US Bridges

CO RD NE 600 over Clear Fk Blackwat

Fair

Johnson County, Missouri · S 25 T 47 N R 25 W · Structure no. 17363

Built
1982
43 years old
Condition
Fair
inspected November 2024
Type
Slab
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
45
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NE 600 over Clear Fk Blackwat is a prestressed concrete slab carrying CO RD NE 600 over Clear Fk Blackwat in Johnson County, Missouri. It was built in 1982, so it is 43 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 45 vehicles a day, roughly 10% of them trucks, projected to reach 72 by 2043. The structure is 72 ft (21.9 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesCO RD NE 600
CrossesClear Fk Blackwat
LocationS 25 T 47 N R 25 W
RouteCounty Highway 150
Coordinates38.84424, -93.62224
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating39.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length72 ft (21.9 m)
Longest span67 ft (20.4 m)
Deck width22 ft (6.8 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2023)
Projected traffic72 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$370,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD NE 600 over Clear Fk Blackwat built?

It was built in 1982, making it 43 years old in 2025.

What condition is CO RD NE 600 over Clear Fk Blackwat 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 November 2024.

How much traffic does CO RD NE 600 over Clear Fk Blackwat carry?

About 45 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NE 600 over Clear Fk Blackwat?

The structure is 72 ft (21.9 m) long with a longest span of 67 ft (20.4 m) and a deck 22 ft wide.

Who owns CO RD NE 600 over Clear Fk Blackwat?

It is owned by the County Highway Agency.