert carrying Rt B S over N Cobb CR in Laclede County, Missouri. It was built in 1947, so it is 78 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 5 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 1,099 vehicles a day, roughly 10% of them trucks, projected to reach 1,649 by 2044. The structure is 46 ft (14.1 m) long and 23 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesRt B S
CrossesN Cobb CR
LocationS 2 T 33 N R 15 W
RouteState Highway 0B
CountyLaclede County
StateMissouri
Coordinates37.60151, -92.54417
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 10
Structure length46 ft (14.1 m)
Longest span8 ft (2.4 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,099 (2024)
Projected traffic1,649 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$306,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt B S over N Cobb CR built?

It was built in 1947, making it 78 years old in 2025.

What condition is Rt B S over N Cobb 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 B S over N Cobb CR carry?

About 1,099 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt B S over N Cobb CR?

The structure is 46 ft (14.1 m) long with a longest span of 8 ft (2.4 m) and a deck 23 ft wide.

Who owns Rt B S over N Cobb CR?

It is owned by the State Highway Agency.