US Bridges

Rt a E over Frederick CR

Fair

Oregon County, Missouri · S 34 T 23 N R 4 W · Structure no. 9946

Built
1935
90 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
86 ft
8 main spans
Daily traffic
326
2024 count
Owner
State
State Highway Agency

About this bridge

Rt a E over Frederick CR is a concrete slab carrying Rt a E over Frederick CR in Oregon County, Missouri. It was built in 1935, so it is 90 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 326 vehicles a day, roughly 8% of them trucks, projected to reach 456 by 2044. The structure is 86 ft (26.2 m) long and 22 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesRt a E
CrossesFrederick CR
LocationS 34 T 23 N R 4 W
RouteState Highway 0A
CountyOregon County
StateMissouri
Coordinates36.60357, -91.39791
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.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadOther
Structure length86 ft (26.2 m)
Longest span11 ft (3.3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic326 (2024)
Projected traffic456 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$897,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt a E over Frederick CR built?

It was built in 1935, making it 90 years old in 2025.

What condition is Rt a E over Frederick 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 January 2024.

How much traffic does Rt a E over Frederick CR carry?

About 326 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Rt a E over Frederick CR?

The structure is 86 ft (26.2 m) long with a longest span of 11 ft (3.3 m) and a deck 22 ft wide.

Who owns Rt a E over Frederick CR?

It is owned by the State Highway Agency.