US Bridges

Twin Rivers RD over Big Rvr

Fair

Jefferson County, Missouri · S 18 T 43 N R 4 E · Structure no. 12521

Built
1908
117 years old, rebuilt 1983
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
295 ft
2 main spans
Daily traffic
1,500
2023 count
Owner
County
County Highway Agency

About this bridge

Twin Rivers RD over Big Rvr is a steel continuous stringer/multi-beam or girder carrying Twin Rivers RD over Big Rvr in Jefferson County, Missouri. It was built in 1908 and reconstructed in 1983, so it is 117 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 5 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 1,500 vehicles a day, roughly 2% of them trucks, projected to reach 3,000 by 2043. The structure is 295 ft (89.9 m) long and 28 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesTwin Rivers RD
CrossesBig Rvr
LocationS 18 T 43 N R 4 E
RouteCounty Highway 130
CountyJefferson County
StateMissouri
Coordinates38.46809, -90.62389
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadH 15
Structure length295 ft (89.9 m)
Longest span125 ft (38.1 m)
Deck width28 ft (8.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic3,000 by 2043
Trucks2%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Twin Rivers RD over Big Rvr built?

It was built in 1908, making it 117 years old in 2025. It was reconstructed in 1983.

What condition is Twin Rivers RD over 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 February 2025.

How much traffic does Twin Rivers RD over Big Rvr carry?

About 1,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Twin Rivers RD over Big Rvr?

The structure is 295 ft (89.9 m) long with a longest span of 125 ft (38.1 m) and a deck 28 ft wide.

Who owns Twin Rivers RD over Big Rvr?

It is owned by the County Highway Agency.