US Bridges

190th ST over Br of S Blackbird

Fair

Putnam County, Missouri · S 1 T 65 N R 19 W · Structure no. 23043

Built
1910
115 years old, rebuilt 1989
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
47 ft
2 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

190th ST over Br of S Blackbird is a steel stringer/multi-beam or girder carrying 190th ST over Br of S Blackbird in Putnam County, Missouri. It was built in 1910 and reconstructed in 1989, 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 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 47 ft (14.3 m) long and 13 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries190th ST
CrossesBr of S Blackbird
LocationS 1 T 65 N R 19 W
RouteCounty Highway 387
CountyPutnam County
StateMissouri
Coordinates40.46155, -92.98503
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadOther
Structure length47 ft (14.3 m)
Longest span39 ft (11.9 m)
Deck width13 ft (4 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 190th ST over Br of S Blackbird built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1989.

What condition is 190th ST over Br of S Blackbird 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 190th ST over Br of S Blackbird carry?

About 40 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 190th ST over Br of S Blackbird?

The structure is 47 ft (14.3 m) long with a longest span of 39 ft (11.9 m) and a deck 13 ft wide.

Who owns 190th ST over Br of S Blackbird?

It is owned by the County Highway Agency.