US Bridges

IRR BIA RTE 9 over Black River

PoorPosted for load

Gila County, Arizona · 11.9 MI S. of Az HWY 73 · Structure no. 00000000000H055

Built
1930
95 years old, rebuilt 1983
Condition
Poor
inspected August 2024
Type
Truss - Deck
Steel
Length
276 ft
3 main spans
Daily traffic
5
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 9 over Black River is a steel truss - deck carrying IRR BIA RTE 9 over Black River in Gila County, Arizona. It was built in 1930 and reconstructed in 1983, so it is 95 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 15 by 2044. The structure is 276 ft (84.2 m) long and 20 ft wide. If it were closed, the detour would be 93.2 mi (150 km).

CarriesIRR BIA RTE 9
CrossesBlack River
Location11.9 MI S. of Az HWY 73
RouteFederal Lands Road 9
StateArizona
Coordinates33.713, -110.21181
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating19.1 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckWood or timber
Main spans3 (+4 approach)
Design loadUnknown
Structure length276 ft (84.2 m)
Longest span82 ft (25 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic15 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed93.2 mi (150 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$19,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 9 over Black River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1983.

What condition is IRR BIA RTE 9 over Black River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does IRR BIA RTE 9 over Black River carry?

About 5 vehicles per day (2024 count).

How long is IRR BIA RTE 9 over Black River?

The structure is 276 ft (84.2 m) long with a longest span of 82 ft (25 m) and a deck 20 ft wide.

Who owns IRR BIA RTE 9 over Black River?

It is owned by the Bureau of Indian Affairs.