US Bridges

Mo 8 E over Allen CR

Fair

Washington County, Missouri · S 22 T 37 N R 1 E · Structure no. 1192

Built
1965
60 years old, rebuilt 1986
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
134 ft
3 main spans
Daily traffic
3,815
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 8 E over Allen CR is a steel continuous stringer/multi-beam or girder carrying Mo 8 E over Allen CR in Washington County, Missouri. It was built in 1965 and reconstructed in 1986, so it is 60 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 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 3,815 vehicles a day, roughly 15% of them trucks, projected to reach 7,249 by 2044. The structure is 134 ft (40.8 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 8 E
CrossesAllen CR
LocationS 22 T 37 N R 1 E
RouteState Highway 8
CountyWashington County
StateMissouri
Coordinates37.91252, -90.91932
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length134 ft (40.8 m)
Longest span50 ft (15.2 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,815 (2024)
Projected traffic7,249 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemYes

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 8 E over Allen CR built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1986.

What condition is Mo 8 E over Allen 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 June 2024.

How much traffic does Mo 8 E over Allen CR carry?

About 3,815 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Mo 8 E over Allen CR?

The structure is 134 ft (40.8 m) long with a longest span of 50 ft (15.2 m) and a deck 34 ft wide.

Who owns Mo 8 E over Allen CR?

It is owned by the State Highway Agency.