US Bridges

Fdr 20-17-04 over S. Yuba Canal

Fair

Nevada County, California · S32 T17N R11E · Structure no. 051755000001018

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Wood or Timber
Length
31 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 20-17-04 over S. Yuba Canal is a wood or timber girder and floorbeam system carrying Fdr 20-17-04 over S. Yuba Canal in Nevada County, California. It was built in 1972, so it is 53 years old, younger than the California average of 54.8 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 31 ft (9.4 m) long and 14 ft wide.

Location

Open in Google Maps
CarriesFdr 20-17-04
CrossesS. Yuba Canal
LocationS32 T17N R11E
RouteFederal Lands Road 20-
CountyNevada County
StateCalifornia
Coordinates39.28841, -120.75639
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation*: *
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating—
Inventory rating—

Structure

Structure typeGirder and Floorbeam System
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 20-17-04 over S. Yuba Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is Fdr 20-17-04 over S. Yuba Canal 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 September 2024.

How much traffic does Fdr 20-17-04 over S. Yuba Canal carry?

About 50 vehicles per day (latest count).

How long is Fdr 20-17-04 over S. Yuba Canal?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 14 ft wide.

Who owns Fdr 20-17-04 over S. Yuba Canal?

It is owned by the U.S. Forest Service.