US Bridges

Longley LN over Airport Slough

Fair

Washoe County, Nevada · Reno · Structure no. B1580

Built
1965
60 years old, rebuilt 1978
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
78 ft
4 main spans
Daily traffic
14,800
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Longley LN over Airport Slough is a wood or timber stringer/multi-beam or girder carrying Longley LN over Airport Slough in Washoe County, Nevada. It was built in 1965 and reconstructed in 1978, so it is 60 years old, older than the Nevada average of 36.4 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.

It carries about 14,800 vehicles a day, roughly 3% of them trucks, projected to reach 39,462 by 2040. The structure is 78 ft (23.8 m) long and 63 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesLongley LN
CrossesAirport Slough
LocationReno
RouteCity Street 672
CountyWashoe County
StateNevada
Coordinates39.49487, -119.7546
Functional classUrban Other Principal 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.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating55.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length78 ft (23.8 m)
Longest span25 ft (7.6 m)
Deck width63 ft (19.1 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,800 (2021)
Projected traffic39,462 by 2040
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Longley LN over Airport Slough built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1978.

What condition is Longley LN over Airport Slough 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 May 2024.

How much traffic does Longley LN over Airport Slough carry?

About 14,800 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Longley LN over Airport Slough?

The structure is 78 ft (23.8 m) long with a longest span of 25 ft (7.6 m) and a deck 63 ft wide.

Who owns Longley LN over Airport Slough?

It is owned by the City or Municipal Highway Agency.