US Bridges

Mo 100 E over Gasconade Rvr

Fair

Gasconade County, Missouri · S 12 T 45 N R 6 W · Structure no. 3870

Built
1995
30 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
953 ft
3 main spans
Daily traffic
874
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 100 E over Gasconade Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 100 E over Gasconade Rvr in Gasconade County, Missouri. It was built in 1995, so it is 30 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 6 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 953 ft (290.5 m) long and 35 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 100 E
CrossesGasconade Rvr
LocationS 12 T 45 N R 6 W
RouteState Highway 100
CountyGasconade County
StateMissouri
Coordinates38.66608, -91.55597
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+8 approach)
Design loadHS 20
Structure length953 ft (290.5 m)
Longest span150 ft (45.7 m)
Deck width35 ft (10.8 m)
Roadway width33 ft (10 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 Gasconade Rvr built?

It was built in 1995, making it 30 years old in 2025.

What condition is Mo 100 E over Gasconade 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 June 2024.

How much traffic does Mo 100 E over Gasconade Rvr carry?

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

How long is Mo 100 E over Gasconade Rvr?

The structure is 953 ft (290.5 m) long with a longest span of 150 ft (45.7 m) and a deck 35 ft wide.

Who owns Mo 100 E over Gasconade Rvr?

It is owned by the State Highway Agency.