US Bridges

SR 318/SUNNYSIDE C over Pahrock Wash

Good

Clark County, Nevada · North of Hiko · Structure no. M1493B

Built
1977
48 years old
Condition
Good
inspected October 2024
Type
Culvert
Steel
Length
28 ft
3 main spans
Daily traffic
1,650
2021 count
Owner
State
State Highway Agency

About this bridge

SR 318/SUNNYSIDE C over Pahrock Wash is a steel culvert carrying SR 318/SUNNYSIDE C over Pahrock Wash in Clark County, Nevada. It was built in 1977, so it is 48 years old, older 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 1,650 vehicles a day, roughly 30% of them trucks, projected to reach 1,861 by 2040. The structure is 28 ft (8.4 m) long. If it were closed, the detour would be 77.1 mi (124 km).

Location

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CarriesSR 318/SUNNYSIDE C
CrossesPahrock Wash
LocationNorth of Hiko
RouteState Highway 318
CountyClark County
StateNevada
Coordinates37.69007, -115.18431
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length28 ft (8.4 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2021)
Projected traffic1,861 by 2040
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed77.1 mi (124 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 318/SUNNYSIDE C over Pahrock Wash built?

It was built in 1977, making it 48 years old in 2025.

What condition is SR 318/SUNNYSIDE C over Pahrock Wash 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 October 2024.

How much traffic does SR 318/SUNNYSIDE C over Pahrock Wash carry?

About 1,650 vehicles per day (2021 count), of which roughly 30% are trucks.

How long is SR 318/SUNNYSIDE C over Pahrock Wash?

The structure is 28 ft (8.4 m) long with a longest span of 7 ft (2.1 m).

Who owns SR 318/SUNNYSIDE C over Pahrock Wash?

It is owned by the State Highway Agency.