US Bridges

Is 170 E over Rp Boeing RD to IS170E

Fair

St. Louis County, Missouri · S 2979 T 46 N R 6 E · Structure no. 2512

Built
1980
45 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,215 ft
15 main spans
Daily traffic
46,871
2024 count
Owner
State
State Highway Agency

About this bridge

Is 170 E over Rp Boeing RD to IS170E is a steel continuous stringer/multi-beam or girder carrying Is 170 E over Rp Boeing RD to IS170E in St. Louis County, Missouri. It was built in 1980, so it is 45 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 5 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 46,871 vehicles a day, roughly 12% of them trucks, projected to reach 58,589 by 2044. The structure is 1,215 ft (370.3 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 170 E
CrossesRp Boeing RD to IS170E
LocationS 2979 T 46 N R 6 E
RouteInterstate 170
CountySt. Louis County
StateMissouri
Coordinates38.75688, -90.33963
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20 + Mod
Structure length1,215 ft (370.3 m)
Longest span97 ft (29.6 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,871 (2024)
Projected traffic58,589 by 2044
Trucks12%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 170 E over Rp Boeing RD to IS170E built?

It was built in 1980, making it 45 years old in 2025.

What condition is Is 170 E over Rp Boeing RD to IS170E 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 2024.

How much traffic does Is 170 E over Rp Boeing RD to IS170E carry?

About 46,871 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Is 170 E over Rp Boeing RD to IS170E?

The structure is 1,215 ft (370.3 m) long with a longest span of 97 ft (29.6 m) and a deck 59 ft wide.

Who owns Is 170 E over Rp Boeing RD to IS170E?

It is owned by the State Highway Agency.