US Bridges

Rt Aa S over Flat CR

Good

Saline County, Missouri · S 9 T 49 N R 19 W · Structure no. 35230

Built
2016
9 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
115 ft
3 main spans
Daily traffic
112
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Flat CR is a prestressed concrete box beam or girders - single or spread carrying Rt Aa S over Flat CR in Saline County, Missouri. It was built in 2016, so it is 9 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 112 vehicles a day, roughly 11% of them trucks, projected to reach 140 by 2044. The structure is 115 ft (35.2 m) long and 27 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesRt Aa S
CrossesFlat CR
LocationS 9 T 49 N R 19 W
RouteState Highway 0AA
CountySaline County
StateMissouri
Coordinates39.03951, -93.00986
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length115 ft (35.2 m)
Longest span40 ft (12.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112 (2024)
Projected traffic140 by 2044
Trucks11%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Aa S over Flat CR built?

It was built in 2016, making it 9 years old in 2025.

What condition is Rt Aa S over Flat CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

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

About 112 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt Aa S over Flat CR?

The structure is 115 ft (35.2 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns Rt Aa S over Flat CR?

It is owned by the State Highway Agency.