US Bridges

SR659 Emccarran over Boynton Slough

Fair

Washoe County, Nevada · Sparks · Structure no. B1424

Built
1981
44 years old
Condition
Fair
inspected April 2022
Type
Culvert
Concrete
Length
70 ft
5 main spans
Daily traffic
22,200
2021 count
Owner
State
State Highway Agency

About this bridge

SR659 Emccarran over Boynton Slough is a concrete culvert carrying SR659 Emccarran over Boynton Slough in Washoe County, Nevada. It was built in 1981, so it is 44 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 22,200 vehicles a day, roughly 6% of them trucks, projected to reach 47,156 by 2040. The structure is 70 ft (21.3 m) long and 99 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR659 Emccarran
CrossesBoynton Slough
LocationSparks
RouteCity Street 659
CountyWashoe County
StateNevada
Coordinates39.4937, -119.74811
Functional classUrban Other Principal 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.2 US tons
Inventory rating56.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span12 ft (3.7 m)
Deck width99 ft (30.2 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,200 (2021)
Projected traffic47,156 by 2040
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR659 Emccarran over Boynton Slough built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR659 Emccarran over Boynton Slough 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 2022.

How much traffic does SR659 Emccarran over Boynton Slough carry?

About 22,200 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR659 Emccarran over Boynton Slough?

The structure is 70 ft (21.3 m) long with a longest span of 12 ft (3.7 m) and a deck 99 ft wide.

Who owns SR659 Emccarran over Boynton Slough?

It is owned by the State Highway Agency.