US Bridges

Silver Creek Drive over Rocky Arroyo

Good

Navajo County, Arizona · 4.0 MI E JCT SR 77 · Structure no. 08772

Built
1981
44 years old
Condition
Good
inspected May 2022
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
1 main span
Daily traffic
745
2018 count
Owner
County
County Highway Agency

About this bridge

Silver Creek Drive over Rocky Arroyo is a aluminum, wrought iron, or cast iron culvert carrying Silver Creek Drive over Rocky Arroyo in Navajo County, Arizona. It was built in 1981, so it is 44 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 745 vehicles a day, roughly 2% of them trucks, projected to reach 755 by 2038. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesSilver Creek Drive
CrossesRocky Arroyo
Location4.0 MI E JCT SR 77
RouteCounty Highway 0
CountyNavajo County
StateArizona
Coordinates34.3538, -109.9975
Functional classRural Minor Collector

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 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.7 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 traffic745 (2018)
Projected traffic755 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Silver Creek Drive over Rocky Arroyo built?

It was built in 1981, making it 44 years old in 2025.

What condition is Silver Creek Drive over Rocky Arroyo 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 2022.

How much traffic does Silver Creek Drive over Rocky Arroyo carry?

About 745 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Silver Creek Drive over Rocky Arroyo?

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

Who owns Silver Creek Drive over Rocky Arroyo?

It is owned by the County Highway Agency.