US Bridges

Rt K S over Blackwater Rvr

Fair

Cooper County, Missouri · S 27 T 49 N R 19 W · Structure no. 1147

Built
1965
60 years old, rebuilt 2020
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
425 ft
3 main spans
Daily traffic
479
2024 count
Owner
State
State Highway Agency

About this bridge

Rt K S over Blackwater Rvr is a steel continuous stringer/multi-beam or girder carrying Rt K S over Blackwater Rvr in Cooper County, Missouri. It was built in 1965 and reconstructed in 2020, so it is 60 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 479 vehicles a day, roughly 11% of them trucks, projected to reach 647 by 2044. The structure is 425 ft (129.5 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesRt K S
CrossesBlackwater Rvr
LocationS 27 T 49 N R 19 W
RouteState Highway 0K
CountyCooper County
StateMissouri
Coordinates38.98382, -92.98651
Functional classRural Major 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
Deck9 ExcellentNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length425 ft (129.5 m)
Longest span120 ft (36.6 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic479 (2024)
Projected traffic647 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Rt K S over Blackwater Rvr built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2020.

What condition is Rt K S over Blackwater 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 July 2023.

How much traffic does Rt K S over Blackwater Rvr carry?

About 479 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt K S over Blackwater Rvr?

The structure is 425 ft (129.5 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.

Who owns Rt K S over Blackwater Rvr?

It is owned by the State Highway Agency.