US Bridges

Baseline Avenue over Weeks Wash Channel

Good

Pinal County, Arizona · 0.45 MI E of JCT Idaho RD · Structure no. 07727

Built
1990
35 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
4,918
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Baseline Avenue over Weeks Wash Channel is a prestressed concrete stringer/multi-beam or girder carrying Baseline Avenue over Weeks Wash Channel in Pinal County, Arizona. It was built in 1990, so it is 35 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 4,918 vehicles a day, roughly 17% of them trucks, projected to reach 4,928 by 2039. The structure is 63 ft (19.2 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBaseline Avenue
CrossesWeeks Wash Channel
Location0.45 MI E of JCT Idaho RD
RouteCity Street 0
CountyPinal County
StateArizona
Coordinates33.37887, -111.53752
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span61 ft (18.6 m)
Deck width40 ft (12.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,918 (2019)
Projected traffic4,928 by 2039
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Baseline Avenue over Weeks Wash Channel built?

It was built in 1990, making it 35 years old in 2025.

What condition is Baseline Avenue over Weeks Wash Channel 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 May 2023.

How much traffic does Baseline Avenue over Weeks Wash Channel carry?

About 4,918 vehicles per day (2019 count), of which roughly 17% are trucks.

How long is Baseline Avenue over Weeks Wash Channel?

The structure is 63 ft (19.2 m) long with a longest span of 61 ft (18.6 m) and a deck 40 ft wide.

Who owns Baseline Avenue over Weeks Wash Channel?

It is owned by the City or Municipal Highway Agency.