US Bridges

US 50 over Upper Diagonal Drain

Fair

Churchill County, Nevada · East of Fallon · Structure no. B 755

Built
1959
66 years old
Condition
Fair
inspected January 2021
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
1,300
2021 count
Owner
State
State Highway Agency

About this bridge

US 50 over Upper Diagonal Drain is a concrete culvert carrying US 50 over Upper Diagonal Drain in Churchill County, Nevada. It was built in 1959, so it is 66 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 1,300 vehicles a day, roughly 7% of them trucks, projected to reach 2,000 by 2040. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 77.1 mi (124 km).

CarriesUS 50
CrossesUpper Diagonal Drain
LocationEast of Fallon
RouteU.S. Route 50
StateNevada
Coordinates39.413, -118.6557
Functional classRural Principal Arterial - Other

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 inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2021)
Projected traffic2,000 by 2040
Trucks7%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$194,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 50 over Upper Diagonal Drain built?

It was built in 1959, making it 66 years old in 2025.

What condition is US 50 over Upper Diagonal Drain 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 January 2021.

How much traffic does US 50 over Upper Diagonal Drain carry?

About 1,300 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is US 50 over Upper Diagonal Drain?

The structure is 31 ft (9.4 m) long with a longest span of 9 ft (2.7 m).

Who owns US 50 over Upper Diagonal Drain?

It is owned by the State Highway Agency.