US Bridges

Rp IS70E to IS170W over Is 70 Rp IS170W to IS70

Fair

St. Louis County, Missouri · S 656 T 46 N R 6 E · Structure no. 2572

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
399 ft
4 main spans
Daily traffic
8,055
2024 count
Owner
State
State Highway Agency

About this bridge

Rp IS70E to IS170W over Is 70 Rp IS170W to IS70 is a steel continuous stringer/multi-beam or girder carrying Rp IS70E to IS170W over Is 70 Rp IS170W to IS70 in St. Louis County, Missouri. It was built in 1981, so it is 44 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 8,055 vehicles a day, roughly 10% of them trucks, projected to reach 10,069 by 2044. The structure is 399 ft (121.6 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp IS70E to IS170W
CrossesIs 70 Rp IS170W to IS70
LocationS 656 T 46 N R 6 E
RouteState Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.7303, -90.33254
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length399 ft (121.6 m)
Longest span116 ft (35.4 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,055 (2024)
Projected traffic10,069 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 Rp IS70E to IS170W over Is 70 Rp IS170W to IS70 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Rp IS70E to IS170W over Is 70 Rp IS170W to IS70 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 September 2024.

How much traffic does Rp IS70E to IS170W over Is 70 Rp IS170W to IS70 carry?

About 8,055 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rp IS70E to IS170W over Is 70 Rp IS170W to IS70?

The structure is 399 ft (121.6 m) long with a longest span of 116 ft (35.4 m) and a deck 34 ft wide.

Who owns Rp IS70E to IS170W over Is 70 Rp IS170W to IS70?

It is owned by the State Highway Agency.