US Bridges

Skyline RD over Drainageway

Fair

Pima County, Arizona · 0.1 MI E of Alvernon · Structure no. 08905

Built
1985
40 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
24 ft
4 main spans
Daily traffic
6,643
2022 count
Owner
County
County Highway Agency

About this bridge

Skyline RD over Drainageway is a steel culvert carrying Skyline RD over Drainageway in Pima County, Arizona. It was built in 1985, so it is 40 years old, younger 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 6,643 vehicles a day, roughly 5% of them trucks, projected to reach 6,653 by 2042. The structure is 24 ft (7.3 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSkyline RD
CrossesDrainageway
Location0.1 MI E of Alvernon
RouteCounty Highway 0
CountyPima County
StateArizona
Coordinates32.32275, -110.90525
Functional classUrban Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span4 ft (1.2 m)
Deck width84 ft (25.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,643 (2022)
Projected traffic6,653 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Skyline RD over Drainageway built?

It was built in 1985, making it 40 years old in 2025.

What condition is Skyline RD over Drainageway 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 March 2024.

How much traffic does Skyline RD over Drainageway carry?

About 6,643 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Skyline RD over Drainageway?

The structure is 24 ft (7.3 m) long with a longest span of 4 ft (1.2 m) and a deck 84 ft wide.

Who owns Skyline RD over Drainageway?

It is owned by the County Highway Agency.