US Bridges

Cedar Falls RD over Flat Rvr

Fair

St. Francois County, Missouri · S 345 T 37 N R 5 E · Structure no. 14170

Built
1989
36 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
300 ft
6 main spans
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

Cedar Falls RD over Flat Rvr is a prestressed concrete continuous tee beam carrying Cedar Falls RD over Flat Rvr in St. Francois County, Missouri. It was built in 1989, so it is 36 years old, younger 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 300 vehicles a day, roughly 10% of them trucks, projected to reach 450 by 2043. The structure is 300 ft (91.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCedar Falls RD
CrossesFlat Rvr
LocationS 345 T 37 N R 5 E
RouteCounty Highway 59
CountySt. Francois County
StateMissouri
Coordinates37.88326, -90.50333
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic450 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cedar Falls RD over Flat Rvr built?

It was built in 1989, making it 36 years old in 2025.

What condition is Cedar Falls RD over Flat Rvr 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 December 2024.

How much traffic does Cedar Falls RD over Flat Rvr carry?

About 300 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Cedar Falls RD over Flat Rvr?

The structure is 300 ft (91.4 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns Cedar Falls RD over Flat Rvr?

It is owned by the County Highway Agency.