US Bridges

US 67 N over Flat Rvr

Poor

St. Francois County, Missouri · S 32 T 37 N R 5 E · Structure no. 6415

Built
1957
68 years old, rebuilt 1990
Condition
Poor
inspected October 2024
Type
Tee Beam
Concrete
Length
214 ft
5 main spans
Daily traffic
17,758
2024 count
Owner
State
State Highway Agency

About this bridge

US 67 N over Flat Rvr is a concrete tee beam carrying US 67 N over Flat Rvr in St. Francois County, Missouri. It was built in 1957 and reconstructed in 1990, so it is 68 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 17,758 vehicles a day, roughly 9% of them trucks, projected to reach 31,077 by 2044. The structure is 214 ft (65.2 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 67 N
CrossesFlat Rvr
LocationS 32 T 37 N R 5 E
RouteU.S. Route 67
CountySt. Francois County
StateMissouri
Coordinates37.87002, -90.50044
Functional classUrban Principal Arterial - Other Freeway or Expressway

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 rating31.7 US tons
Inventory rating18.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length214 ft (65.2 m)
Longest span43 ft (13 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,758 (2024)
Projected traffic31,077 by 2044
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$2.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 67 N over Flat Rvr built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1990.

What condition is US 67 N over Flat Rvr 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 October 2024.

How much traffic does US 67 N over Flat Rvr carry?

About 17,758 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is US 67 N over Flat Rvr?

The structure is 214 ft (65.2 m) long with a longest span of 43 ft (13 m) and a deck 32 ft wide.

Who owns US 67 N over Flat Rvr?

It is owned by the State Highway Agency.