US Bridges

US 40 E over Is 70

Fair

Boone County, Missouri · S 7 T 48 N R 13 W · Structure no. 143

Built
1958
67 years old, rebuilt 2010
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
271 ft
4 main spans
Daily traffic
8,004
2024 count
Owner
State
State Highway Agency

About this bridge

US 40 E over Is 70 is a steel continuous stringer/multi-beam or girder carrying US 40 E over Is 70 in Boone County, Missouri. It was built in 1958 and reconstructed in 2010, so it is 67 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 8,004 vehicles a day, roughly 6% of them trucks, projected to reach 14,807 by 2044. The structure is 271 ft (82.6 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesUS 40 E
CrossesIs 70
LocationS 7 T 48 N R 13 W
RouteU.S. Route 40
CountyBoone County
StateMissouri
Coordinates38.97174, -92.43092
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 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 alignment6: Equal to present minimum criteria
Operating rating61.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length271 ft (82.6 m)
Longest span77 ft (23.5 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,004 (2024)
Projected traffic14,807 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

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 US 40 E over Is 70 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2010.

What condition is US 40 E 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 September 2023.

How much traffic does US 40 E over Is 70 carry?

About 8,004 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is US 40 E over Is 70?

The structure is 271 ft (82.6 m) long with a longest span of 77 ft (23.5 m) and a deck 33 ft wide.

Who owns US 40 E over Is 70?

It is owned by the State Highway Agency.