US Bridges

8th Street over Graveyard Wash

FairClosed to traffic

Graham County, Arizona · 150 Ft W JCT US 70 · Structure no. 01685

Built
1920
105 years old, rebuilt 1931
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
26 ft
1 main span
Daily traffic
14,272
2022 count
Owner
State
State Highway Agency

About this bridge

8th Street over Graveyard Wash is a concrete tee beam carrying 8th Street over Graveyard Wash in Graham County, Arizona. It was built in 1920 and reconstructed in 1931, so it is 105 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. Its operating status is: closed to all traffic.

It carries about 14,272 vehicles a day, roughly 9% of them trucks, projected to reach 14,282 by 2042. The structure is 26 ft (7.9 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries8th Street
CrossesGraveyard Wash
Location150 Ft W JCT US 70
RouteState Highway 70
CountyGraham County
StateArizona
Coordinates32.83112, -109.69898
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width37 ft (11.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,272 (2022)
Projected traffic14,282 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 8th Street over Graveyard Wash built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1931.

What condition is 8th Street over Graveyard 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 8th Street over Graveyard Wash carry?

About 14,272 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 8th Street over Graveyard Wash?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 37 ft wide.

Who owns 8th Street over Graveyard Wash?

It is owned by the State Highway Agency.