US Bridges

SR 77 over Dodson Wash

Fair

Pinal County, Arizona · 7.6 MI S JCT SR 177 · Structure no. 00801

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
112 ft
4 main spans
Daily traffic
2,525
2023 count
Owner
State
State Highway Agency

About this bridge

SR 77 over Dodson Wash is a concrete continuous slab carrying SR 77 over Dodson Wash in Pinal County, Arizona. It was built in 1964, so it is 61 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 2,525 vehicles a day, roughly 10% of them trucks, projected to reach 2,535 by 2042. The structure is 112 ft (34.1 m) long and 45 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesSR 77
CrossesDodson Wash
Location7.6 MI S JCT SR 177
RouteState Highway 77
CountyPinal County
StateArizona
Coordinates32.89066, -110.71623
Functional classRural Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.8 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,525 (2023)
Projected traffic2,535 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 SR 77 over Dodson Wash built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 77 over Dodson 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 February 2024.

How much traffic does SR 77 over Dodson Wash carry?

About 2,525 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SR 77 over Dodson Wash?

The structure is 112 ft (34.1 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns SR 77 over Dodson Wash?

It is owned by the State Highway Agency.