US Bridges

I 80W over Downtown Interchange

Good

Humboldt County, Nevada · Winnemucca · Structure no. I 871W

Built
1977
48 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
313 ft
2 main spans
Daily traffic
4,100
2021 count
Owner
State
State Highway Agency

About this bridge

I 80W over Downtown Interchange is a prestressed concrete continuous box beam or girders - single or spread carrying I 80W over Downtown Interchange in Humboldt County, Nevada. It was built in 1977, so it is 48 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 4,100 vehicles a day, roughly 38% of them trucks, projected to reach 9,950 by 2040. The structure is 313 ft (95.4 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI 80W
CrossesDowntown Interchange
LocationWinnemucca
RouteInterstate 80
CountyHumboldt County
StateNevada
Coordinates40.98071, -117.72796
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating65.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length313 ft (95.4 m)
Longest span166 ft (50.6 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2021)
Projected traffic9,950 by 2040
Trucks38%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 80W over Downtown Interchange built?

It was built in 1977, making it 48 years old in 2025.

What condition is I 80W over Downtown Interchange 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 July 2023.

How much traffic does I 80W over Downtown Interchange carry?

About 4,100 vehicles per day (2021 count), of which roughly 38% are trucks.

How long is I 80W over Downtown Interchange?

The structure is 313 ft (95.4 m) long with a longest span of 166 ft (50.6 m) and a deck 46 ft wide.

Who owns I 80W over Downtown Interchange?

It is owned by the State Highway Agency.