US Bridges

Auburn Road over Wolf Creek

Fair

Nevada County, California · 2.15 MI N/O Route 49 · Structure no. 17C0093

Built
2004
21 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
85 ft
3 main spans
Daily traffic
671
2014 count
Owner
County
County Highway Agency

About this bridge

Auburn Road over Wolf Creek is a concrete continuous slab carrying Auburn Road over Wolf Creek in Nevada County, California. It was built in 2004, so it is 21 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 5 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 671 vehicles a day, roughly 2% of them trucks, projected to reach 2,489 by 2041. The structure is 85 ft (25.9 m) long and 29 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesAuburn Road
CrossesWolf Creek
Location2.15 MI N/O Route 49
RouteCounty Highway 0
CountyNevada County
StateCalifornia
Coordinates39.1554, -121.07802
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length85 ft (25.9 m)
Longest span34 ft (10.4 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic671 (2014)
Projected traffic2,489 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Auburn Road over Wolf Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Auburn Road over Wolf Creek 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 March 2023.

How much traffic does Auburn Road over Wolf Creek carry?

About 671 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Auburn Road over Wolf Creek?

The structure is 85 ft (25.9 m) long with a longest span of 34 ft (10.4 m) and a deck 29 ft wide.

Who owns Auburn Road over Wolf Creek?

It is owned by the County Highway Agency.