US Bridges

Is 470 W over Is 70

Fair

Jackson County, Missouri · S 20 T 49 N R 31 W · Structure no. 1119

Built
1964
61 years old, rebuilt 1985
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
232 ft
4 main spans
Daily traffic
45,169
2024 count
Owner
State
State Highway Agency

About this bridge

Is 470 W over Is 70 is a concrete continuous slab carrying Is 470 W over Is 70 in Jackson County, Missouri. It was built in 1964 and reconstructed in 1985, so it is 61 years old, older 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 45,169 vehicles a day, roughly 6% of them trucks, projected to reach 60,978 by 2044. The structure is 232 ft (70.7 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 470 W
CrossesIs 70
LocationS 20 T 49 N R 31 W
RouteInterstate 470
CountyJackson County
StateMissouri
Coordinates39.04187, -94.36269
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating41.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span67 ft (20.4 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,169 (2024)
Projected traffic60,978 by 2044
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 470 W over Is 70 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1985.

What condition is Is 470 W over Is 70 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 November 2023.

How much traffic does Is 470 W over Is 70 carry?

About 45,169 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 470 W over Is 70?

The structure is 232 ft (70.7 m) long with a longest span of 67 ft (20.4 m) and a deck 44 ft wide.

Who owns Is 470 W over Is 70?

It is owned by the State Highway Agency.