US Bridges

Is 70 E over Perche CR

Poor

Boone County, Missouri · S 8 T 48 N R 13 W · Structure no. 76

Built
1958
67 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
716 ft
1 main span
Daily traffic
24,644
2024 count
Owner
State
State Highway Agency

About this bridge

Is 70 E over Perche CR is a steel stringer/multi-beam or girder carrying Is 70 E over Perche CR in Boone County, Missouri. It was built in 1958, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 24,644 vehicles a day, roughly 24% of them trucks, projected to reach 40,663 by 2044. The structure is 716 ft (218.2 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 70 E
CrossesPerche CR
LocationS 8 T 48 N R 13 W
RouteInterstate 70
CountyBoone County
StateMissouri
Coordinates38.97104, -92.41109
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+10 approach)
Design loadHS 20 + Mod
Structure length716 ft (218.2 m)
Longest span120 ft (36.6 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,644 (2024)
Projected traffic40,663 by 2044
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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$4.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 70 E over Perche CR built?

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

What condition is Is 70 E over Perche CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Is 70 E over Perche CR carry?

About 24,644 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is Is 70 E over Perche CR?

The structure is 716 ft (218.2 m) long with a longest span of 120 ft (36.6 m) and a deck 40 ft wide.

Who owns Is 70 E over Perche CR?

It is owned by the State Highway Agency.