US Bridges

Johnson RD over I 10

Fair

Maricopa County, Arizona · 8.4 MI West of JCT SR 85 · Structure no. 01664

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
253 ft
2 main spans
Daily traffic
2,021
2021 count
Owner
State
State Highway Agency

About this bridge

Johnson RD over I 10 is a concrete continuous box beam or girders - single or spread carrying Johnson RD over I 10 in Maricopa County, Arizona. It was built in 1975, so it is 50 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 2,021 vehicles a day, roughly 5% of them trucks, projected to reach 2,031 by 2041. The structure is 253 ft (77.1 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesJohnson RD
CrossesI 10
Location8.4 MI West of JCT SR 85
RouteCounty Highway 0
CountyMaricopa County
StateArizona
Coordinates33.4467, -112.7122
Functional classRural Minor Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length253 ft (77.1 m)
Longest span125 ft (38.1 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,021 (2021)
Projected traffic2,031 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 Johnson RD over I 10 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Johnson RD over I 10 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 April 2023.

How much traffic does Johnson RD over I 10 carry?

About 2,021 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Johnson RD over I 10?

The structure is 253 ft (77.1 m) long with a longest span of 125 ft (38.1 m) and a deck 29 ft wide.

Who owns Johnson RD over I 10?

It is owned by the State Highway Agency.