US Bridges

SR 77 over Eskiminzin Wash

Fair

Pinal County, Arizona · 4.5 MI South JCT SR 177 · Structure no. 00887

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
149 ft
3 main spans
Daily traffic
2,301
2022 count
Owner
State
State Highway Agency

About this bridge

SR 77 over Eskiminzin Wash is a steel continuous stringer/multi-beam or girder carrying SR 77 over Eskiminzin Wash in Pinal County, Arizona. It was built in 1965, so it is 60 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 2,301 vehicles a day, roughly 19% of them trucks, projected to reach 2,311 by 2042. The structure is 149 ft (45.4 m) long and 45 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

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CarriesSR 77
CrossesEskiminzin Wash
Location4.5 MI South JCT SR 177
RouteState Highway 77
CountyPinal County
StateArizona
Coordinates32.9315, -110.734
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length149 ft (45.4 m)
Longest span55 ft (16.8 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,301 (2022)
Projected traffic2,311 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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 Eskiminzin Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR 77 over Eskiminzin 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 August 2023.

How much traffic does SR 77 over Eskiminzin Wash carry?

About 2,301 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is SR 77 over Eskiminzin Wash?

The structure is 149 ft (45.4 m) long with a longest span of 55 ft (16.8 m) and a deck 45 ft wide.

Who owns SR 77 over Eskiminzin Wash?

It is owned by the State Highway Agency.