US Bridges

Wolf Road (cr 10) over Wolf Creek

Poor

Nevada County, California · 1.2 MI West of Route 49 · Structure no. 17C0013

Built
1968
57 years old
Condition
Poor
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
199 ft
4 main spans
Daily traffic
6,332
2014 count
Owner
County
County Highway Agency

About this bridge

Wolf Road (cr 10) over Wolf Creek is a concrete continuous tee beam carrying Wolf Road (cr 10) over Wolf Creek in Nevada County, California. It was built in 1968, so it is 57 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,332 vehicles a day, roughly 2% of them trucks, projected to reach 5,362 by 2041. The structure is 199 ft (60.6 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesWolf Road (cr 10)
CrossesWolf Creek
Location1.2 MI West of Route 49
RouteCounty Highway 0
CountyNevada County
StateCalifornia
Coordinates39.05193, -121.10825
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating36.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length199 ft (60.6 m)
Longest span55 ft (16.8 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,332 (2014)
Projected traffic5,362 by 2041
Trucks2%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wolf Road (cr 10) over Wolf Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Wolf Road (cr 10) over Wolf Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does Wolf Road (cr 10) over Wolf Creek carry?

About 6,332 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Wolf Road (cr 10) over Wolf Creek?

The structure is 199 ft (60.6 m) long with a longest span of 55 ft (16.8 m) and a deck 34 ft wide.

Who owns Wolf Road (cr 10) over Wolf Creek?

It is owned by the County Highway Agency.