US Bridges

Rp IS170E to IS70E over Is 170

Fair

St. Louis County, Missouri · S 656 T 46 N R 6 E · Structure no. 2575

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
272 ft
3 main spans
Daily traffic
14,018
2024 count
Owner
State
State Highway Agency

About this bridge

Rp IS170E to IS70E over Is 170 is a prestressed concrete continuous box beam or girders - single or spread carrying Rp IS170E to IS70E over Is 170 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 14,018 vehicles a day, roughly 18% of them trucks, projected to reach 17,523 by 2044. The structure is 272 ft (82.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp IS170E to IS70E
CrossesIs 170
LocationS 656 T 46 N R 6 E
RouteState Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.7287, -90.33105
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length272 ft (82.9 m)
Longest span146 ft (44.5 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,018 (2024)
Projected traffic17,523 by 2044
Trucks18%
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 IS170E to IS70E over Is 170 built?

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

What condition is Rp IS170E to IS70E over Is 170 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 IS170E to IS70E over Is 170 carry?

About 14,018 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Rp IS170E to IS70E over Is 170?

The structure is 272 ft (82.9 m) long with a longest span of 146 ft (44.5 m) and a deck 28 ft wide.

Who owns Rp IS170E to IS70E over Is 170?

It is owned by the State Highway Agency.