US Bridges

Rt B S over Main Dtch

Good

Dunklin County, Missouri · S 21 T 21 N R 9 E · Structure no. 3148

Built
1983
42 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
110 ft
3 main spans
Daily traffic
142
2024 count
Owner
State
State Highway Agency

About this bridge

Rt B S over Main Dtch is a prestressed concrete tee beam carrying Rt B S over Main Dtch in Dunklin County, Missouri. It was built in 1983, so it is 42 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 142 vehicles a day, roughly 25% of them trucks, projected to reach 199 by 2044. The structure is 110 ft (33.5 m) long and 37 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesRt B S
CrossesMain Dtch
LocationS 21 T 21 N R 9 E
RouteState Highway 0B
Coordinates36.44395, -90.08553
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length110 ft (33.5 m)
Longest span37 ft (11.3 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic142 (2024)
Projected traffic199 by 2044
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 B S over Main Dtch built?

It was built in 1983, making it 42 years old in 2025.

What condition is Rt B S over Main Dtch 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 November 2024.

How much traffic does Rt B S over Main Dtch carry?

About 142 vehicles per day (2024 count), of which roughly 25% are trucks.

How long is Rt B S over Main Dtch?

The structure is 110 ft (33.5 m) long with a longest span of 37 ft (11.3 m) and a deck 37 ft wide.

Who owns Rt B S over Main Dtch?

It is owned by the State Highway Agency.