US Bridges

CO RD NW 501 over S Fk Blackwater Rv

Fair

Johnson County, Missouri · S 7 T 46 N R 26 W · Structure no. 20067

Built
1980
45 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NW 501 over S Fk Blackwater Rv is a steel continuous stringer/multi-beam or girder carrying CO RD NW 501 over S Fk Blackwater Rv in Johnson County, Missouri. It was built in 1980, 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 110 vehicles a day, roughly 10% of them trucks, projected to reach 176 by 2043. The structure is 203 ft (61.9 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCO RD NW 501
CrossesS Fk Blackwater Rv
LocationS 7 T 46 N R 26 W
RouteCounty Highway 245
CountyJohnson County
StateMissouri
Coordinates38.80792, -93.83724
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 evaluation6: Equal to present minimum criteria
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 alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length203 ft (61.9 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic176 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 NW 501 over S Fk Blackwater Rv built?

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

What condition is CO RD NW 501 over S Fk Blackwater Rv 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 NW 501 over S Fk Blackwater Rv carry?

About 110 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NW 501 over S Fk Blackwater Rv?

The structure is 203 ft (61.9 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns CO RD NW 501 over S Fk Blackwater Rv?

It is owned by the County Highway Agency.