US Bridges

I 580 Ramp over SR647 4th ST SPRR

Fair

Washoe County, Nevada · Reno · Structure no. G1233R

Built
1971
54 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
460 ft
6 main spans
Daily traffic
24,100
2021 count
Owner
State
State Highway Agency

About this bridge

I 580 Ramp over SR647 4th ST SPRR is a steel continuous stringer/multi-beam or girder carrying I 580 Ramp over SR647 4th ST SPRR in Washoe County, Nevada. It was built in 1971, so it is 54 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 24,100 vehicles a day, roughly 4% of them trucks, projected to reach 54,602 by 2040. The structure is 460 ft (140.2 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 580 Ramp
CrossesSR647 4th ST SPRR
LocationReno
RouteInterstate 580
CountyWashoe County
StateNevada
Coordinates39.53361, -119.78727
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length460 ft (140.2 m)
Longest span95 ft (29 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,100 (2021)
Projected traffic54,602 by 2040
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 580 Ramp over SR647 4th ST SPRR built?

It was built in 1971, making it 54 years old in 2025.

What condition is I 580 Ramp over SR647 4th ST SPRR 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 580 Ramp over SR647 4th ST SPRR carry?

About 24,100 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is I 580 Ramp over SR647 4th ST SPRR?

The structure is 460 ft (140.2 m) long with a longest span of 95 ft (29 m) and a deck 43 ft wide.

Who owns I 580 Ramp over SR647 4th ST SPRR?

It is owned by the State Highway Agency.