US Bridges

Silverlake Road over Santa Cruz River

Good

Pima County, Arizona · 0.1 MI E JCT Mission RD · Structure no. 08687

Built
1956
69 years old, rebuilt 2001
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
60 ft
4 main spans
Daily traffic
15,792
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Silverlake Road over Santa Cruz River is a concrete continuous culvert carrying Silverlake Road over Santa Cruz River in Pima County, Arizona. It was built in 1956 and reconstructed in 2001, so it is 69 years old, older 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 15,792 vehicles a day, roughly 5% of them trucks, projected to reach 15,802 by 2042. The structure is 60 ft (18.3 m) long and 95 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSilverlake Road
CrossesSanta Cruz River
Location0.1 MI E JCT Mission RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.1995, -110.99483
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span12 ft (3.7 m)
Deck width95 ft (29 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,792 (2023)
Projected traffic15,802 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Silverlake Road over Santa Cruz River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2001.

What condition is Silverlake Road over Santa Cruz River 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 Silverlake Road over Santa Cruz River carry?

About 15,792 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Silverlake Road over Santa Cruz River?

The structure is 60 ft (18.3 m) long with a longest span of 12 ft (3.7 m) and a deck 95 ft wide.

Who owns Silverlake Road over Santa Cruz River?

It is owned by the City or Municipal Highway Agency.