US Bridges

Mo 100 E over ST Johns CR

Fair

Franklin County, Missouri · S 20 T 44 N R 1 W · Structure no. 5598

Built
1969
56 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
221 ft
3 main spans
Daily traffic
11,455
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 100 E over ST Johns CR is a steel continuous stringer/multi-beam or girder carrying Mo 100 E over ST Johns CR in Franklin County, Missouri. It was built in 1969, so it is 56 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 11,455 vehicles a day, roughly 6% of them trucks, projected to reach 21,765 by 2044. The structure is 221 ft (67.4 m) long and 47 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesMo 100 E
CrossesST Johns CR
LocationS 20 T 44 N R 1 W
RouteState Highway 100
CountyFranklin County
StateMissouri
Coordinates38.55815, -91.04884
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length221 ft (67.4 m)
Longest span85 ft (25.9 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,455 (2024)
Projected traffic21,765 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 ST Johns CR built?

It was built in 1969, making it 56 years old in 2025.

What condition is Mo 100 E over ST Johns 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 October 2023.

How much traffic does Mo 100 E over ST Johns CR carry?

About 11,455 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Mo 100 E over ST Johns CR?

The structure is 221 ft (67.4 m) long with a longest span of 85 ft (25.9 m) and a deck 47 ft wide.

Who owns Mo 100 E over ST Johns CR?

It is owned by the State Highway Agency.