US Bridges

Rp IS270W to IS170 over Is 270 Is 170 or 270

Fair

St. Louis County, Missouri · S 939 T 47 N R 6 E · Structure no. 29167

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,075 ft
5 main spans
Daily traffic
21,448
2024 count
Owner
State
State Highway Agency

About this bridge

Rp IS270W to IS170 over Is 270 Is 170 or 270 is a steel continuous stringer/multi-beam or girder carrying Rp IS270W to IS170 over Is 270 Is 170 or 270 in St. Louis County, Missouri. It was built in 2002, so it is 23 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 21,448 vehicles a day, roughly 10% of them trucks, projected to reach 26,810 by 2044. The structure is 1,075 ft (327.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRp IS270W to IS170
CrossesIs 270 Is 170 or 270
LocationS 939 T 47 N R 6 E
RouteState Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.77519, -90.34041
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+5 approach)
Design loadHS 20
Structure length1,075 ft (327.7 m)
Longest span153 ft (46.6 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,448 (2024)
Projected traffic26,810 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 IS270W to IS170 over Is 270 Is 170 or 270 built?

It was built in 2002, making it 23 years old in 2025.

What condition is Rp IS270W to IS170 over Is 270 Is 170 or 270 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 August 2023.

How much traffic does Rp IS270W to IS170 over Is 270 Is 170 or 270 carry?

About 21,448 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rp IS270W to IS170 over Is 270 Is 170 or 270?

The structure is 1,075 ft (327.7 m) long with a longest span of 153 ft (46.6 m) and a deck 43 ft wide.

Who owns Rp IS270W to IS170 over Is 270 Is 170 or 270?

It is owned by the State Highway Agency.