US Bridges

FAS 529; Rock Sprg over I 17; NB

Fair

Yavapai County, Arizona · 18.1 MI N JCT SR 74 · Structure no. 00969

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
109 ft
1 main span
Daily traffic
2,206
2023 count
Owner
State
State Highway Agency

About this bridge

FAS 529; Rock Sprg over I 17; NB is a steel stringer/multi-beam or girder carrying FAS 529; Rock Sprg over I 17; NB in Yavapai County, Arizona. It was built in 1967, so it is 58 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 2,206 vehicles a day, roughly 12% of them trucks, projected to reach 2,216 by 2042. The structure is 109 ft (33.2 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFAS 529; Rock Sprg
CrossesI 17; NB
Location18.1 MI N JCT SR 74
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates34.0536, -112.1458
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating81 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length109 ft (33.2 m)
Longest span105 ft (32 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,206 (2023)
Projected traffic2,216 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 FAS 529; Rock Sprg over I 17; NB built?

It was built in 1967, making it 58 years old in 2025.

What condition is FAS 529; Rock Sprg over I 17; NB 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 FAS 529; Rock Sprg over I 17; NB carry?

About 2,206 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is FAS 529; Rock Sprg over I 17; NB?

The structure is 109 ft (33.2 m) long with a longest span of 105 ft (32 m) and a deck 43 ft wide.

Who owns FAS 529; Rock Sprg over I 17; NB?

It is owned by the State Highway Agency.