US Bridges

Silverbell RD over Wash

Fair

Pima County, Arizona · 0.3 MI N of Belmont · Structure no. 09230

Built
1937
88 years old
Condition
Fair
inspected November 2023
Type
Culvert
Steel
Length
30 ft
1 main span
Daily traffic
5,951
2022 count
Owner
County
County Highway Agency

About this bridge

Silverbell RD over Wash is a steel culvert carrying Silverbell RD over Wash in Pima County, Arizona. It was built in 1937, so it is 88 years old, older 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 5,951 vehicles a day, projected to reach 5,961 by 2042. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSilverbell RD
CrossesWash
Location0.3 MI N of Belmont
RouteCounty Highway 313
CountyPima County
StateArizona
Coordinates32.32973, -111.08028
Functional classUrban Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,951 (2022)
Projected traffic5,961 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Silverbell RD over Wash built?

It was built in 1937, making it 88 years old in 2025.

What condition is Silverbell 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 November 2023.

How much traffic does Silverbell RD over Wash carry?

About 5,951 vehicles per day (2022 count).

How long is Silverbell RD over Wash?

The structure is 30 ft (9.1 m) long with a longest span of 22 ft (6.7 m).

Who owns Silverbell RD over Wash?

It is owned by the County Highway Agency.