US Bridges

N Frontage RD over Wash

Fair

Maricopa County, Arizona · 3.7 MI W JCT I-17 · Structure no. 06979

Built
1985
40 years old
Condition
Fair
inspected May 2021
Type
Culvert
Concrete Continuous
Length
72 ft
6 main spans
Daily traffic
32,043
2020 count
Owner
State
State Highway Agency

About this bridge

N Frontage RD over Wash is a concrete continuous culvert carrying N Frontage RD over Wash in Maricopa County, Arizona. It was built in 1985, so it is 40 years old, younger 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 32,043 vehicles a day, roughly 4% of them trucks, projected to reach 32,053 by 2040. The structure is 72 ft (21.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

No coordinates are recorded for this structure.

CarriesN Frontage RD
CrossesWash
Location3.7 MI W JCT I-17
RouteState Highway 101
CountyMaricopa County
StateArizona
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 inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,043 (2020)
Projected traffic32,053 by 2040
Trucks4%
Lanes on structure2
Traffic directionHighway traffic not carried
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Frontage RD over Wash built?

It was built in 1985, making it 40 years old in 2025.

What condition is N Frontage RD over Wash 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 May 2021.

How much traffic does N Frontage RD over Wash carry?

About 32,043 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is N Frontage RD over Wash?

The structure is 72 ft (21.9 m) long with a longest span of 10 ft (3 m).

Who owns N Frontage RD over Wash?

It is owned by the State Highway Agency.