US Bridges

Union Hills Drive over Dry Wash

Good

Maricopa County, Arizona · Union Hills DR & 9th ST · Structure no. 10191

Built
1999
26 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
23,113
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Union Hills Drive over Dry Wash is a concrete culvert carrying Union Hills Drive over Dry Wash in Maricopa County, Arizona. It was built in 1999, so it is 26 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 23,113 vehicles a day, roughly 2% of them trucks, projected to reach 23,123 by 2042. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesUnion Hills Drive
CrossesDry Wash
LocationUnion Hills DR & 9th ST
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.6548, -112.0613
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
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 rating64.8 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,113 (2023)
Projected traffic23,123 by 2042
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Hills Drive over Dry Wash built?

It was built in 1999, making it 26 years old in 2025.

What condition is Union Hills Drive over Dry 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 March 2024.

How much traffic does Union Hills Drive over Dry Wash carry?

About 23,113 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Union Hills Drive over Dry Wash?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.7 m).

Who owns Union Hills Drive over Dry Wash?

It is owned by the City or Municipal Highway Agency.