US Bridges

Hudson DR over Black Jack CR

FairPosted for load

St. Louis County, Missouri · S 5 T 46 N R 7 E · Structure no. 15528

Built
1955
70 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
3,655
2024 count
Owner
County
County Highway Agency

About this bridge

Hudson DR over Black Jack CR is a steel stringer/multi-beam or girder carrying Hudson DR over Black Jack CR in St. Louis County, Missouri. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 3,655 vehicles a day, roughly 2% of them trucks, projected to reach 4,934 by 2044. The structure is 68 ft (20.7 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHudson DR
CrossesBlack Jack CR
LocationS 5 T 46 N R 7 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.75958, -90.25584
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span64 ft (19.5 m)
Deck width35 ft (10.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,655 (2024)
Projected traffic4,934 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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$600,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hudson DR over Black Jack CR built?

It was built in 1955, making it 70 years old in 2025.

What condition is Hudson DR over Black Jack 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 February 2024.

How much traffic does Hudson DR over Black Jack CR carry?

About 3,655 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Hudson DR over Black Jack CR?

The structure is 68 ft (20.7 m) long with a longest span of 64 ft (19.5 m) and a deck 35 ft wide.

Who owns Hudson DR over Black Jack CR?

It is owned by the County Highway Agency.