US Bridges

Mo 100 E over Libbie CR

Fair

Gasconade County, Missouri · S 18 T 45 N R 5 W · Structure no. 1932

Built
1968
57 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
114 ft
3 main spans
Daily traffic
874
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 100 E over Libbie CR is a steel continuous stringer/multi-beam or girder carrying Mo 100 E over Libbie CR in Gasconade County, Missouri. It was built in 1968, so it is 57 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 874 vehicles a day, roughly 10% of them trucks, projected to reach 1,136 by 2044. The structure is 114 ft (34.7 m) long and 31 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 100 E
CrossesLibbie CR
LocationS 18 T 45 N R 5 W
RouteState Highway 100
CountyGasconade County
StateMissouri
Coordinates38.64467, -91.52927
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length114 ft (34.7 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic874 (2024)
Projected traffic1,136 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 Mo 100 E over Libbie CR built?

It was built in 1968, making it 57 years old in 2025.

What condition is Mo 100 E over Libbie 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 September 2024.

How much traffic does Mo 100 E over Libbie CR carry?

About 874 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 100 E over Libbie CR?

The structure is 114 ft (34.7 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns Mo 100 E over Libbie CR?

It is owned by the State Highway Agency.