US Bridges

Silverbell Road over Anklam Wash

Good

Pima County, Arizona · 0.4 MI N Speedway Blvd · Structure no. 09843

Built
1993
32 years old
Condition
Good
inspected August 2021
Type
Culvert
Concrete Continuous
Length
61 ft
5 main spans
Daily traffic
12,809
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Silverbell Road over Anklam Wash is a concrete continuous culvert carrying Silverbell Road over Anklam Wash in Pima County, Arizona. It was built in 1993, so it is 32 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 12,809 vehicles a day, roughly 10% of them trucks, projected to reach 12,819 by 2040. The structure is 61 ft (18.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSilverbell Road
CrossesAnklam Wash
Location0.4 MI N Speedway Blvd
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2403, -111.0068
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,809 (2020)
Projected traffic12,819 by 2040
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Silverbell Road over Anklam Wash built?

It was built in 1993, making it 32 years old in 2025.

What condition is Silverbell Road over Anklam 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 August 2021.

How much traffic does Silverbell Road over Anklam Wash carry?

About 12,809 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Silverbell Road over Anklam Wash?

The structure is 61 ft (18.6 m) long with a longest span of 11 ft (3.5 m).

Who owns Silverbell Road over Anklam Wash?

It is owned by the City or Municipal Highway Agency.