US Bridges

Mcclaws RD over Porter Canyon Draw

Fair

Navajo County, Arizona · 3.0 MI W JCT SR 77 · Structure no. 08159

Built
1959
66 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
2 main spans
Daily traffic
681
2024 count
Owner
County
County Highway Agency

About this bridge

Mcclaws RD over Porter Canyon Draw is a steel stringer/multi-beam or girder carrying Mcclaws RD over Porter Canyon Draw in Navajo County, Arizona. It was built in 1959, so it is 66 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 681 vehicles a day, roughly 1% of them trucks, projected to reach 691 by 2042. The structure is 81 ft (24.7 m) long and 26 ft wide.

Location

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CarriesMcclaws RD
CrossesPorter Canyon Draw
Location3.0 MI W JCT SR 77
RouteCounty Highway 0
CountyNavajo County
StateArizona
Coordinates34.887, -110.2111
Functional classRural Minor 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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span40 ft (12.2 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic681 (2024)
Projected traffic691 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mcclaws RD over Porter Canyon Draw built?

It was built in 1959, making it 66 years old in 2025.

What condition is Mcclaws RD over Porter Canyon Draw 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 July 2024.

How much traffic does Mcclaws RD over Porter Canyon Draw carry?

About 681 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Mcclaws RD over Porter Canyon Draw?

The structure is 81 ft (24.7 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns Mcclaws RD over Porter Canyon Draw?

It is owned by the County Highway Agency.