US Bridges

Keuper RD over S Flat CR

PoorPosted for load

Benton County, Missouri · S 27 T 43 N R 22 W · Structure no. 14916

Built
1910
115 years old, rebuilt 2001
Condition
Poor
inspected January 2024
Type
Arch - Deck
Concrete
Length
24 ft
2 main spans
Daily traffic
15
2023 count
Owner
Local
Other Local Agency

About this bridge

Keuper RD over S Flat CR is a concrete arch - deck carrying Keuper RD over S Flat CR in Benton County, Missouri. It was built in 1910 and reconstructed in 2001, so it is 115 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 4 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 22 by 2043. The structure is 24 ft (7.3 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKeuper RD
CrossesS Flat CR
LocationS 27 T 43 N R 22 W
RouteCounty Highway 79
CountyBenton County
StateMissouri
Coordinates38.46795, -93.34616
Functional classRural Local

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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span20 ft (6.2 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2023)
Projected traffic22 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$174,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Keuper RD over S Flat CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2001.

What condition is Keuper RD over S Flat 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 January 2024.

How much traffic does Keuper RD over S Flat CR carry?

About 15 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Keuper RD over S Flat CR?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.2 m) and a deck 20 ft wide.

Who owns Keuper RD over S Flat CR?

It is owned by the Other Local Agency.