US Bridges

Birch Avenue over Rio De Flag

Fair

Coconino County, Arizona · Birch Ave @ Kendrick ST · Structure no. 08613

Built
1959
66 years old
Condition
Fair
inspected July 2021
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
7,636
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Birch Avenue over Rio De Flag is a concrete continuous culvert carrying Birch Avenue over Rio De Flag in Coconino County, Arizona. It was built in 1959, so it is 66 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 7,636 vehicles a day, roughly 1% of them trucks, projected to reach 7,646 by 2037. The structure is 21 ft (6.4 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBirch Avenue
CrossesRio De Flag
LocationBirch Ave @ Kendrick ST
RouteCity Street 0
CountyCoconino County
StateArizona
Coordinates35.2005, -111.6516
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable 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 loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,636 (2017)
Projected traffic7,646 by 2037
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Birch Avenue over Rio De Flag built?

It was built in 1959, making it 66 years old in 2025.

What condition is Birch Avenue 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 2021.

How much traffic does Birch Avenue over Rio De Flag carry?

About 7,636 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Birch Avenue over Rio De Flag?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 60 ft wide.

Who owns Birch Avenue over Rio De Flag?

It is owned by the City or Municipal Highway Agency.