US Bridges

Johnson DR S over Is 70

Fair

Lafayette County, Missouri · S 31 T 49 N R 27 W · Structure no. 46

Built
1963
62 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
221 ft
4 main spans
Daily traffic
2,226
2024 count
Owner
State
State Highway Agency

About this bridge

Johnson DR S over Is 70 is a concrete continuous slab carrying Johnson DR S over Is 70 in Lafayette County, Missouri. It was built in 1963, so it is 62 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 2,226 vehicles a day, roughly 5% of them trucks, projected to reach 3,228 by 2044. The structure is 221 ft (67.4 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesJohnson DR S
CrossesIs 70
LocationS 31 T 49 N R 27 W
RouteCounty Highway 0
CountyLafayette County
StateMissouri
Coordinates39.00771, -93.94206
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length221 ft (67.4 m)
Longest span65 ft (19.8 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,226 (2024)
Projected traffic3,228 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Johnson DR S over Is 70 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Johnson DR S 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 January 2025.

How much traffic does Johnson DR S over Is 70 carry?

About 2,226 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Johnson DR S over Is 70?

The structure is 221 ft (67.4 m) long with a longest span of 65 ft (19.8 m) and a deck 29 ft wide.

Who owns Johnson DR S over Is 70?

It is owned by the State Highway Agency.