US Bridges

Old RTE 8 over Trib of Big Rvr

Fair

St. Francois County, Missouri · S 3 T 36 N R 5 E · Structure no. 19959

Built
1900
125 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
42 ft
3 main spans
Daily traffic
200
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old RTE 8 over Trib of Big Rvr is a concrete continuous culvert carrying Old RTE 8 over Trib of Big Rvr in St. Francois County, Missouri. It was built in 1900, so it is 125 years old, older 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 300 by 2043. The structure is 42 ft (12.8 m) long and 28 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesOld RTE 8
CrossesTrib of Big Rvr
LocationS 3 T 36 N R 5 E
RouteCity Street 0
CountySt. Francois County
StateMissouri
Coordinates37.86412, -90.58446
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadOther
Structure length42 ft (12.8 m)
Longest span13 ft (4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic300 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Old RTE 8 over Trib of Big Rvr built?

It was built in 1900, making it 125 years old in 2025.

What condition is Old RTE 8 over Trib of Big 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 Old RTE 8 over Trib of Big Rvr carry?

About 200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Old RTE 8 over Trib of Big Rvr?

The structure is 42 ft (12.8 m) long with a longest span of 13 ft (4 m) and a deck 28 ft wide.

Who owns Old RTE 8 over Trib of Big Rvr?

It is owned by the City or Municipal Highway Agency.