US Bridges

Salt Mine RD over Copper Canyon

Good

Yavapai County, Arizona · 1.3 MI SW JCT SR 260 · Structure no. 08400

Built
1979
46 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
53 ft
4 main spans
Daily traffic
600
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Salt Mine RD over Copper Canyon is a concrete continuous culvert carrying Salt Mine RD over Copper Canyon in Yavapai County, Arizona. It was built in 1979, so it is 46 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 600 vehicles a day, roughly 2% of them trucks, projected to reach 610 by 2040. The structure is 53 ft (16.2 m) long and 52 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSalt Mine RD
CrossesCopper Canyon
Location1.3 MI SW JCT SR 260
RouteCity Street 0
StateArizona
Coordinates34.5503, -111.874
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span12 ft (3.7 m)
Deck width52 ft (15.9 m)
Roadway width50 ft (15.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2020)
Projected traffic610 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Salt Mine RD over Copper Canyon built?

It was built in 1979, making it 46 years old in 2025.

What condition is Salt Mine RD over Copper Canyon 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 August 2024.

How much traffic does Salt Mine RD over Copper Canyon carry?

About 600 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Salt Mine RD over Copper Canyon?

The structure is 53 ft (16.2 m) long with a longest span of 12 ft (3.7 m) and a deck 52 ft wide.

Who owns Salt Mine RD over Copper Canyon?

It is owned by the Town or Township Highway Agency.