US Bridges

IRR BIA RTE 1 over East Drain Ditch

FairPosted for load

La Paz County, Arizona · 1.6 KM S of BIA RTE 1/18 · Structure no. 00000000000H005

Built
1962
63 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
75 ft
3 main spans
Daily traffic
2,800
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 1 over East Drain Ditch is a concrete stringer/multi-beam or girder carrying IRR BIA RTE 1 over East Drain Ditch in La Paz County, Arizona. It was built in 1962, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 2,800 vehicles a day, roughly 15% of them trucks, projected to reach 3,400 by 2044. The structure is 75 ft (23 m) long and 34 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesIRR BIA RTE 1
CrossesEast Drain Ditch
Location1.6 KM S of BIA RTE 1/18
RouteFederal Lands Road 1
StateArizona
Coordinates34.02853, -114.39014
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating31.4 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length75 ft (23 m)
Longest span25 ft (7.6 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2024)
Projected traffic3,400 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 1 over East Drain Ditch built?

It was built in 1962, making it 63 years old in 2025.

What condition is IRR BIA RTE 1 over East Drain Ditch 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 1 over East Drain Ditch carry?

About 2,800 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is IRR BIA RTE 1 over East Drain Ditch?

The structure is 75 ft (23 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.

Who owns IRR BIA RTE 1 over East Drain Ditch?

It is owned by the Bureau of Indian Affairs.