US Bridges

Old HWY 91 over Sand Hollow Wash

FairPosted for load

Mohave County, Arizona · 2.9 MI E of Az State LN · Structure no. 08662

Built
1929
96 years old
Condition
Fair
inspected July 2023
Type
Truss - Deck
Steel
Length
370 ft
2 main spans
Daily traffic
3,755
2022 count
Owner
County
County Highway Agency

About this bridge

Old HWY 91 over Sand Hollow Wash is a steel truss - deck carrying Old HWY 91 over Sand Hollow Wash in Mohave County, Arizona. It was built in 1929, so it is 96 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. Its operating status is: posted for load restriction.

It carries about 3,755 vehicles a day, roughly 1% of them trucks, projected to reach 3,765 by 2042. The structure is 370 ft (112.8 m) long and 21 ft wide.

Location

Open in Google Maps
CarriesOld HWY 91
CrossesSand Hollow Wash
Location2.9 MI E of Az State LN
RouteCounty Highway 0
CountyMohave County
StateArizona
Coordinates36.82828, -114.00081
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48 US tons
Inventory rating30 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+4 approach)
Design loadH 15
Structure length370 ft (112.8 m)
Longest span80 ft (24.4 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,755 (2022)
Projected traffic3,765 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 statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old HWY 91 over Sand Hollow Wash built?

It was built in 1929, making it 96 years old in 2025.

What condition is Old HWY 91 over Sand Hollow 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 July 2023.

How much traffic does Old HWY 91 over Sand Hollow Wash carry?

About 3,755 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Old HWY 91 over Sand Hollow Wash?

The structure is 370 ft (112.8 m) long with a longest span of 80 ft (24.4 m) and a deck 21 ft wide.

Who owns Old HWY 91 over Sand Hollow Wash?

It is owned by the County Highway Agency.