US Bridges

Rt Aa S over Cottonwood Br

Fair

Lincoln County, Missouri · S 24 T 49 N R 2 W · Structure no. 8118

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
375
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Cottonwood Br is a concrete continuous culvert carrying Rt Aa S over Cottonwood Br in Lincoln County, Missouri. It was built in 1962, so it is 63 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 375 vehicles a day, roughly 11% of them trucks, projected to reach 750 by 2044. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesRt Aa S
CrossesCottonwood Br
LocationS 24 T 49 N R 2 W
RouteState Highway 0AA
CountyLincoln County
StateMissouri
Coordinates39.00102, -91.07376
Functional classRural Minor 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.4 US tons
Inventory rating41.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length23 ft (7.1 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2024)
Projected traffic750 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Cottonwood Br built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rt Aa S over Cottonwood Br 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 September 2024.

How much traffic does Rt Aa S over Cottonwood Br carry?

About 375 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt Aa S over Cottonwood Br?

The structure is 23 ft (7.1 m) long with a longest span of 11 ft (3.4 m).

Who owns Rt Aa S over Cottonwood Br?

It is owned by the State Highway Agency.