US Bridges

Maryland Avenue over 55th Ave & US 60

Good

Maricopa County, Arizona · Maryland @ 55th Ave · Structure no. 02707

Built
2004
21 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
498 ft
3 main spans
Daily traffic
4,442
2020 count
Owner
State
State Highway Agency

About this bridge

Maryland Avenue over 55th Ave & US 60 is a prestressed concrete continuous stringer/multi-beam or girder carrying Maryland Avenue over 55th Ave & US 60 in Maricopa County, Arizona. It was built in 2004, so it is 21 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 4,442 vehicles a day, roughly 3% of them trucks, projected to reach 4,452 by 2040. The structure is 498 ft (151.8 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMaryland Avenue
Crosses55th Ave & US 60
LocationMaryland @ 55th Ave
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5318, -112.1788
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length498 ft (151.8 m)
Longest span178 ft (54.3 m)
Deck width62 ft (18.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,442 (2020)
Projected traffic4,452 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.2 mi (2 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 Maryland Avenue over 55th Ave & US 60 built?

It was built in 2004, making it 21 years old in 2025.

What condition is Maryland Avenue over 55th Ave & US 60 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 July 2024.

How much traffic does Maryland Avenue over 55th Ave & US 60 carry?

About 4,442 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Maryland Avenue over 55th Ave & US 60?

The structure is 498 ft (151.8 m) long with a longest span of 178 ft (54.3 m) and a deck 62 ft wide.

Who owns Maryland Avenue over 55th Ave & US 60?

It is owned by the State Highway Agency.