US Bridges

SR 170 Riverside over Virgin River

Fair

Clark County, Nevada · West of Bunkerville · Structure no. B 85

Built
2007
18 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
880 ft
5 main spans
Daily traffic
240
2021 count
Owner
State
State Highway Agency

About this bridge

SR 170 Riverside over Virgin River is a steel continuous stringer/multi-beam or girder carrying SR 170 Riverside over Virgin River in Clark County, Nevada. It was built in 2007, so it is 18 years old, younger 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 240 vehicles a day, roughly 1% of them trucks, projected to reach 300 by 2040. The structure is 880 ft (268.2 m) long and 39 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSR 170 Riverside
CrossesVirgin River
LocationWest of Bunkerville
RouteState Highway 170
StateNevada
Coordinates36.73439, -114.22002
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.1 US tons
Inventory rating61.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length880 ft (268.2 m)
Longest span190 ft (57.9 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2021)
Projected traffic300 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 170 Riverside over Virgin River built?

It was built in 2007, making it 18 years old in 2025.

What condition is SR 170 Riverside over Virgin River 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 December 2023.

How much traffic does SR 170 Riverside over Virgin River carry?

About 240 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is SR 170 Riverside over Virgin River?

The structure is 880 ft (268.2 m) long with a longest span of 190 ft (57.9 m) and a deck 39 ft wide.

Who owns SR 170 Riverside over Virgin River?

It is owned by the State Highway Agency.