US Bridges

Rock Bl over Truckee Rvr

Fair

Washoe County, Nevada · Sparks · Structure no. B1534

Built
1971
54 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
296 ft
3 main spans
Daily traffic
8,750
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rock Bl over Truckee Rvr is a prestressed concrete continuous box beam or girders - multiple carrying Rock Bl over Truckee Rvr 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 6 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 8,750 vehicles a day, roughly 7% of them trucks, projected to reach 14,147 by 2040. The structure is 296 ft (90.2 m) long and 62 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRock Bl
CrossesTruckee Rvr
LocationSparks
RouteCity Street 668
CountyWashoe County
StateNevada
Coordinates39.51843, -119.7613
Functional classUrban Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length296 ft (90.2 m)
Longest span140 ft (42.7 m)
Deck width62 ft (18.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,750 (2021)
Projected traffic14,147 by 2040
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Bl over Truckee Rvr built?

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

What condition is Rock Bl over Truckee Rvr 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 Rock Bl over Truckee Rvr carry?

About 8,750 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Rock Bl over Truckee Rvr?

The structure is 296 ft (90.2 m) long with a longest span of 140 ft (42.7 m) and a deck 62 ft wide.

Who owns Rock Bl over Truckee Rvr?

It is owned by the City or Municipal Highway Agency.