US Bridges

I 80 over SR 666 Sutro ST

Fair

Washoe County, Nevada · Reno · Structure no. H 999

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Steel
Length
124 ft
1 main span
Daily traffic
121,000
2021 count
Owner
State
State Highway Agency

About this bridge

I 80 over SR 666 Sutro ST is a steel box beam or girders - multiple carrying I 80 over SR 666 Sutro ST in Washoe County, Nevada. It was built in 1970, so it is 55 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 121,000 vehicles a day, roughly 6% of them trucks, projected to reach 165,500 by 2040. The structure is 124 ft (37.8 m) long and 134 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI 80
CrossesSR 666 Sutro ST
LocationReno
RouteInterstate 80
CountyWashoe County
StateNevada
Coordinates39.53651, -119.79859
Functional classUrban Principal Arterial - Interstate

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length124 ft (37.8 m)
Longest span120 ft (36.6 m)
Deck width134 ft (40.9 m)
Roadway width132 ft (40.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic121,000 (2021)
Projected traffic165,500 by 2040
Trucks6%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 80 over SR 666 Sutro ST built?

It was built in 1970, making it 55 years old in 2025.

What condition is I 80 over SR 666 Sutro ST 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 April 2024.

How much traffic does I 80 over SR 666 Sutro ST carry?

About 121,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I 80 over SR 666 Sutro ST?

The structure is 124 ft (37.8 m) long with a longest span of 120 ft (36.6 m) and a deck 134 ft wide.

Who owns I 80 over SR 666 Sutro ST?

It is owned by the State Highway Agency.