US Bridges

Alma School Road over Drainage Channel

Good

Maricopa County, Arizona · 0.1 MI N US 60 · Structure no. 06688

Built
1978
47 years old
Condition
Good
inspected January 2022
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
39,800
2017 count
Owner
State
State Highway Agency

About this bridge

Alma School Road over Drainage Channel is a concrete continuous culvert carrying Alma School Road over Drainage Channel in Maricopa County, Arizona. It was built in 1978, so it is 47 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 39,800 vehicles a day, roughly 3% of them trucks, projected to reach 39,810 by 2037. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAlma School Road
CrossesDrainage Channel
Location0.1 MI N US 60
RouteU.S. Route 60
CountyMaricopa County
StateArizona
Coordinates33.3868, -111.8574
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,800 (2017)
Projected traffic39,810 by 2037
Trucks3%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Alma School Road over Drainage Channel built?

It was built in 1978, making it 47 years old in 2025.

What condition is Alma School Road over Drainage Channel in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2022.

How much traffic does Alma School Road over Drainage Channel carry?

About 39,800 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Alma School Road over Drainage Channel?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns Alma School Road over Drainage Channel?

It is owned by the State Highway Agency.