US Bridges

Rt U S over Flat CR

Poor

Pettis County, Missouri · S 22 T 45 N R 21 W · Structure no. 1806

Built
1963
62 years old, rebuilt 2014
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
478 ft
3 main spans
Daily traffic
2,186
2024 count
Owner
State
State Highway Agency

About this bridge

Rt U S over Flat CR is a steel continuous stringer/multi-beam or girder carrying Rt U S over Flat CR in Pettis County, Missouri. It was built in 1963 and reconstructed in 2014, so it is 62 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.

It carries about 2,186 vehicles a day, roughly 6% of them trucks, projected to reach 3,498 by 2044. The structure is 478 ft (145.7 m) long and 33 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesRt U S
CrossesFlat CR
LocationS 22 T 45 N R 21 W
RouteState Highway 0U
Coordinates38.66446, -93.21946
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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating18.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+3 approach)
Design loadH 15
Structure length478 ft (145.7 m)
Longest span120 ft (36.6 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,186 (2024)
Projected traffic3,498 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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$4.8 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt U S over Flat CR built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2014.

What condition is Rt U S over 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 August 2024.

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

About 2,186 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Rt U S over Flat CR?

The structure is 478 ft (145.7 m) long with a longest span of 120 ft (36.6 m) and a deck 33 ft wide.

Who owns Rt U S over Flat CR?

It is owned by the State Highway Agency.