US Bridges

Phelps Road over Cave Creek

Good

Maricopa County, Arizona · West of 8th Avenue · Structure no. 07732

Built
1987
38 years old
Condition
Good
inspected November 2020
Type
Culvert
Concrete Continuous
Length
73 ft
4 main spans
Daily traffic
1,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Phelps Road over Cave Creek is a concrete continuous culvert carrying Phelps Road over Cave Creek in Maricopa County, Arizona. It was built in 1987, so it is 38 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,010 by 2040. The structure is 73 ft (22.1 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPhelps Road
CrossesCave Creek
LocationWest of 8th Avenue
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.639, -112.0848
Functional classUrban Local

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 inspectionNovember 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100 US tons
Inventory rating61.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length73 ft (22.1 m)
Longest span12 ft (3.7 m)
Deck width51 ft (15.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2020)
Projected traffic1,010 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Phelps Road over Cave Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Phelps Road over Cave 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 November 2020.

How much traffic does Phelps Road over Cave Creek carry?

About 1,000 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Phelps Road over Cave Creek?

The structure is 73 ft (22.1 m) long with a longest span of 12 ft (3.7 m) and a deck 51 ft wide.

Who owns Phelps Road over Cave Creek?

It is owned by the City or Municipal Highway Agency.