US Bridges

Allen Road over Aa Canal

Good

Churchill County, Nevada · South of Fallon · Structure no. B1871

Built
1975
50 years old
Condition
Good
inspected January 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
2,000
2017 count
Owner
County
County Highway Agency

About this bridge

Allen Road over Aa Canal is a concrete frame carrying Allen Road over Aa Canal in Churchill County, Nevada. It was built in 1975, so it is 50 years old, older than the Nevada average of 36.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,000 vehicles a day, roughly 8% of them trucks, projected to reach 3,000 by 2040. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesAllen Road
CrossesAa Canal
LocationSouth of Fallon
RouteCounty Highway 0
CountyChurchill County
StateNevada
Coordinates39.4069, -118.80049
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2017)
Projected traffic3,000 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
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 Allen Road over Aa Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is Allen Road over Aa Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does Allen Road over Aa Canal carry?

About 2,000 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is Allen Road over Aa Canal?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns Allen Road over Aa Canal?

It is owned by the County Highway Agency.