US Bridges

CO RD NE 501 over Blackjack CR

Fair

Johnson County, Missouri · S 14 T 47 N R 25 W · Structure no. 17455

Built
1910
115 years old, rebuilt 1994
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
98 ft
3 main spans
Daily traffic
55
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NE 501 over Blackjack CR is a steel stringer/multi-beam or girder carrying CO RD NE 501 over Blackjack CR in Johnson County, Missouri. It was built in 1910 and reconstructed in 1994, 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 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 55 vehicles a day, roughly 10% of them trucks, projected to reach 83 by 2043. The structure is 98 ft (29.9 m) long and 23 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCO RD NE 501
CrossesBlackjack CR
LocationS 14 T 47 N R 25 W
RouteCounty Highway 153
CountyJohnson County
StateMissouri
Coordinates38.86592, -93.6446
Functional classUrban 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 alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating62.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length98 ft (29.9 m)
Longest span30 ft (9.1 m)
Deck width23 ft (7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2023)
Projected traffic83 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 NE 501 over Blackjack CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1994.

What condition is CO RD NE 501 over Blackjack 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 November 2024.

How much traffic does CO RD NE 501 over Blackjack CR carry?

About 55 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NE 501 over Blackjack CR?

The structure is 98 ft (29.9 m) long with a longest span of 30 ft (9.1 m) and a deck 23 ft wide.

Who owns CO RD NE 501 over Blackjack CR?

It is owned by the County Highway Agency.