US Bridges

Rt Aa S over Coon CR

Fair

Lawrence County, Missouri · S 1 T 29 N R 29 W · Structure no. 9901

Built
1950
75 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
116
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Coon CR is a concrete continuous culvert carrying Rt Aa S over Coon CR in Lawrence County, Missouri. It was built in 1950, so it is 75 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 116 vehicles a day, roughly 10% of them trucks, projected to reach 168 by 2044. The structure is 25 ft (7.6 m) long and 22 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesRt Aa S
CrossesCoon CR
LocationS 1 T 29 N R 29 W
RouteState Highway 0AA
CountyLawrence County
StateMissouri
Coordinates37.26981, -94.03493
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.6 US tons
Inventory rating27.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic116 (2024)
Projected traffic168 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Rt Aa S over Coon CR built?

It was built in 1950, making it 75 years old in 2025.

What condition is Rt Aa S over Coon 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 April 2023.

How much traffic does Rt Aa S over Coon CR carry?

About 116 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt Aa S over Coon CR?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m) and a deck 22 ft wide.

Who owns Rt Aa S over Coon CR?

It is owned by the State Highway Agency.