US Bridges

W. Cottage Ave over Rio De Flag

Fair

Coconino County, Arizona · 350 Ft E of Beaver ST · Structure no. 08710

Built
1900
125 years old, rebuilt 1960
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
42 ft
2 main spans
Daily traffic
2,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W. Cottage Ave over Rio De Flag is a concrete continuous culvert carrying W. Cottage Ave over Rio De Flag in Coconino County, Arizona. It was built in 1900 and reconstructed in 1960, so it is 125 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 5 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,010 by 2042. The structure is 42 ft (12.8 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesW. Cottage Ave
CrossesRio De Flag
Location350 Ft E of Beaver ST
RouteCity Street 0
CountyCoconino County
StateArizona
Coordinates35.19578, -111.65049
Functional classUrban Local

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span10 ft (3 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic2,010 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 W. Cottage Ave over Rio De Flag built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1960.

What condition is W. Cottage Ave over Rio De Flag 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 July 2023.

How much traffic does W. Cottage Ave over Rio De Flag carry?

About 2,000 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is W. Cottage Ave over Rio De Flag?

The structure is 42 ft (12.8 m) long with a longest span of 10 ft (3 m) and a deck 37 ft wide.

Who owns W. Cottage Ave over Rio De Flag?

It is owned by the City or Municipal Highway Agency.