US Bridges

I 17; NB SB Ramp over Gaddis Wash

Good

Yavapai County, Arizona · JCT SR 279 · Structure no. 06681

Built
1978
47 years old
Condition
Good
inspected September 2022
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
26,999
2022 count
Owner
State
State Highway Agency

About this bridge

I 17; NB SB Ramp over Gaddis Wash is a steel culvert carrying I 17; NB SB Ramp over Gaddis Wash in Yavapai 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 26,999 vehicles a day, roughly 24% of them trucks, projected to reach 27,009 by 2042. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 17; NB SB Ramp
CrossesGaddis Wash
LocationJCT SR 279
RouteInterstate 17
CountyYavapai County
StateArizona
Coordinates34.5766, -111.8848
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 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
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 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 traffic26,999 (2022)
Projected traffic27,009 by 2042
Trucks24%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 SB Ramp over Gaddis Wash built?

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

What condition is I 17; NB SB Ramp over Gaddis Wash 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 September 2022.

How much traffic does I 17; NB SB Ramp over Gaddis Wash carry?

About 26,999 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I 17; NB SB Ramp over Gaddis Wash?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns I 17; NB SB Ramp over Gaddis Wash?

It is owned by the State Highway Agency.