US Bridges

Highland Drive over Mcmillen Wash

FairPosted for load

Gila County, Arizona · 50 Ft SE JCT Carico ST · Structure no. 08696

Built
1936
89 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
61 ft
3 main spans
Daily traffic
500
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Highland Drive over Mcmillen Wash is a concrete continuous slab carrying Highland Drive over Mcmillen Wash in Gila County, Arizona. It was built in 1936, so it is 89 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. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, roughly 1% of them trucks, projected to reach 510 by 2040. The structure is 61 ft (18.6 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHighland Drive
CrossesMcmillen Wash
Location50 Ft SE JCT Carico ST
RouteCity Street 0
CountyGila County
StateArizona
Coordinates33.39072, -110.77869
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24 US tons
Inventory rating14 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length61 ft (18.6 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic500 (2020)
Projected traffic510 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$1,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Highland Drive over Mcmillen Wash built?

It was built in 1936, making it 89 years old in 2025.

What condition is Highland Drive over Mcmillen Wash 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 May 2024.

How much traffic does Highland Drive over Mcmillen Wash carry?

About 500 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Highland Drive over Mcmillen Wash?

The structure is 61 ft (18.6 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Highland Drive over Mcmillen Wash?

It is owned by the City or Municipal Highway Agency.