US Bridges

SR 51 Ramp N-W over L101 Ramp W-S

Good

Maricopa County, Arizona · 0.2 MI S JCT L101 · Structure no. 01463

Built
2003
22 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
436 ft
4 main spans
Daily traffic
26,155
2022 count
Owner
State
State Highway Agency

About this bridge

SR 51 Ramp N-W over L101 Ramp W-S is a prestressed concrete continuous box beam or girders - single or spread carrying SR 51 Ramp N-W over L101 Ramp W-S in Maricopa County, Arizona. It was built in 2003, so it is 22 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 26,155 vehicles a day, roughly 7% of them trucks, projected to reach 26,165 by 2042. The structure is 436 ft (132.9 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 51 Ramp N-W
CrossesL101 Ramp W-S
Location0.2 MI S JCT L101
RouteState Highway 51
CountyMaricopa County
StateArizona
Coordinates33.66911, -111.99956
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating50 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length436 ft (132.9 m)
Longest span143 ft (43.6 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic26,155 (2022)
Projected traffic26,165 by 2042
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 51 Ramp N-W over L101 Ramp W-S built?

It was built in 2003, making it 22 years old in 2025.

What condition is SR 51 Ramp N-W over L101 Ramp W-S 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 November 2023.

How much traffic does SR 51 Ramp N-W over L101 Ramp W-S carry?

About 26,155 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR 51 Ramp N-W over L101 Ramp W-S?

The structure is 436 ft (132.9 m) long with a longest span of 143 ft (43.6 m) and a deck 55 ft wide.

Who owns SR 51 Ramp N-W over L101 Ramp W-S?

It is owned by the State Highway Agency.