US Bridges

Union Blvd S over Is 70 Rv 70

Fair

St. Louis city, Missouri · S 29 T 46 N R 7 E · Structure no. 11834

Built
1999
26 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
323 ft
4 main spans
Daily traffic
17,397
2024 count
Owner
State
State Highway Agency

About this bridge

Union Blvd S over Is 70 Rv 70 is a steel continuous stringer/multi-beam or girder carrying Union Blvd S over Is 70 Rv 70 in St. Louis city, Missouri. It was built in 1999, so it is 26 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 17,397 vehicles a day, roughly 5% of them trucks, projected to reach 24,356 by 2044. The structure is 323 ft (98.5 m) long and 77 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUnion Blvd S
CrossesIs 70 Rv 70
LocationS 29 T 46 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.68851, -90.25097
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating77.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length323 ft (98.5 m)
Longest span95 ft (29 m)
Deck width77 ft (23.4 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,397 (2024)
Projected traffic24,356 by 2044
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Union Blvd S over Is 70 Rv 70 built?

It was built in 1999, making it 26 years old in 2025.

What condition is Union Blvd S over Is 70 Rv 70 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 Union Blvd S over Is 70 Rv 70 carry?

About 17,397 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Union Blvd S over Is 70 Rv 70?

The structure is 323 ft (98.5 m) long with a longest span of 95 ft (29 m) and a deck 77 ft wide.

Who owns Union Blvd S over Is 70 Rv 70?

It is owned by the State Highway Agency.