US Bridges

Lantern ST over Bear CR

Fair

Macon County, Missouri · S 1 T 60 N R 14 W · Structure no. 15937

Built
1992
33 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

Lantern ST over Bear CR is a prestressed concrete continuous tee beam carrying Lantern ST over Bear CR in Macon County, Missouri. It was built in 1992, so it is 33 years old, younger 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 22 by 2044. The structure is 120 ft (36.6 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLantern ST
CrossesBear CR
LocationS 1 T 60 N R 14 W
RouteCounty Highway 104
CountyMacon County
StateMissouri
Coordinates40.03704, -92.40409
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic22 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Lantern ST over Bear CR built?

It was built in 1992, making it 33 years old in 2025.

What condition is Lantern ST over Bear 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 December 2023.

How much traffic does Lantern ST over Bear CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Lantern ST over Bear CR?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns Lantern ST over Bear CR?

It is owned by the County Highway Agency.