US Bridges

I-17 NB Off Ramp over Skunk Creek

Good

Maricopa County, Arizona · 4.2-MI. N of I-17/101L · Structure no. 02870

Built
2008
17 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
289 ft
4 main spans
Daily traffic
3,994
2023 count
Owner
State
State Highway Agency

About this bridge

I-17 NB Off Ramp over Skunk Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying I-17 NB Off Ramp over Skunk Creek in Maricopa County, Arizona. It was built in 2008, so it is 17 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 3,994 vehicles a day, roughly 14% of them trucks, projected to reach 4,004 by 2042. The structure is 289 ft (88.1 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-17 NB Off Ramp
CrossesSkunk Creek
Location4.2-MI. N of I-17/101L
RouteInterstate 17
CountyMaricopa County
StateArizona
Coordinates33.7292, -112.12025
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length289 ft (88.1 m)
Longest span80 ft (24.4 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic3,994 (2023)
Projected traffic4,004 by 2042
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-17 NB Off Ramp over Skunk Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-17 NB Off Ramp over Skunk Creek 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 April 2024.

How much traffic does I-17 NB Off Ramp over Skunk Creek carry?

About 3,994 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I-17 NB Off Ramp over Skunk Creek?

The structure is 289 ft (88.1 m) long with a longest span of 80 ft (24.4 m) and a deck 50 ft wide.

Who owns I-17 NB Off Ramp over Skunk Creek?

It is owned by the State Highway Agency.