US Bridges

Sixth ST over Granite Creek

Fair

Yavapai County, Arizona · At JCT With Navajo DR · Structure no. 09789

Built
1950
75 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
5,500
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sixth ST over Granite Creek is a concrete continuous culvert carrying Sixth ST over Granite Creek in Yavapai County, Arizona. It was built in 1950, so it is 75 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,500 vehicles a day, roughly 10% of them trucks, projected to reach 5,510 by 2039. The structure is 21 ft (6.4 m) long and 57 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSixth ST
CrossesGranite Creek
LocationAt JCT With Navajo DR
RouteCity Street 0
CountyYavapai County
StateArizona
Coordinates34.55333, -112.465
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width57 ft (17.4 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic5,500 (2019)
Projected traffic5,510 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Sixth ST over Granite Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Sixth ST over Granite Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Sixth ST over Granite Creek carry?

About 5,500 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Sixth ST over Granite Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 57 ft wide.

Who owns Sixth ST over Granite Creek?

It is owned by the City or Municipal Highway Agency.