US Bridges

I 580N over Northgate LN

Good

Carson City, Nevada · Carson City · Structure no. H2298N

Built
2001
24 years old
Condition
Good
inspected April 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
148 ft
1 main span
Daily traffic
18,750
2021 count
Owner
State
State Highway Agency

About this bridge

I 580N over Northgate LN is a prestressed concrete box beam or girders - multiple carrying I 580N over Northgate LN in Carson City, Nevada. It was built in 2001, so it is 24 years old, younger 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 18,750 vehicles a day, roughly 5% of them trucks, projected to reach 40,951 by 2040. The structure is 148 ft (45.1 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 580N
CrossesNorthgate LN
LocationCarson City
RouteU.S. Route 395
CountyCarson City
StateNevada
Coordinates39.19349, -119.76594
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating87.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span140 ft (42.7 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,750 (2021)
Projected traffic40,951 by 2040
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 580N over Northgate LN built?

It was built in 2001, making it 24 years old in 2025.

What condition is I 580N over Northgate LN 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 April 2021.

How much traffic does I 580N over Northgate LN carry?

About 18,750 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is I 580N over Northgate LN?

The structure is 148 ft (45.1 m) long with a longest span of 140 ft (42.7 m) and a deck 45 ft wide.

Who owns I 580N over Northgate LN?

It is owned by the State Highway Agency.