IRR BIA RTE 18 over Colorado River

Fair Condition45 years old274 vehicles/day

Location

StateArizona
CountyLa Paz
Location2.6 Mi W Of BIA RTE 1
CarriesIRR BIA RTE 18
CrossesColorado River
Coordinates34.04258, -114.43531

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway7 (Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length560.0 ft (170.7 m)
Max Span93.2 ft (28.4 m)
Deck Width34.4 ft (10.5 m)
Deck Area1792.3 sq m
Main Spans6
Year Built1981

Traffic

Avg Daily Traffic274 (2024)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last Inspection224
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Structure Number00000000000H042

Nearby Bridges

IRR BIA RTE 1 over East Drain Ditch 2.8 mi Fair IRR BIA RTE 119 over West Way Drain 3.0 mi Fair BIA IRR RTE 24 over Irrigation Canal 3.0 mi Fair IRR BIA RTE 1 over Main Canal South 3.3 mi Good IRR BIA RTE 10 over Main Drain 3.4 mi Fair IRR BIA RTE 1 over Main Drain 4.2 mi Poor IRR BIA RTE 21 over Lateral No 90 4.4 mi Poor