US Bridges

SR 429 over I 580

Good

Washoe County, Nevada · Washoe Valley · Structure no. I1945

Built
2012
13 years old
Condition
Good
inspected June 2022
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
316 ft
2 main spans
Daily traffic
1,600
2021 count
Owner
State
State Highway Agency

About this bridge

SR 429 over I 580 is a prestressed concrete continuous box beam or girders - single or spread carrying SR 429 over I 580 in Washoe County, Nevada. It was built in 2012, so it is 13 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 1,600 vehicles a day, roughly 1% of them trucks, projected to reach 6,000 by 2040. The structure is 316 ft (96.3 m) long and 74 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR 429
CrossesI 580
LocationWashoe Valley
RouteState Highway 429
StateNevada
Coordinates39.30551, -119.82601
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2022
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 alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating79 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length316 ft (96.3 m)
Longest span156 ft (47.5 m)
Deck width74 ft (22.5 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2021)
Projected traffic6,000 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 429 over I 580 built?

It was built in 2012, making it 13 years old in 2025.

What condition is SR 429 over I 580 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 June 2022.

How much traffic does SR 429 over I 580 carry?

About 1,600 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is SR 429 over I 580?

The structure is 316 ft (96.3 m) long with a longest span of 156 ft (47.5 m) and a deck 74 ft wide.

Who owns SR 429 over I 580?

It is owned by the State Highway Agency.