US Bridges

Rp IS70W to IS170E over Is 70 Rp IS170E to IS70

Fair

St. Louis County, Missouri · S 656 T 46 N R 6 E · Structure no. 2576

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
684 ft
7 main spans
Daily traffic
15,599
2024 count
Owner
State
State Highway Agency

About this bridge

Rp IS70W to IS170E over Is 70 Rp IS170E to IS70 is a steel continuous stringer/multi-beam or girder carrying Rp IS70W to IS170E over Is 70 Rp IS170E 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 15,599 vehicles a day, roughly 10% of them trucks, projected to reach 19,499 by 2044. The structure is 684 ft (208.5 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp IS70W to IS170E
CrossesIs 70 Rp IS170E to IS70
LocationS 656 T 46 N R 6 E
RouteState Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.72799, -90.33107
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 alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length684 ft (208.5 m)
Longest span139 ft (42.4 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,599 (2024)
Projected traffic19,499 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 IS70W to IS170E over Is 70 Rp IS170E to IS70 built?

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

What condition is Rp IS70W to IS170E over Is 70 Rp IS170E 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 IS70W to IS170E over Is 70 Rp IS170E to IS70 carry?

About 15,599 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rp IS70W to IS170E over Is 70 Rp IS170E to IS70?

The structure is 684 ft (208.5 m) long with a longest span of 139 ft (42.4 m) and a deck 35 ft wide.

Who owns Rp IS70W to IS170E over Is 70 Rp IS170E to IS70?

It is owned by the State Highway Agency.