US Bridges

Atherton-Sibley over Lit Blue Rvr

Fair

Jackson County, Missouri · S 36 T 51 N R 31 W · Structure no. 13839

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
434 ft
5 main spans
Daily traffic
135
2024 count
Owner
County
County Highway Agency

About this bridge

Atherton-Sibley over Lit Blue Rvr is a prestressed concrete stringer/multi-beam or girder carrying Atherton-Sibley over Lit Blue Rvr in Jackson County, Missouri. It was built in 1977, so it is 48 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 135 vehicles a day, roughly 5% of them trucks, projected to reach 203 by 2044. The structure is 434 ft (132.3 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesAtherton-Sibley
CrossesLit Blue Rvr
LocationS 36 T 51 N R 31 W
RouteCounty Highway 49
CountyJackson County
StateMissouri
Coordinates39.19794, -94.26724
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length434 ft (132.3 m)
Longest span87 ft (26.5 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135 (2024)
Projected traffic203 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Atherton-Sibley over Lit Blue Rvr built?

It was built in 1977, making it 48 years old in 2025.

What condition is Atherton-Sibley over Lit Blue Rvr 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 March 2023.

How much traffic does Atherton-Sibley over Lit Blue Rvr carry?

About 135 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Atherton-Sibley over Lit Blue Rvr?

The structure is 434 ft (132.3 m) long with a longest span of 87 ft (26.5 m) and a deck 30 ft wide.

Who owns Atherton-Sibley over Lit Blue Rvr?

It is owned by the County Highway Agency.