US Bridges

CO RD SW 1871 over Big CR

Fair

Johnson County, Missouri · S 35 T 45 N R 29 W · Structure no. 21600

Built
1980
45 years old, rebuilt 2019
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
111 ft
3 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD SW 1871 over Big CR is a steel stringer/multi-beam or girder carrying CO RD SW 1871 over Big CR in Johnson County, Missouri. It was built in 1980 and reconstructed in 2019, so it is 45 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2043. The structure is 111 ft (33.8 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCO RD SW 1871
CrossesBig CR
LocationS 35 T 45 N R 29 W
RouteCounty Highway 313
CountyJohnson County
StateMissouri
Coordinates38.66119, -94.10561
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length111 ft (33.8 m)
Longest span70 ft (21.3 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic80 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 CO RD SW 1871 over Big CR built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2019.

What condition is CO RD SW 1871 over Big CR 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 CO RD SW 1871 over Big CR carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD SW 1871 over Big CR?

The structure is 111 ft (33.8 m) long with a longest span of 70 ft (21.3 m) and a deck 22 ft wide.

Who owns CO RD SW 1871 over Big CR?

It is owned by the County Highway Agency.