US Bridges

Old Bonne Terre RD over Big Rvr

Good

St. Francois County, Missouri · S 2105 T 37 N R 5 E · Structure no. 14474

Built
1910
115 years old, rebuilt 1983
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
261 ft
3 main spans
Daily traffic
1,200
2023 count
Owner
County
County Highway Agency

About this bridge

Old Bonne Terre RD over Big Rvr is a prestressed concrete box beam or girders - multiple carrying Old Bonne Terre RD over Big Rvr in St. Francois County, Missouri. It was built in 1910 and reconstructed in 1983, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,200 vehicles a day, roughly 10% of them trucks, projected to reach 1,800 by 2043. The structure is 261 ft (79.6 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesOld Bonne Terre RD
CrossesBig Rvr
LocationS 2105 T 37 N R 5 E
RouteCounty Highway 68
Coordinates37.88983, -90.52746
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.5 US tons
Inventory rating34.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length261 ft (79.6 m)
Longest span88 ft (26.8 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2023)
Projected traffic1,800 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Old Bonne Terre RD over Big Rvr built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1983.

What condition is Old Bonne Terre RD over Big Rvr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Old Bonne Terre RD over Big Rvr carry?

About 1,200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Old Bonne Terre RD over Big Rvr?

The structure is 261 ft (79.6 m) long with a longest span of 88 ft (26.8 m) and a deck 27 ft wide.

Who owns Old Bonne Terre RD over Big Rvr?

It is owned by the County Highway Agency.