US Bridges

IRR SR 85; FAP 075 over Gillespie Canal

Fair

Maricopa County, Arizona · 0.7 MI S JCT SR B 8 · Structure no. 00735

Built
1963
62 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
2,690
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 85; FAP 075 over Gillespie Canal is a prestressed concrete box beam or girders - multiple carrying IRR SR 85; FAP 075 over Gillespie Canal in Maricopa County, Arizona. It was built in 1963, so it is 62 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 6 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 2,690 vehicles a day, roughly 16% of them trucks, projected to reach 999,999 by 2042. The structure is 56 ft (17.1 m) long and 44 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesIRR SR 85; FAP 075
CrossesGillespie Canal
Location0.7 MI S JCT SR B 8
RouteState Highway 85
CountyMaricopa County
StateArizona
Coordinates32.9366, -112.7334
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating38 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,690 (2022)
Projected traffic999,999 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 85; FAP 075 over Gillespie Canal built?

It was built in 1963, making it 62 years old in 2025.

What condition is IRR SR 85; FAP 075 over Gillespie Canal 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 SR 85; FAP 075 over Gillespie Canal carry?

About 2,690 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is IRR SR 85; FAP 075 over Gillespie Canal?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns IRR SR 85; FAP 075 over Gillespie Canal?

It is owned by the State Highway Agency.