US Bridges

SB Frontage Road over Ramp En

Good

Maricopa County, Arizona · 1.9 MI S JCT SR 74 · Structure no. 02879

Built
2009
16 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
107 ft
1 main span
Daily traffic
6,245
2024 count
Owner
State
State Highway Agency

About this bridge

SB Frontage Road over Ramp En is a prestressed concrete box beam or girders - single or spread carrying SB Frontage Road over Ramp En in Maricopa County, Arizona. It was built in 2009, so it is 16 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,245 vehicles a day, roughly 4% of them trucks, projected to reach 6,255 by 2042. The structure is 107 ft (32.6 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSB Frontage Road
CrossesRamp En
Location1.9 MI S JCT SR 74
RouteState Highway 17
CountyMaricopa County
StateArizona
Coordinates33.7706, -112.1304
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length107 ft (32.6 m)
Longest span99 ft (30.2 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,245 (2024)
Projected traffic6,255 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 SB Frontage Road over Ramp En built?

It was built in 2009, making it 16 years old in 2025.

What condition is SB Frontage Road over Ramp En 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 2024.

How much traffic does SB Frontage Road over Ramp En carry?

About 6,245 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SB Frontage Road over Ramp En?

The structure is 107 ft (32.6 m) long with a longest span of 99 ft (30.2 m) and a deck 48 ft wide.

Who owns SB Frontage Road over Ramp En?

It is owned by the State Highway Agency.