US Bridges

IRR BIA RTE 70 over Turkey Creek

FairPosted for load

Navajo County, Arizona · 16.1 KM South of Route 46 · Structure no. 00000000000H079

Built
1975
50 years old
Condition
Fair
inspected February 2024
Type
Girder and Floorbeam System
Steel
Length
53 ft
2 main spans
Daily traffic
10
2021 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 70 over Turkey Creek is a steel girder and floorbeam system carrying IRR BIA RTE 70 over Turkey Creek in Navajo County, Arizona. It was built in 1975, so it is 50 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 5% of them trucks, projected to reach 12 by 2038. The structure is 53 ft (16.3 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIRR BIA RTE 70
CrossesTurkey Creek
Location16.1 KM South of Route 46
RouteFederal Lands Road 70
CountyNavajo County
StateArizona
Coordinates33.68719, -109.90739
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating16.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckOpen grating
Main spans2
Design loadUnknown
Structure length53 ft (16.3 m)
Longest span26 ft (7.9 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2021)
Projected traffic12 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 70 over Turkey Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is IRR BIA RTE 70 over Turkey Creek 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 February 2024.

How much traffic does IRR BIA RTE 70 over Turkey Creek carry?

About 10 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is IRR BIA RTE 70 over Turkey Creek?

The structure is 53 ft (16.3 m) long with a longest span of 26 ft (7.9 m) and a deck 19 ft wide.

Who owns IRR BIA RTE 70 over Turkey Creek?

It is owned by the Bureau of Indian Affairs.