US Bridges

Derby RD over Humboldt Rvr

Fair

Pershing County, Nevada · South of Lovelock · Structure no. B1618

Built
2002
23 years old
Condition
Fair
inspected May 2021
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
61
2017 count
Owner
County
County Highway Agency

About this bridge

Derby RD over Humboldt Rvr is a concrete continuous slab carrying Derby RD over Humboldt Rvr in Pershing County, Nevada. It was built in 2002, so it is 23 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 61 vehicles a day, projected to reach 151 by 2040. The structure is 90 ft (27.4 m) long and 24 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesDerby RD
CrossesHumboldt Rvr
LocationSouth of Lovelock
RouteCounty Highway 0
CountyPershing County
StateNevada
Coordinates40.05198, -118.46775
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating68.7 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length90 ft (27.4 m)
Longest span35 ft (10.7 m)
Deck width24 ft (7.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2017)
Projected traffic151 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$315,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Derby RD over Humboldt Rvr built?

It was built in 2002, making it 23 years old in 2025.

What condition is Derby RD over Humboldt 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 May 2021.

How much traffic does Derby RD over Humboldt Rvr carry?

About 61 vehicles per day (2017 count).

How long is Derby RD over Humboldt Rvr?

The structure is 90 ft (27.4 m) long with a longest span of 35 ft (10.7 m) and a deck 24 ft wide.

Who owns Derby RD over Humboldt Rvr?

It is owned by the County Highway Agency.