US Bridges

Rt Aa E over Big Turkey CR

PoorPosted for load

Benton County, Missouri · S 5 T 38 N R 21 W · Structure no. 6920

Built
1957
68 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
133 ft
3 main spans
Daily traffic
191
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa E over Big Turkey CR is a steel stringer/multi-beam or girder carrying Rt Aa E over Big Turkey CR in Benton County, Missouri. It was built in 1957, so it is 68 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 191 vehicles a day, roughly 10% of them trucks, projected to reach 306 by 2044. The structure is 133 ft (40.5 m) long and 22 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesRt Aa E
CrossesBig Turkey CR
LocationS 5 T 38 N R 21 W
RouteState Highway 0AA
CountyBenton County
StateMissouri
Coordinates38.08013, -93.25677
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating17.9 US tons
Inventory rating7.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length133 ft (40.5 m)
Longest span61 ft (18.5 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic191 (2024)
Projected traffic306 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Aa E over Big Turkey CR built?

It was built in 1957, making it 68 years old in 2025.

What condition is Rt Aa E over Big Turkey CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Rt Aa E over Big Turkey CR carry?

About 191 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt Aa E over Big Turkey CR?

The structure is 133 ft (40.5 m) long with a longest span of 61 ft (18.5 m) and a deck 22 ft wide.

Who owns Rt Aa E over Big Turkey CR?

It is owned by the State Highway Agency.