US Bridges

IRR BIA RTE 15 over Window Valley Wash

Fair

Pima County, Arizona · 21 KM North of Az HWY 86 · Structure no. 00000000000H606

Built
1958
67 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete Continuous
Length
110 ft
10 main spans
Daily traffic
1,100
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 15 over Window Valley Wash is a concrete continuous culvert carrying IRR BIA RTE 15 over Window Valley Wash in Pima County, Arizona. It was built in 1958, so it is 67 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 1,100 vehicles a day, roughly 4% of them trucks, projected to reach 1,320 by 2043. The structure is 110 ft (33.5 m) long and 33 ft wide. If it were closed, the detour would be 82.6 mi (133 km).

Location

Open in Google Maps
CarriesIRR BIA RTE 15
CrossesWindow Valley Wash
Location21 KM North of Az HWY 86
RouteFederal Lands Road 15
CountyPima County
StateArizona
Coordinates32.33644, -112.06306
Functional classRural Major 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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadH 20
Structure length110 ft (33.5 m)
Longest span10 ft (3.1 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,320 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed82.6 mi (133 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
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 IRR BIA RTE 15 over Window Valley Wash built?

It was built in 1958, making it 67 years old in 2025.

What condition is IRR BIA RTE 15 over Window Valley 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 January 2023.

How much traffic does IRR BIA RTE 15 over Window Valley Wash carry?

About 1,100 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is IRR BIA RTE 15 over Window Valley Wash?

The structure is 110 ft (33.5 m) long with a longest span of 10 ft (3.1 m) and a deck 33 ft wide.

Who owns IRR BIA RTE 15 over Window Valley Wash?

It is owned by the Bureau of Indian Affairs.