US Bridges

SE 4006 over Miami Ditch

PoorPosted for load

Bates County, Missouri · S 16 T 39 N R 31 W · Structure no. 24460

Built
1989
36 years old
Condition
Poor
inspected December 2024
Type
Girder and Floorbeam System
Steel
Length
69 ft
1 main span
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

SE 4006 over Miami Ditch is a steel girder and floorbeam system carrying SE 4006 over Miami Ditch in Bates County, Missouri. It was built in 1989, so it is 36 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 75 vehicles a day, roughly 10% of them trucks, projected to reach 98 by 2043. The structure is 69 ft (21 m) long and 16 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSE 4006
CrossesMiami Ditch
LocationS 16 T 39 N R 31 W
RouteCounty Highway 496
Coordinates38.16283, -94.34734
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating37.7 US tons
Inventory rating15.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length69 ft (21 m)
Longest span67 ft (20.4 m)
Deck width16 ft (4.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic98 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$527,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SE 4006 over Miami Ditch built?

It was built in 1989, making it 36 years old in 2025.

What condition is SE 4006 over Miami Ditch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does SE 4006 over Miami Ditch carry?

About 75 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SE 4006 over Miami Ditch?

The structure is 69 ft (21 m) long with a longest span of 67 ft (20.4 m) and a deck 16 ft wide.

Who owns SE 4006 over Miami Ditch?

It is owned by the County Highway Agency.